I was wrong You're right, it's not possible at the moment. I thought it was. But I did it with buses with an equal channel count as described in https://sourceforge.net/p/qtractor/wiki/How%20To%20-%206%20Alternative%20Sidechain%20Workflow%20with%20Aux%20Sends/ Reply
You're right, it's not possible at the moment. I thought it was. But I did it with buses with an equal channel count as described in https://sourceforge.net/p/qtractor/wiki/How%20To%20-%206%20Alternative%20Sidechain%20Workflow%20with%20Aux%20Sends/