Owner’s Manual
FCC INFORMATION (U.S.A.) 1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product. not guarantee that interference will not occur in all installations.
IMPORTANT SAFETY INSTRUCTIONS INFORMATION RELATING TO PERSONAL INJURY, ELECTRICAL SHOCK, AND FIRE HAZARD POSSIBILITIES HAS BEEN INCLUDED IN THIS LIST. WARNING- When using any electrical or electronic product, basic precautions should always be followed. These precautions include, but are not limited to, the following: 1.
Owner’s Manual Thank you for purchasing the YAMAHA AG-Stomp Acoustic Guitar Pre-Amplifier. Before you use the AG-Stomp, we urge you to take the time and read this Owner’s Manual carefully in order to get the most out of the device’s many functions and to obtain maximum life. Also, after reading the manual, please keep it in a safe place for future reference. Contents Precautions .................................................. 5 External Control Settings .......................... 22 Nomenclature ....
Precautions • Avoid using the AG-Stomp in the following locations to prevent possible damage: • In direct sunlight or next to heating equipment. • In extremely cold or hot locations. • Locations exposed to high humidity or excessive dust. • Locations subject to strong shocks or vibration. • Before making any connections, make sure that the power is switched OFF on the AG-Stomp and any external devices.
Nomenclature ■ Top Panel Display & Main Section Effect Section Pre-Amplifier Section Footswitch Section ● Display & Main Section e MANUAL Button e r t q w y Independent of the selected patch’s settings, this button changes the tone to that produced by the settings determined by the current position of each of the knobs. The button’s lamp will flash if the patch’s setting is changed. Press the [MANUAL] and [UTILITY] buttons simultaneously to enter the External Control Setting Mode.
Nomenclature ● Pre-Amp Section !2 u i o !0 !1 !0 Tone Controls (BASS, MIDDLE, TREBLE, PRESENCE) u MIC TYPE Select Switch (MIC TYPE) Selects a microphone simulator type. In the Utility Mode, it is used to select functions you want to set such as Footswitch or MIDI Functions, etc. Controls the level of the knob’s related tone frequencies. When in the SHIFT mode, they set the variable center frequency of the related Tone Control.
Nomenclature !5 Feedback Reduction Buttons (FEEDBACK REDUCTION 1-5) !9 SPEED/TIME Control These switches are notch filters that are used to eliminate feedback. The five notch filters can be used to isolate and suppress those frequencies that are causing the feedback. The notch filter’s lamp will light when the corresponding band’s filter is active. Up to five notch filters can be used simultaneously. !6 Frequency Control (FREQ) Sets the frequency of the selected Feedback Reduction’s Notch Filter.
Nomenclature ■ Rear Panel @6 @7 @8 @9 #0 #1 #2 #3 #4 #6 #5 @6 Power Switch (STAND-BY ON/OFF) #2 EXP. PEDAL Jack This is the unit’s power switch. Connect a foot controller (expression pedal) (optional) such as the YAMAHA FC-7 to this jack and control individual parameter’s of the AG-Stomp. (→ page 22, 26) * To protect the speakers, always set the OUTPUT knob !1 to “0” before switching the power ON/OFF. @7 Power Adaptor Jack (AC IN 12V 1A) Connect the supplied power adaptor to this jack.
Connections Before making any connections to any of the AG-Stomp’s INPUT and/or OUTPUT jacks, make sure that the power on the AG-Stomp and all other devices is turned OFF to prevent electrical shock or damage to the devices. ■ Connecting the Power Use the supplied power adaptor (AC-10) to operate the AG-Stomp. OFF ( ) 1. Make sure the AG-Stomp’s Power Switch (STAND-BY) is in the OFF position ( ). 2. Connect the power adaptor’s plug to the AC IN jack on the AG-Stomp. 3.
Connections ■ Connecting Headphones ■ Connecting an EXP Pedal Connect a pair of headphones to the AG-Stomp’s PHONES jack (standard stereo) for monitoring the AG-Stomp while practicing privately. Use the OUTPUT knob to adjust the volume of the headphones. A foot controller (expression pedal) (optional), such as the YAMAHA FC-7, etc., connected to the AGStomp’s EXP. PEDAL jack allows control of individual parameters in the AG-Stomp.
Using the AG-Stomp First, connect your guitar to the AG-Stomp and try to get some sound. ■ Connecting the Guitar Before making any connections, make sure the AG-Stomp’s power is off, set the AG-Stomp’s OUTPUT knob to “0” and the +9V SUPPLY switch to “OFF”. Then connect the INPUT jack on the rear panel to the guitar’s output jack with any commercially available guitar cable (monaural ↔ monaural).
Using the AG-Stomp ■ Produce Sound ■ Editing Settings 1. After confirming that the OUTPUT knob is set to “0”, press the Power Switch (STAND-BY) ON ( ). The panel knob and button functions can be used to create your own original tone. Switching the Power Switch ON when the OUTPUT knob is turned up may result in damage to devices such as the amplifier, speaker, headphones, etc., or cause unexpected accidents like damage to your hearing due to high volume settings. 2. “U01” will appear in the display.
Using the AG-Stomp The previously described rules apply to all knobs except the OUTPUT knob. The MIC TYPE SELECT switch also functions in the same manner. When the knob is rotated, the Mic Simulator type that is set in the patch data will flash in the display. After rotating the knob to the position of the Mic Simulator type indicated in the display, select the Mic Simulator type you want to use.
Using the AG-Stomp ● Setting the Mic Simulator The Mic Simulator is a specially designed circuit that adds to an electric/acoustic guitar, the special characteristics created when miking an acoustic guitar. It adds the airiness, which is found when a microphone is placed in front of the guitar’s sound hole. The Mic Simulator is useful when your guitar is connected directly to a mixer or recorder via a line, or when listened to through a pair of headphones for practice, etc.
Using the AG-Stomp ● Feedback Reduction The AG-Stomp is equipped with a Feedback Reduction Function to prevent feedback. Feedback is caused when a certain frequency or frequencies of the amplified sound causes the guitar to resonate thereby being re-amplified until a steady howl or whistle is heard. The AG-Stomp prevents feedback from occurring by means of a notch filter, which is used to cut the problem frequency.
Using the AG-Stomp ■ Selecting Patches The AG-Stomp holds a total of 60 patch programs (patch) in its internal memory. The 60 patches are divided into two areas, ten banks and three patches. • AREA There are two areas, the USER AREA and the PRESET AREA. Data in the USER AREA (30 patches) can be freely rewritten using the STORE operation. Data in the PRESET AREA (30 patches) can be edited but the contents can not be rewritten to PRESET AREA memory.
Using the AG-Stomp ● Using the Footswitches and Bank Switch • Press a Footswitch (1-3) to select the corresponding patch number 1-3 in the currently selected bank. * If the Footswitch’s function is set to “EFF” in the Utility Mode, it will not be possible to directly select a patch with the Footswitch. (→ page 24) • Press and hold the BANK switch until the display and the footswitch lamp flashes (Bank Select Mode), then remove your foot from the switch.
Using the AG-Stomp ■ Storing Patches ■ Other Convenient Functions After editing or creating an original patch, your settings can be stored in the USER AREA (U01-U93). Try creating an original patch and store it. Here are some other convenient functions that you can use with the AG-Stomp. ● Storing Procedure 1. Press the [STORE] button. When the Store Mode is entered, the display, the STORE lamp and the Footswitch lamp that corresponds to the patch number will flash. 2.
Using the AG-Stomp ● Using the AG-Stomp Without Patches ● Chromatic Auto Tuner Function The [MANUAL] button gives you direct control of the AG-Stomp’s parameters and effects when patches are not used. Press the [MANUAL] button to enter the Manual Mode (the lamp will light).
Effect Functions and Parameters Limiter ● LIMITER The Limiter prevents the input signal from exceeding a preset level (peak). • LEVEL Knob Rotate the knob to the right to increase the amount of the Limiter’s effect. When set to “0.0”, the Limiter will have no effect. Feedback Reduction The AG-Stomp provides a total of five Notch Filter circuits that can be used to control specified frequencies.
External Control Settings A foot controller (expression pedal) (optional), such as the YAMAHA FC-7, connected to the AG-Stomp’s EXP. PEDAL jack lets you control the volume and tone of the AG-Stomp and effect parameters (setting values). These same parameters can also be controlled with MIDI control changes. * In the following section, the abbreviation [FR 1] button refers to the [FEEDBACK REDUCTION 1] button, etc. ■ Procedure 1. In the Play Mode, press the [MANUAL] and [UTILITY] buttons simultaneously.
Tuner Mode This mode is used for tuning your guitar. In the Tuner Mode, the AG-Stomp operates like a chromatic auto tuner. ■ Enter the Tuner Mode To enter the Tuner Mode, use any one of the three methods described below. • In the Play Mode, press the [UTILITY] and [STORE] buttons simultaneously. • In the Play Mode, hold the BANK switch until “tu” appears in the display. (The Tuner Mode comes after the Bank Select Mode.) • In the Bank Select Mode, hold the BANK switch until “tu” appears in the display.
Utility Mode The Utility Mode is used for the AG-Stomp’s overall system settings for things such as the footswitch, MIDI, external controllers, EXP. PEDAL jack, etc. * In the following section, the abbreviation [FR 1] button refers to the [FEEDBACK REDUCTION 1] button, etc. ■ About the Utility Mode When in the Play Mode, press the [UTILITY] button to enter the Utility Mode (the lamp lights). When in the Utility Mode, press the [UTILITY] button to return to the Play Mode (the lamp turns off).
Utility Mode Press the [LIMITER] button to set the receiving MIDI PRG No. Use the [UP]/[DOWN] buttons to select the number. • 1-128 : MIDI Program Change No. Press the [FR 1] button to set the AG-Stomp’s patch number. Just as in selecting a patch number in the Play Mode, use the [UP]/[DOWN] buttons or the Footswitches to select. • U01-U93, P01-P93 : The patch number that is recalled.
Utility Mode carry out the MIDI Bulk Out operation with a single patch. * After transmitting the data, the device will return to its previous condition, ready to select another patch number. ● Set the External Control Number Press the [FR 1] button and use the [UP]/[DOWN] buttons to set a control number (1-8). * Refer to the “External Control Settings” section (page 22).
Utility Mode ● Set the Maximum Value of the EXP. Pedal Sets the maximum value that indicates the position of the EXP. Pedal. Press the [FR 1] button and use the [UP]/[DOWN] buttons to set the position (127-255). You can also hold the [FR 1] button and move the EXP. Pedal to set the position. * Due to the relationship between the maximum and minimum value, a value which results in a practical range of less than 128 can not be used. * The value can not be set greater than that of the EXP.
Error Messages If an error occurs during operation, one of the following error message numbers will appear in the display. Stop operation of the AG-Stomp and follow one of the solutions described below. E1: MIDI Receive Buffer Full CAUSE: Too much MIDI data is being received and the buffer is full SOLUTION: Try reducing the amount of data being sent, or break the data into smaller blocks. E2: Communication Error CAUSE: An abnormality is detected during MIDI communications.
Specifications Digital Section • • • • Full Digital Signal Processing Mic Simulator: 8 Types Feedback Reduction: 5-band Digital Effects • Limiter • Digital Chorus, Digital Delay • Hall Reverb, Room Reverb, Plate Reverb • External Controller Function (EXP Pedal/MIDI): 8 Controllers/Parameters • Tuner Function (Chromatic, Auto) MIDI Functions Receive: Program Change (Program Change Table can be created), Control Change, Bulk In Transmit: Program Change, Control Change, Bulk Out, Merge Out Connections INPUT
[ Acoustic Guitar Pre Amplifier ] Date:1-May-2001 Model AG stomp MIDI Implementation Chart Version : 1.0 +----------------------------------------------------------------------+ : : Transmitted : Recognized : Remarks : : Function ...
: : : : : : : : : : : : : : : : : : : : : : : : : :-------------------+----------------+----------------+----------------: :Prog : o 0 - 127 : o 0 - 127 : : :Change : True # : ************** : : : :-------------------+----------------+----------------+----------------: :System Exclusive : o : o : Bulk Dump : :-------------------+----------------+----------------+----------------: :System : Song Pos. : x : x : : : : Song Sel.
V698590 Printed in Taiwan