Return Jacks; Calibrating The Expression Pedal - Boss ME-90 Reference Manual

Connecting to and using an external
effect unit via the SEND/RETURN jacks
You can connect an external effect unit between the SEND jack and
RETURN jack, and use it as one of the ME-90's effect units.
To do this, connect the SEND jack to output the ME-90's sound to the
input of your effect unit. Connect the output of the external effect
unit to the RETURN jack (input) of the ME-90.
You can change the SEND/RETURN insertion point and the footswitch
on/off function in the system settings (p. 16). Using the factory
setting, the SEND/RETURN is inserted before the preamp in the signal
chain (ON). If an external effect unit is not connected to the RETURN
jack, no sound is output from the SEND jack.
MEMO
¹ Hold down the [EDIT] button and press the [CTL] pedal to toggle
SEND/RETURN on/off.
¹ You can store the SEND/RETURN on/off state for each patch.
Display Setting
Off
0
On
1

Calibrating the expression pedal

Although the ME-90's expression pedal has been set for optimum
operation at the factory, extended use and the operating
environment can result in the pedal going out of adjustment.
If you experience issues such as the expression pedal switch not
responding or not being able to fully minimize the sound with the
volume pedal, calibrate the expression pedal.
1 .
Press the [MEMORY/MANUAL] pedal to switch to
manual mode (p. 6).
2 .
Hold down the [CTL] button and press the [DELAY]
pedal.
The display indicates "Pd" -> "Up".
3 .
Press down on the heel end of the expression
pedal and take your foot off, and press the [WRITE]
button.
dn is shown on the display.
4 .
Press the toe end of the expression pedal and take
your foot off, and press the [WRITE] button.
The responsiveness (sensitivity) of the current expression pedal
switch is shown in the display.
Value: 1–9
MEMO
In steps 3 and 4, press the [WRITE] button while the pedal is not
fully pressed either with your toe or with your heel. The display
starts blinking. Then, press the pedal up to maximum position
with your toes and press the [WRITE] button.
5 .
Use the [BANKÉ] and [BANKÇ] pedals to adjust
the responsiveness (sensitivity) of the expression
pedal switch.
Lower values make the pedal switch more responsive (lighter).
6 .
Press the [WRITE] button.
The settings are saved.
Useful functions
11