MID, Mix Mode, and MULTITIMBRAL SEQUENCING
This is part of my exploration of the Andromeda synth.
It's a wonderful synthesizer, which even after owning it for over 5 years I'm still just scratching the surface of what it can do.
The official manual is really long (as you'd expect) from such a complex synth, so this is my attempt to break things down, into smaller parts for myself. If this helps someone else, that great too.
I'll constantly add to these posts as I discover more about this wonderful instrument.
The other parts are here:
+ Andromeda A6 - Alesis Part 4 - Filters, the post filter mixer
Midi Clock
The A6 sends and receives MIDI Timing Clock.
This is usually found only on time-based devices like a sequencer or a
drum machine.
But since the A6 has step sequencing and an arpeggiator it can control other rhythm-type units
or be controlled from an external
MIDI source.
The Andromeda is capable of sending and receiving on up to 16 MIDI channels
simultaneously.
Mix Mode is used for this kind of MIDI application.
It is possible for
the A6 to assign any Mix Channel to any MIDI channel if desired.
In Program Mode, the A6 sends
and receives on a single MIDI channel at a time.
in
Program Mode you can play only one Program at a time,
In Mix Mode you can play
up to 16 Programs at once, either from the keyboard
(as layers or splits) or from an
external sequencer.
Or, you can have several different programs on different Mix Channels responding
to the same MIDI channel. This means that if
you want to play a layer of several Programs, you don’t have to clog the MIDI
sequencer with duplicate tracks and messages.
Mix Mode
Use this mode if you wish to send & receive MIDI on up to 16 channels.
Each Mix channel can be assigned to a specific MIDI Channel
with unique MIDI controller assignments. 
Pressing the MIX button displays the Mix mode display screen. 
The page tabs under mix mode are:
The row of rectangular buttons just below the display area are used to select the
Programs within a Mix. When a Mix Channel is ON, its associated LED will light.
When a Mix Channel is currently selected for editing in the display, its LED will
blink.
Pressing the MIX button displays the Mix mode display screen.
MIX
MIXDIR
KBD
PROG
CNTL
SOLO
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Page 244 of manual
The easiest way to use the A6 with a MIDI sequencer is to use one of the preprogrammed Mixes in the Preset or User banks.
See the Program/Mix chart for the
Mix set up for multitimbral use that’s appropriate for your situation.
But if you want to start from scratch or edit an existing Mix, here are the steps:
1. Press the MIX button.
2. Select a Mix to start with using the PROGRAM GROUP/NUMBER, and BANK keys.
3. Select Mix Channel 1 by pressing the black MIX SELECT 1/9 key.
Make sure the right side of the display window has a box that says MIX CHAN 1.
If it
says MIX CHN 9, press the SHIFT key and press MIX SELECT 1/9 again.
4. If the green LED above the MIX SELECT key isn’t flashing, press it again to enable
the channel.
A small box in the display should say ON and an arrow appear pointing to the
current
Mix Channel. The flashing LED above the switch means the Mix Channel
is currently
selected for editing and is ON.
Set the Keyboard parameters
5. Press soft button 5 (KBD).
6. If you want to play this mix channel from the keyboard*, make sure that
ENABLE
is set to ON using soft knob 4.
Set the high and low ranges using soft knobs 1
and 2
Set the MIDI parameters
7. Press soft button 6 (PROG).
8. Set the MIDI channel for this Mix Channel by turning soft knob 6 (MIDICH).
9. Press soft button 7 (CNTL). If the first parameter isn’t MID IN , press it again.
Set
MID IN to ON using soft knob 1.
10. If you’re going to be using this Mix Channel to send note messages to
the
sequencer*, set MIDOUT (soft knob 2) to ON.
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