User manual ZOOM A2.1U

Operation Manual © ZOOM Corporation Reproduction of this manual, in whole or in part, by any means, is prohibited. SAFETY PRECAUTIONS Usage Precautions Handling SAFETY PRECAUTIONS In this manual, symbols are used to highlight warnings and cautions for you to read so that accidents can be prevented. The meanings of these symbols are as follows: This symbol indicates explanations about extremely dangerous matters. If users ignore this symbol and Warning handle the device the wrong way, serious injury or death could result. This symbol indicates explanations about dangerous matters. If users ignore this symbol and handle the device the wrong way, bodily injury and damage to the equipment could result. Warning · Never place objects filled with liquids, such as vases, on the A2.1u since this can cause electric shock. · Do not place naked flame sources, such as lighted candles, on the A2.1u since this can cause fire. · The A2.1u is a precision instrument. Do not exert undue pressure on the keys and other controls. Also take care not to drop the unit, and do not subject it to shock or excessive pressure. · Take care that no foreign objects (coins or pins etc.) or liquids can enter the unit. Caution Connecting cables and input and output jacks You should always turn off the power to the A2.1u and all other equipment before connecting or disconnecting any cables. Also make sure to disconnect all connection cables and the power cord before moving the A2.1u. Caution Please observe the following safety tips and precautions to ensure hazard-free use of the A2.1u. Alterations Warning Power requirements Warning Since power consumption of this unit is fairly high, we recommend the use of an AC adapter whenever possible. When powering the unit from batteries, use only alkaline types. [AC adapter operation] · Be sure to use only an AC adapter which supplies 9 V DC, 300 mA and is equipped with a "center minus" plug (Zoom AD-0006). The use of an adapter other than the specified type may damage the unit and pose a safety hazard. · Connect the AC adapter only to an AC outlet that supplies the rated voltage required by the adapter. · When disconnecting the AC adapter from the AC outlet, always grasp the adapter itself and do not pull at the cable. · During lightning or when not using the unit for an extended period, disconnect the AC adapter from the AC outlet. Never open the case of the A2.1u or attempt to modify the product in any way since this can result in damage to the unit. Volume Caution Do not use the A2.1u at a loud volume for a long time since this can cause hearing impairment. Usage Precautions Electrical interference For safety considerations, the A2.1u has been designed to provide maximum protection against the emission of electromagnetic radiation from inside the device, and protection from external interference. However, equipment that is very susceptible to interference or that emits powerful electromagnetic waves should not be placed near the A2.1u, as the possibility of interference cannot be ruled out entirely. With any type of digital control device, the A2.1u included, electromagnetic interference can cause malfunctioning and can corrupt or destroy data. Care should be taken to minimize the risk of damage. [Battery operation] · Use four conventional IEC R6 (size AA) batteries (alkaline). · The A2.1u cannot be used for recharging. · Pay close attention to the labelling of the battery to make sure you choose the correct type. · When not using the unit for an extended period, remove the batteries from the unit. · If battery leakage has occurred, wipe the battery compartment and the battery terminals carefully to remove all remnants of battery fluid. · While using the unit, the battery compartment cover should be closed. Cleaning Use a soft, dry cloth to clean the A2.1u. If necessary, slightly moisten the cloth. Do not use abrasive cleanser, wax, or solvents (such as paint thinner or cleaning alcohol), since these may dull the finish or damage the surface. Environment Warning To prevent the risk of fire, electric shock or malfunction, avoid using your A2.1u in environments where it will be exposed to: · · · · · Extreme temperatures Heat sources such as radiators or stoves High humidity or moisture Excessive dust or sand Excessive vibration or shock Please keep this manual in a convenient place for future reference. * Windows and Windows XP are registered trademarks of Microsoft Corporation. * Macintosh is a registered trademark of Apple Computer. * All other product names, trademarks, and company names mentioned in this manual are the property of their respective owners. 2 ZOOM A2.1u Contents SAFETY PRECAUTIONS Usage Precautions .................................... 2 Features ............................................................................................... 4 Terms Used in This Manual ................................................................ 5 Controls and Functions / Connections ............................................. 6 Selecting a Patch ................................................................................ 8 Using the Tuner ................................................................................. 10 Using the Rhythm Function .............................................................. 12 Editing a Patch .................................................................................. 14 Storing/Copying Patches .................................................................. 16 Using the Built-in Expression Pedal ................................................ 18 Using the Feedback Control ............................................................ 20 Manual operation of feedback control .............................................. 20 Automatic detection of feedback frequency .................................... 21 Using the built-in expression pedal to operate the feedback control function .................................................................................. 22 Using Manual Mode .......................................................................... 23 Other Functions ................................................................................. 24 Making settings for the built-in expression pedal ............................ 24 Adjusting the sensitivity of the built-in expression pedal ................ 24 Using an external expression pedal (FP01/FP02) ............................. 25 Using a foot switch (FS01) ................................................................. 25 Using the A2.1u as audio interface for a computer .......................... 26 Use as a direct box ............................................................................ 27 Starting the A2.1u in HI-GAIN mode ................................................. 28 Restoring Factory Defaults ................................................................ 28 Linking Effects ................................................................................... 29 CONTROL module and GLOBAL module ......................................... 29 Effect Types and Parameters ........................................................... 30 How to read the parameter table ...................................................... 30 MODEL ........................................................................................... 31 MIC ................................................................................................ 32 COMP/LIMIT .................................................................................. 32 LO EQ ............................................................................................ 32 HI EQ .............................................................................................. 33 ZNR ................................................................................................ 33 MOD/EFX ....................................................................................... 33 DELAY/REVERB ............................................................................. 35 CONTROL ...................................................................................... 37 GLOBAL ......................................................................................... 38 Troubleshooting ................................................................................ 38 Specifications .................................................................................... 39 A2.1u Preset Pattern .............................................................. Back cover The FCC regulation warning (for U.S.A.) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Reorient or relocate the receiving antenna. · Increase the separation between the equipment and receiver. · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. · Consult the dealer or an experienced radio/TV technician for help. ZOOM A2.1u 3 Features Thank you for selecting the ZOOM A2.1u (simply called the "A2.1u" in this manual). The A2.1u is a sophisticated effect processor for acoustic guitar with the following features. Latest technology for top performance Excellent sound quality is assured by signal processing circuitry featuring 96 kHz/24 bit sampling and internal 32-bit processing. Frequency response remains flat to 40 kHz, and signal-to-noise ratio is an amazing 100 dB or better. A built-in USB port serves for direct connection to a computer. You can use the A2.1u as audio interface for the computer, allowing direct recording with the supplied DAW software. Full array of effects optimized for acoustic guitar Out of a versatile palette of 47 effects, up to eight (including ZNR) can be used simultaneously. The A2.1u offers effects which simulate the sound of famous acoustic guitars, a mic simulator that creates the ambience of microphone recording, and other specialized acoustic guitar effects. Select optimum characteristics for pickups and amps The A2.1u allows you to select the best frequency response for your pickup and amp. This is great for eliminating sonic problems that can occur when playing an acoustic guitar through a guitar amplifier. Automatic suppression of acoustic feedback The feedback control feature pinpoints the frequency where acoustic feedback (howling) occurs and provides an efficient cure. The function can be activated by foot switch during a performance. XLR connector for direct output In addition to the regular output jack, the A2.1u features an XLR connector for sending a balanced linelevel signal to equipment such as a PA mixer or recording console. The signal can be derived from a point before or after effect processing. A ground lift switch is also provided, which is useful to prevent hum in the direct output caused by ground loops. Advanced interface Rotary selectors and three parameter knobs make operation extremely quick and intuitive. The muting interval when switching patches has been reduced to less than 8 milliseconds, allowing virtually seamless patch changes. Rhythm function and auto-chromatic tuner Rhythm patterns created from highly realistic PCM sources are built in. The auto-chromatic tuner designed for guitar makes tuning easy and quick. Support for foot switch and expression pedal operation Adjust effect parameters or volume in real time with the expression pedal that is built right into the unit. In addition, the CONTROL IN jack on the rear panel lets you connect an optional external pedal (FP01/ FP02) or a foot switch (FS01). Dual power supply principle allows use anywhere The A2.1u can be powered from four IEC R6 (size AA) batteries or an AC adapter. Continuous operating time is approximately 6 hours with alkaline batteries. Please take the time to read this manual carefully, in order to get the most out of your A2.1u and to ensure optimum performance and reliability. 4 ZOOM A2.1u Terms Used in This Manual This section explains some important terms that are used throughout the A2.1u documentation. IN MODEL MIC COMP/LIMIT LO EQ HI EQ ZNR MOD/EFX DELAY/REVERB OUT Effect module As shown in the illustration above, the A2.1u can be thought of as a combination of several single effects. Each of these is referred to as an effect module. Among others, there is a module for ZNR (ZOOM Noise Reduction), as well as a modeling (sound simulation) module (MODEL), compressor/limiter module (COMP/LIMIT), modulation/special effects module (MOD/EFX). Parameters such as effect intensity can be adjusted for each module individually, and modules can be switched on and off. Effect type Most effect modules comprise several different effects which are referred to as effect types. For example, the MOD/EFX module comprises chorus, flanger, delay, phaser, and other effect types. Only one of these can be selected at any time. Effect parameter All effect modules have various parameters that can be adjusted. These are called effect parameters. In the A2.1u, effect parameters are adjusted with the parameter knobs 1 ­ 3. Similar to the knobs on a compact effect, these change aspects such as tonal character and effect intensity. Which parameter is assigned to each knob depends on the currently selected effect module and effect type. Patch In the A2.1u, effect module combinations are stored and called up in units referred to as patches. A patch comprises information about the on/off status of each effect module, about the effect type used in each module, and about effect parameter settings. The internal memory of the A2.1u holds 80 patches (40 of these can be rewritten by the user). Bank and area A group of ten patches is called a bank. The memory of the A2.1u comprises a total of eight banks, labelled A to d and 0 to 3. Banks A ­ d form the user area which allows read/write patches. Banks 0 to 3 are the preset area of read-only. The patches within each bank are numbered 0 through 9. To specify a patch, you use the format "A1" (patch number 1 from bank A), "06" (patch number 6 from bank 0), etc. Modes The A2.1u has the following operation modes. Play mode In this mode, patches can be selected and played. Manual mode In this mode, you play your instrument while using the foot switches to turn the MOD/EFX module or the feedback control function on and off. The mode also is used for automatic detection of acoustic feedback frequency. Edit mode In this mode, the effect parameters of a patch can be edited (changed). Operating the A2.1u on batteries 1. Turn the A2.1u over and open the cover of the battery compartment on the bottom. A2.1u bottom view Latch 2. Insert four fresh IEC R6 (size AA) batteries. Four IEC R6 (size AA) batteries 3. Close the cover of the battery compartment. Push the cover in until the latch audibly snaps into place. Insert batteries facing in alternate directions. Latch Cover Use four IEC R6 (size AA) batteries. When the batteries are getting low, the indication "bt" appears on the display. Press the latch to release it and then raise the cover. ZOOM A2.1u 5 Controls and Functions / Connections Module selector Switches between play/manual mode and edit mode. In edit mode, the knob selects the module for operation. Top Panel BANK [-]/[+] keys In play mode and manual mode, the keys serve for directly switching to the next lower or higher bank. In edit mode, the keys switch the effect type for the currently selected module. [STORE] key Serves for storing edited patches in memory. Display Shows patch numbers, setting values, and other information about operating the A2.1u. [W]/[Q] foot switches These switches serve for selecting patches, turning effect modules on and off, controlling the tuner, and other functions. Computer Rear Panel [USB] connector Allows you to connect the A2.1u to a computer, for use as an audio interface. [BALANCED OUT] connector This XLR connector can be used to send a balanced line-level signal to PA equipment, recording devices, or similar. [PRE/POST] switch Selects the point where the signal supplied at the [BALANCED OUT] connector is branched off. Mixer [GROUND] switch Determines whether the [BALANCED OUT] connector is grounded or not. PA system Headphones 6 ZOOM A2.1u Controls and Functions / Connections Parameter knobs 1 - 3 These knobs allow changing the value of effect parameters or the level of the overall patch. During rhythm playback, the knobs let you select a pattern, set the tempo, and adjust the rhythm volume. [PEDAL ASSIGN] key This key lets you select the function of the built-in expression pedal. The currently selected function is shown by a lit LED. [MANUAL] key Switches between play mode and manual mode. The key is lit when the A2.1u is in manual mode. RHYTHM [R/P] key Serves to start and stop rhythm playback. Expression pedal Lets you adjust the volume or various effect parameters in real time during play. [INPUT] jack Serves for connecting an acoustic guitar with a pickup, an electroacoustic guitar, or an electric guitar. Acoustic Guitar NOTE When using a guitar with low output level, the input gain of the A2.1u can be increased by selecting the HI-GAIN mode ( p. 28). [DC 9V] jack An AC adapter (ZOOM AD-0006) with a rated output of 9 volts DC, 300 mA (center minus plug) can be plugged into this jack. AC adapter [POWER] switch Turns the unit on and off. FP01/FP02 FS01 [CONTROL IN] jack Serves for connection of an optional foot switch (FS01) or expression pedal (FP01/FP02). [OUTPUT/PHONES] jack This stereo phone jack can be used for connection to a guitar amplifier or hi-fi system. It is also possible to use a Y cable for sending the output to two amplifiers, or to plug a pair of stereo headphones into this jack. ZOOM A2.1u 7 Selecting a Patch While playing your instrument, try out various patches to see what the A2.1u can do. Turn power on Use a shielded cable with mono phone plug to connect your guitar to the [INPUT] jack of the A2.1u. To power the A2.1u from the AC adapter, plug the adapter into a wall outlet and plug the cable from the adapter into the [DC 9V] jack on the A2.1u. Set the [POWER] switch on the rear panel of the A2.1u to ON. Turn the playback system on and adjust the volume to a suitable position. Set the A2.1u to play mode If the Module selector is set to a position other than "PLAY", set it to "PLAY". The bank and patch that were selected when the power was last turned off will appear on the display. A1 Bank name Patch number HINT Immediately after turning the A2.1u on, the unit will be in play mode, even if the Module selector is set to a position other than "PLAY". Select a patch To switch the patch, press one of the [W]/[Q] foot switches. Pressing the [W] foot switch calls up the next lower patch, and pressing the [Q] foot switch calls up the next higher patch. Repeatedly pressing one foot switch cycles through patches in the order A0 ­ A9 ... d0 ­ d9 00 ­ 09 ... 30 ­ 39 A0, or the reverse order. 8 ZOOM A2.1u Selecting a Patch Adjust tone and volume To adjust the effect sound and volume levels in play mode, the Parameter knobs 1 ­ 3 can be used. Each knob controls a specific parameter. Parameter knob 1 Mainly adjusts the MIX parameter of the MOD/EFX module (the level of the effect sound mixed to the orignal sound). Parameter knob 3 Adjusts the PATCH LEVEL parameter (output level of the entire patch). Parameter knob 2 Adjusts the MIX parameter of the DELAY/REVERB module (the level of the effect sound mixed to the orignal sound). When you turn a Parameter knob, the corresponding LED lights up and the display briefly shows the current value of the respective parameter. NOTE · If the MOD/EFX module or DELAY/REVERB module is set to off for the currently selected patch (display shows "oF"), the respective parameter knobs (1 or 2) have no effect. · Changes made here are temporary and will be lost when you select another patch. To retain the changes, store the patch ( p. 16). · Besides the individual patch levels, the A2.1u also allows adjusting the master level. This setting affects all patches ( p. 37). Directly selecting a bank To select the banks A ­ d, 0 ­ 3 directly, use the BANK [-]/[+] keys. Pressing the BANK [-] key calls up the next lower bank, and pressing the BANK [+] key calls up the next higher bank. ZOOM A2.1u 9 Using the Tuner The A2.1u incorporates an auto-chromatic tuner. To use the tuner function, the built-in effects must be bypassed (temporarily turned off) or muted (original sound and effect sound turned off). Switch to bypass or mute Setting the A2.1u to the bypass condition In play mode (or manual mode), press both [W]/[Q] foot switches together briefly and release. In play mode (or manual mode), press both [W]/[Q] foot switches together and hold for at least 1 second. BP MT Setting the A2.1u to the mute condition Patch change at bypass/mute When you press both [W]/[Q] foot switches together while playing your instrument, the bypass/mute condition is activated. However, the sound may change momentarily just before the condition is activated. This is because the A2.1u switches to the next higher or lower patch when one of the foot switches is pressed slightly earlier. (When you cancel the bypass/mute condition, the original patch number will be active again.) This kind of behavior is not a defect. It is due to the very high speed at which the A2.1u responds to patch switching. To prevent the sound change caused by the above condition, do not produce sound with your instrument until the bypass/mute condition is fully established. Play the string to tune Play the open string to tune, and adjust the pitch. A8 The left side of the display shows the note which is closest to the current pitch. 10 ZOOM A2.1u Using the Tuner Adjusting the reference pitch of the tuner If required, you can fine-adjust the reference pitch of the A2.1u tuner. The default setting after power-on is center A = 440 Hz. Turn parameter knob 1. The current reference pitch is shown. The adjustment range is 35 ­ 45 (center A = 435 to 445 Hz). 40 42 While the reference pitch value is shown, turn parameter knob 1 to adjust it. When you release the parameter knob, the display indication will return to the previous condition after a while. NOTE When you turn the A2.1u off and on again, the reference pitch setting will be reset to 40 (center A = 440 Hz). Return to play mode Press one of the [W]/[Q] foot switches. The right side of the display shows a symbol that indicates by how much the tuning is off. Pitch is high Pitch is correct Pitch is low A8 Tune other strings in the same way. Indication turns faster the more the pitch is off. ZOOM A2.1u 11 Using the Rhythm Function The A2.1u has a built-in rhythm function that plays realistic drum sounds in various patterns. The rhythm function is available in play mode or in the bypass/mute condition. Set the A2.1u to play mode (or manual mode) If the Module selector is set to a position other than "PLAY", set it to "PLAY". HINT The rhythm function can be used both in play mode and manual mode. Start the rhythm function To start the rhythm function, press the RHYTHM [R/P] key. NOTE While the rhythm is playing, the DELAY/REVERB module is set to off. Select a rhythm pattern The A2.1u has 40 built-in rhythm patterns. For more information on the pattern contents, see the back cover of this manual. To continuously switch rhythm patterns, turn parameter knob 1. To select the next higher or next lower rhythm pattern, press one of the BANK [-]/[+] keys. When the above steps are carried out, the current rhythm pattern number (01 ­ 40) is briefly shown on the display. 12 ZOOM A2.1u Using the Rhythm Function Adjust the rhythm volume To adjust the rhythm volume, turn parameter knob 3. When you turn the parameter knob, the current setting (0 ­ 30) is shown on the display. 25 Adjust the tempo The rhythm pattern tempo can be adjusted in the range of 40 ­ 250 BPM (beats per minute). To continuously change the rhythm tempo, turn parameter knob 2. By connecting a foot switch (FS01) to the [CONTROL IN] jack and assigning the "tap tempo" function to it, you can specify the tempo by tapping the foot switch in the desired interval ( p 25). When you tap the foot switch the first time, the current tempo setting is shown. The setting is then adjusted automatically at the second and subsequent taps. While the above steps are carried out, the current tempo value (40 - 250) is shown on the display. For values in the range from 100 to 199, a dot is shown in the center. For values of 200 and above, dots are shown in the center and at right. Stop the rhythm To stop the rhythm, press the RHYTHM [R/P] key. The A2.1u returns to the previous condition. Dot is shown 20 40 Dots are shown Tempo = 120 BPM Tempo =240 BPM ZOOM A2.1u 13 Editing a Patch The patches of the A2.1u can be freely edited by changing the effect parameter settings. Try editing the currently selected patch to create your own sound. Select the effect module Turn the Module selector to select the effect module to edit. The following settings are available. (5) (1) MODEL module (4) (6) (7) (2) MIC module (3) (3) COMP/LIMIT module (4) LO EQ module (2) (5) HI EQ module (1) (6) ZNR module (7) MOD/SFX module (8) DELAY/REVERB module (9) CONTROL module (10) GLOBAL module (8) (9) (10) When you set the Module selector to a position other than "PLAY", the A2.1u switches to edit mode, and the effect type currently selected for the respective module is shown. In edit mode, a dot appears in the bottom right of the display. Effect type MD Dot indicates that unit is in edit mode HINT You can switch to edit mode from play mode or manual mode. To switch an effect module on and off To switch the selected effect module between on and off, press one of the [W]/[Q] foot switches. When the module is off, the indication "oF" appears on the display. OF HINT CONTROL and GLOBAL are special modules that serve for making settings that affect the entire unit, such as selection of pedal operation. These modules cannot be switched on/off. 14 ZOOM A2.1u Editing a Patch Terminate the edit mode To terminate the edit mode and return to the play mode, set the Module selector to the "PLAY" position. A2.1u returns to play mode (or manual mode). NOTE When you select another patch after editing, the changes you have made in edit mode will be lost unless you store the patch first. To retain the changes, store the patch as described on page 16. Change the parameter value To change the setting value of effect parameters, use the parameter knobs 1 ­ 3. Which parameter is assigned to a knob depends on which effect module/effect type is selected ( p. 30 ­ 38). When you turn a parameter knob, the corresponding LED lights up and the display briefly shows the current value of the respective parameter. 55 NOTE When a module that is set to off is selected, the display shows "oF". Select the effect type To switch the effect type of the selected module, use the BANK [-]/[+] keys. NOTE · When you press the BANK [-]/[+] keys while a module is set to off, the module is switched on. · If you press the BANK [-]/[+] keys for a module that has only one effect type, nothing happens. SC ZOOM A2.1u 15 Storing/Copying Patches An edited patch can be stored in a bank of the user area (A ­ d). It is also possible to store an existing patch in another location to create a copy. In play mode, manual mode, or edit mode, press the [STORE] key. The bank and patch number are shown on the display as a flashing indication. A0 NOTE Patches of banks in the preset area (0 ­ 3) are read-only. No patches can be stored or copied into these locations. If you press the [STORE] key while a patch from the preset area is selected, the patch "A0" (bank A, patch number 0) will be selected automatically as default store/copy target. Select the store/copy target bank To select the store/copy target bank, use the BANK [-]/[+] keys. D0 NOTE Only a bank of the user area (A ­ d) can be selected as store/copy target bank. 16 ZOOM A2.1u Storing/Copying Patches To cancel the store process To cancel the store process, operate the Module selector before pressing the [STORE] key again (step ). Press the [STORE] key once more When the store/copy process is completed, the unit returns to the previous mode, with the target patch being selected. D4 Specify the store/copy target patch number To specify the store/copy target patch number, use the [W]/[Q] foot switches. D4 ZOOM A2.1u 17 Using the Built-in Expression Pedal The expression pedal on the top panel of the A2.1u lets you adjust effect parameters or the volume in real time during play, or alter the feedback control frequency. Which element is controlled by the pedal can be selected for each patch individually. Select the patch for which the expression pedal is to be used Select the element to be controlled by the expression pedal Press the [PEDAL ASSIGN] key to select the element to be controlled by the expression pedal. The row of LEDs above the key shows which element is currently selected. The respective selection is indicated as follows. · All LEDs are out The expression pedal has no effect. · VOLUME The expression pedal controls the volume for the entire patch. · TONE The expression pedal controls the TONE parameter of the MODEL module. · COMP/LIMIT, MOD/EFX, DELAY/REVERB The expression pedal controls a parameter from the respective module. · FEEDBACK FREQ The expression pedal controls the feedback control frequency. HINT · Which parameter will be changed by the expression pedal depends on the effect type selected for the respective module. For details, see pages 30 ­ 38. · You can select the pattern in which the parameter changes when COMP/LIMIT, TONE, MOD/EFX, or DELAY/REVERB is selected and the expression pedal is operated. For details, see page 37. · If the parameter or module assigned to the expression pedal is currently off, the LED flashes. In this case, operating the pedal has no effect. 18 ZOOM A2.1u Using the Built-in Expression Pedal Operate the pedal While playing your instrument, move the expression pedal up or down. Move up or down To switch a module on or off When you push the expression pedal fully down, the parameter or module selected with the [PEDAL ASSIGN] key will be switched between on and off. Push fully down HINT · When the expression pedal is assigned to the TONE parameter, the MODEL module can be switched on and off. · When the expression pedal is assigned to FEEDBACK FREQ, the feedback control function will be switched on and off. Store the patch as necessary The expression pedal setting can be stored for each patch individually. NOTE If you select another patch in play mode without storing the patch, any changes that you have made to the settings will be lost. ZOOM A2.1u 19 Using the Feedback Control The feedback control function of the A2.1u allows automatic or manual detection of the frequency range where acoustic feedback occurs. This frequency range is then attenuated to eliminate feedback. The feedback control function can be set in edit mode and can also be operated by foot switch or the built-in expression pedal. 2. Manual operation of feedback control This section describes how to detect the feedback frequency manually. Turn parameter knob 2 to set the feedback frequency, using the setting range from 1 ­ 30. The frequency range corresponding to the selected value will be cut. Select the value that yields best reduction of acoustic feedback (howling). 1. Set the Module selector to "GLOBAL". 30 3. When the GLOBAL module is selected, parameter knob 2 can be used to adjust the feedback control parameter (FEEDBACK FREQ). The following settings are available. oF When the setting is complete, return the Module selector to the "PLAY" position. This turns the feedback control function off. When this setting is selected, the foot switch can be used in play mode or manual mode to turn the function on and perform automatic detection of feedback frequency. When you assign Feedback Freq to the built-in expression pedal and press it fully down, the feedback control function will be activated, using a setting of "30". At HINT · If you select "At" in step 2, the automatic feedback frequency detection starts. During the process, the indication "SC" (Scan) is shown on the display. · The feedback control setting applies to all patches, and the most recent value is always active. There is no need to store the setting. Feedback frequency is detected automatically, and the respective range is attenuated. 1 ­ 30 This allows you to manually set the feedback frequency. Higher setting values correspond to higher frequency. 20 ZOOM A2.1u Using the Feedback Control foot switch to turn feedback control on. Automatic detection of feedback frequency The A2.1u can automatically detect the frequency range where acoustic feedback is occurring. If acoustic feedback should suddenly develop during a performance, you can simply hit the foot switch to turn the function on and suppress the feedback sound. This is possible both in play mode and manual mode. NOTE If no external foot switch is connected, automatic detection of feedback frequency in play mode is not possible. In manual mode 1. Refer to the section "Manual operation of feedback control" and set the FEEDBACK FREQ value to "oF" or "At". Press the [Q] foot switch to turn feedback control on. In either case, automatic feedback frequency detection starts when the function is turned on. The indication "SC" appears on the display. To repeat the automatic detection process, press the [Q] foot switch (in manual mode) or the external foot switch twice to turn the feedback control function first off and then on again. Automatic detection will then be performed once more. OF When you select the "oF" setting for the FEEDBACK FREQ value, the feedback control function is off, but it can be turned on by pressing the [Q] foot switch (in manual mode only) or an external foot switch. The setting will change to "At" and feedback frequency detection starts automatically. When you select the "At" setting, the feedback control function is on. In this condition, pressing the foot switch twice initiates automatic detection of feedback frequency. HINT In manual mode, you can change the FEEDBACK FREQ value by turning parameter knob 1. SC HINT · You can use built-in expression pedal to adjust the feedback control frequency with your foot (setting range 1 ­ 30). For details, see the following section. · For information about making foot switch or pedal settings, see pages 30 ­ 38. 2. To automatically detect the feedback frequency while playing your guitar, proceed as follows. In play mode Use an external foot switch (FS01) connected to the [CONTROL IN] jack. Set the function to be controlled by the foot switch to "Fb" (feedback control on/off) ( p. 25). Press the ZOOM A2.1u 21 Using the Feedback Control this condition is "30". Using the built-in expression pedal to operate the feedback control function The built-in expression pedal of the A2.1u can be used to switch the feedback control function on and off, and to adjust the feedback frequency. This is possible both in play mode and manual mode. Push fully down 1. Refer to the section "Manual operation of feedback control" and set the FEEDBACK FREQ value to "oF". 30 5. Operate the built-in expression pedal until you have found the position where feedback is suppressed most effectively. OF 2. Repeatedly press the [PEDAL ASSIGN] key until "FEEDBACK FREQ" is shown as control target for the built-in expression pedal. NOTE · The built-in expression pedal cannot be used to perform automatic detection of feedback frequency. · The above operation is possible only with the builtin expression pedal. The external expression pedal (FP01/FP02) can only be used as a volume pedal ( p. 25). In this condition, the built-in expression pedal can be used to switch the feedback control function on and off, and to adjust the feedback frequency. 3. Store the patch if necessary. The expression pedal setting can be stored for each patch individually. If acoustic feedback occurs while you are playing your instrument, push the built-in expression pedal fully down. When the built-in expression pedal is pushed fully down while the FEEDBACK FREQ parameter setting is "oF", the feedback control function will be turned on. The feedback frequency setting in 4. 22 ZOOM A2.1u Using Manual Mode The condition where the foot switches are used to switch the MOD/EFX module or the feedback control function on and off during play is called "manual mode". In play mode, select a patch. When you enter manual mode, the [W]/[Q] foot switches are assigned different functions and cannot be used to select patches. Therefore you should select the patch to use before entering manual mode. Press the [MANUAL] key. The [MANUAL] key lights up, and the A2.1u switches to manual mode. 1. 3. To switch feedback control between on and off, press the [Q] foot switch. The operation of the unit when the [Q] foot switch is pressed depends on feedback control setting value. oF 2. When you press the foot switch, the unit automatically detects the feedback frequency and attenuates it. Pressing the foot switch once more turns feedback control off. At Lit In manual mode, the switches and knobs on the panel function as follows. When you press the foot switch, the feedback control function is turned off. When you press the foot switch once more, the function is turned on again, the unit automatically detects the feedback frequency and attenuates it. 1 ­ 30 [W] foot switch Switches the MOD/EFX module on and off. [Q] foot switch Switches the feedback control function on and off. Each time you press the foot switch, the feedback control is switched back and forth between on and off. When it is on, the feedback frequency as specified by this numeric setting will be attenuated. 4. Parameter knob 1 Switches the feedback control function on/off and allows manual setting of feedback frequency. To switch the MOD/EFX module between on and off, press the [W] foot switch. 5. To return to play mode, press the [MANUAL] key. The [MANUAL] key goes out and the A2.1u returns to play mode. HINT · The other controls of the unit operate in the same way as in play mode. · In manual mode, you can also activate edit mode by turning the Module selector. Out ZOOM A2.1u 23 Other Functions This section describes how to use the internal expression pedal as well as an external pedal or foot switch. Use of the A2.1u as an audio interface or direct box is also explained. EU, Ed, EH, EL MOD/EFX module dU, dd, dH, dL DELAY/REVERB module Fb Feedback control frequency Making settings for the built-in expression pedal The expression pedal on the top panel of the A2.1u lets you adjust effect parameters or the volume in real time during play. It also can serve to adjust the feedback control frequency with your foot. Which element is controlled by the pedal can be selected for each patch individually. For information about parameters that can be controlled by expression pedal, see pages 30 ­ 38. HINT · The module to be controlled can also be selected with the [PEDAL ASSIGN] key ( p. 18). · Which parameter changes when the expression pedal is operated depends on the effect type selected for the module. For details, see pages 30 ­ 38. · When the COMP/LIMIT, TONE, MOD/EFX, or DELAY/REVERB module is selected, the pattern in which the parameter changes when the expression pedal is operated can be selected. For details, see page 37. 1. 2. Select the patch for which the expression pedal is to be used. Set the Module selector to "CONTROL". 4. If necessary, store the patch. The expression pedal setting is stored as part of the patch. Select the patch in play mode and operate the expression pedal. The selected function will be activated. When the A2.1u is in the bypass condition, the expression pedal always functions as a volume pedal, regardless of the setting made in step 3. 5. The A2.1u switches to edit mode, allowing you to make expression pedal and foot switch settings. 3. Turn parameter knob 1 to select one of the following modules or parameters to be controlled by the expression pedal. oF Adjusting the sensitivity of the built-in expression pedal The expression pedal of the A2.1u is adjusted for optimum operation at the factory, but sometimes, readjustment may be necessary. If the volume or sound does not change much also when the pedal is fully pushed down, or if it changes excessively even if the pedal is only lightly pushed, adjust the pedal as follows. Pedal is inactive. vL Volume CU, Cd, CH, CL COMP/LIMIT module tU, td, tH, tL TONE parameter (MODEL module) 24 ZOOM A2.1u Other Functions 1. Turn power to the A2.1u on while keeping the [PEDAL ASSIGN] key depressed. The indication "dn" appears on the display. Using an external expression pedal (FP01/ FP02) When you connect an optional expression pedal (FP01/FP02) to the [CONTROL IN] jack of the A2.1u, you can use that pedal as a volume pedal, separately from the built-in expression pedal. DN 2. With the expression pedal fully raised, press the [STORE] key. 1. Plug the cable from the external expression pedal into the [CONTROL IN] jack, and then turn the A2.1u on. 2. Operate the external expression pedal in play mode or edit mode. The volume changes. HINT The external expression pedal always functions as a volume pedal. The display indication changes to "UP". 3. Push the expression pedal fully down and then lift your foot off the pedal. Using a foot switch (FS01) Push strongly, so that pedal touches here. When foot is lifted, pedal returns slightly. Connecting an optional foot switch (FS01) to the [CONTROL IN] jack of the A2.1u allows bank switching in play mode. It is also possible to switch bypass/mute on and off, control the tap tempo function, or perform other functions with the foot switch. 1. 4. Press the [STORE] key once more. The expression pedal adjustment is completed, and the unit returns to play mode. HINT · The point where the module is switched on or off when the pedal is depressed is always the same, regardless of the action taken in step 3. · If "Er" appears on the display, repeat the procedure from step 2. Plug the cable from the FS01 into the [CONTROL IN] jack, and then turn the A2.1u on. Set the Module selector to the "CONTROL" position. 2. The A2.1u goes into edit mode. You can now make settings for the expression pedal or foot switch. ZOOM A2.1u 25