11
Easy to Use Functions

MIDI commands can be used to select memory numbers, control the reverb, tremolo, chorus and tape echo effects, and control

volume on the DG amplifier. A speaker simulator can also be applied to the LINE OUT signal.

What is MIDI? MIDI is the acronym for Musical Instruments Digital Interface. MIDI is a world-wide standard communication interface

that allows MIDI compatible musical instruments, computers and other MIDI devices to share musical information and

control one another regardless of instrument type or maker.

■Using MIDI to Recall Memory

Program changes sent from a Yamaha MIDI Foot Controller MFC10, etc., or
an external MIDI device can be used to recall settings in the DG amplifier’s
memory.
1. With a MIDI cable, connect the DG amplifier’s MIDI IN jack to the
MIDI OUT jack on an external MIDI device.
* Use only a standard MIDI cable that is less than 15 meters in length. Use of a
longer cable may result in abnormal operation.
STATUS
DATA/CTRLBANK MSB/MAX
BANK LSB/MIN
TOGGLE ON-OFF
/NUMBER OF PGM DEC
/NO INC
/YES MEMORY
EDIT PC
EDIT WRITE
/EXIT
±10
8.8.8
.
1. Using procedures 1. and 2. in the previous “MIDI Memory Recall”
section, connect the external MIDI device and set the MIDI receive
channel.
2. Next, select the volume control position.
→For instructions on the setting procedure, refer to page 13 “Set the
Volume Pedal Position”.
3. In this condition, number 7 control change data transmitted from
an external MIDI device will now control the DG amplifier’s volume.
* The DG amplifier does not except MIDI control changes other than numbers
7 and 91 to 94.
* For more information on transmitting control data, refer to your external
MIDI device’s owner’s manual.
* Even if another memory number is selected, main volume data will not change.
* When the power is switched ON, main volume data is set to its maximum
level.
* After the main volume data is changed, and the external MIDI device is
disconnected, the volume level may be insufficient. In this case, transmit the
volume change again or, turn the power OFF and then ON again.

■Controlling Reverb, Tremolo, Chorus and

Tape Echo via MIDI

You can adjust the Reverb Level (No. 91), Tremolo Depth (No. 92), Chorus
Level (No. 93) and Tape Echo Level (No. 94) settings by transmitting control
change messages from an external MIDI device’s MIDI OUT jack to the DG
Guitar Amp’s MIDI IN jack.
1. Connect an external MIDI device as described steps 1 and 2 of the
“Using MIDI to Recall Memory” section on this page and set the
MIDI receive channel.
2. Transmit the parameter control change number and control change
data from the external MIDI device and you can control the effect
parameters listed above.
* For further information regarding the transmission of control change data,
refer to your external MIDI device’s owner’s manual.

■Speaker Simulator

The DG amplifier’s speaker simulator provides the line signal with a realistic
simulation of the natural sound of a speaker. The speaker simulator can be
used on the line signal when the LINE OUT jack is connected to a mixer or
recorder.
→For setting instructions, refer to the “Speaker Simulator ON/OFF”
section in this manual.

DG amplifier

Rear Panel

MIDI Cable

External MIDI Device

MIDI IN MIDI OUT

2. Set the DG amplifier’s MIDI receive channel and the MIDI transmit
channel on the external device to the same MIDI channel number
(the factory preset channel number is 1).
→For setting instructions see page 12 “Set the MIDI Receive Chan-
nel”.
3. Create a program change table*1. (The factory preset is, program
change number = memory number).
→For setting instructions see page 12 “Creating a Program Change
Table”.
*1For example, “the received program change number 1, recalls the DG
amplifier’s memory number 5”. To achieve this, the r eceived pr ogram chang e
number must be assigned to the corresponding memory number.
4. When program memory data is transmitted from an external MIDI
device, data in the corresponding memory assigned to the program
change table will be recalled.
* For instructions on how to transmit program change data, check the owner’s
manual of the external MIDI device you are using.

■Using MIDI to Control Volume

You can control the DG amplifier’s overall volume from an external MIDI
device using a number 7 control change message (main volume) sent from
the MIDI OUT jack of an external MIDI device to the DG amplifier’s MIDI IN
jack. By connecting a Yamaha MIDI Foot Controller MFC10, etc., or a MIDI
device equipped with a foot pedal, you can use the foot pedal to control the
volume during performance. Using the following three positions, you can
select the control position as to where the volume is changed.
•“bP” : Before Pre Amp. Controls the volume before the preamp.
•“AP” : After Pre Amp. Controls the volume after the preamp.
•“Ar” : After REVERB: Controls the volume after the reverb.

INPUT SPEAKER

LINE OUT

Power Amp
bP
Pre Amp Reverb
AP Ar
DG100-212A/DG80-210A/DG80-112A/DG130HA