I'm not sure if this is a bug in Cakewalk, or if I'm doing something wrong.
I've got a project with various instrument tracks, including some drum instruments. I put a sonitus compressor on an instrument track and a send on a drum instrument track to the compressor sidechain, for some sidechain compression on the instrument. So far so good, everything works as expected. If I solo the instrument track, all I hear is the instrument track (with the volume ducking down where the drums would be sounding) but I don't hear the drum, or anything else.
But since I've got more than one drum instrument, I decide to send the drums to a bus, and put a send on the bus to the instrument's compressor sidechain. This is where things get weird. Now if I solo the instrument track with the compressor sidechain coming from the drum bus, I hear the instrument, and I also hear the drums (everything else mutes). This only happens on the track that's got the compressor sidechained to the drum bus send. If I solo a different instrument in the project, everything else mutes, including the drum bus, as expected.
I hope this is clear what the issue is. Is this a bug? Or is there a setting I need to adjust to make the bus behave as expected when I solo a track?
I'm able to reproduce the result, and I've attached a small cakewalk file that demonstrates this using only stock cakewalk plugins. Try soloing the epiano track and you'll see what I mean.
Odd Bus Solo Behavior.cwp