Bitwig with Renoise Redux on the master chain

[4tey]

Can I use Redux as a VST effect?

Can I use Redux as a VST insert in order to process audio coming from another instrument in a DAW solely for the sake of its DSP effects?

@dblue

No, but you should be able to route audio from your DAW into Redux via the sidechain/aux input, and then use a Line Input device in your Redux DSP chain to process the incoming audio.

Is that what you mean?