How to control the crusher with MIDI events in Live?
Problem: Normal audio tracks in Live don't receive MIDI events. Noramly the crusher is loaded as an audio effect in an audio track. So it can't be controlled via MIDI without a trick. Here is the solution:

Step 1 

Create a new project, select crusher in section plugin devices...

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Step 2

... and add it to an audio track.

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Step 3

Select MIDI track...

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Step 4

and select External Instrument in section Live Devices and add it to the MIDI track.

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Step 5

Go to the Ext. Instrument window. In the MIDI To section select the target Audio track and the target crusher effect:

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Step 6

Make sure MIDI will be received in Live by selecting your MIDI device.

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Step 7

Open crushers editor, press Parameter/MIDI button in Program panel to open Control Assignments. Send an MIDI event to Live and see the MIDI event appearing in the top/left section (Learn control). Turn a knop on the crushers editor and press Add to assign the control. Or do the following shortcut...

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Step 8

Rightclick on a element in the editor and  click Learn Controller. Then send a MIDI event to Live. The assignment will be automatically added to the Control Assignment List.

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