Alesis 15 Musical Instrument Amplifier User Manual


 
9
Bypassing the effects
To bypass the effects section entirely, hold down both the Program Up and Program
Down buttons – or press both footswitches – for less than half a second. The screen will
read by (
) to indicate that the effects have been bypassed.
You may now control the amplifier’s volume with the volume knob. Turning any other
knob restores the effects.
Using the built-in tuner
Press both the Program Up and Program Down buttons – or press both footswitches
at the same time – for more than half a second to enter both Bypass and Mute mode.
Play the open string you wish to tune. Use the following guide when tuning:
Tuning to a pitch other than A=440
If you turn the VALUE knob while using the tuner, the display shows you the setting for the
Coolfire’s pitch reference, which is set to 440Hz (shown as ) for the A note above middle
C. The possible range of values for this setting is 35 to 45, which represents 435Hz to 445Hz.
When you turn the Coolfire on and off again, the reference pitch is reset to 440Hz.
V
isual Guide to Tuning
The bottom four segments
rotate counterclockwise if pitch
is low. The top four rotate
clockwise if pitch is high. An 8
means pitch is in tune.
High
In tune
= no pitch detected
The twelve possible
pitches (a decimal point
indicates a sharp):
Lo
w