Chapter Five: Midi; Midi Program Change; Setting The Midi Channel; Soft" Midi Thru - Alesis Akira Reference Manual

Alesis akira audio-digital processor: reference guide
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MIDI
5

MIDI Program Change

You can change programs on the Akira from external source
via MIDI. Make sure that there is a MIDI cable patched from
the MIDI Out of your source (controller) device to the MIDI
In of the Akira. The Akira will then change programs every
time a program change command is sent from the source
device.

Setting the MIDI Channel

In order for the Akira to receive MIDI program changes, it
must be set to the same MIDI channel as the source device. To
set the Akira's MIDI channel, press the MIDI button. The
display will then show the Akira's current MIDI channel. Use
the VALUE buttons to change the Akira's MIDI channel to
match your source device. A setting of "0" puts the Akira into
MIDI Omni Mode where it will responds to program changes
received on any of the 16 MIDI channels. For any other
setting, the Akira will only respond to program change
commands on the particular chosen channel.

"Soft" MIDI Thru

The Akira's MIDI Out serves double duty as a MIDI Thru
port. If you have additional devices to which you want to send
program changes, you can connect the MIDI Out of the Akira
to the MIDI In of the "downstream" device.
However, since the Akira's MIDI Thru data is combined with
its MIDI Out data, it is preferable to position the Akira as the
last unit in the MIDI chain as small delays can occur due to the
software merging of these ports. You should avoid positioning
time-sensitive devices such as synthesizers or drum modules
downstream of the Akira to avoid any noticeable MIDI delay.
Also, since the Akira's software Thru function is combined
with its MIDI Out, you should avoid simultaneously
connecting the Akira's MIDI In and Out to your computer or
other MIDI device that has a MIDI Echo or Patch Thru
function. This configuration can cause a MIDI loop which will
cause the Akira to behave erratically.
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