Preview audio in Logic or Pro Tools when transport stopped?

[ttg]

With Logic… No solution. Except ARA maybe and that’s currently isn’t universal binary…
Hint hint… You already discussed that…

Is there a way to allow audio out when the transport is not running, but also allow audio in?

We have a desire to allow “previewing” audio (notes on an on-screen keyboard the user can click on) in a plugin that also needs to take audio input (in all hosts). Is there any way to do that? We’ve found that some hosts won’t call our processBlock() function unless the transport is running. (ProTools, for example, stops calling it a few seconds after the transport is stopped.) I know an Instrument would let us generate tones, but a number of hosts don’t feed audio to Instrument plugins, since t…

For Pro Tools, there’s and also vst3 there’s a flag you can ask the host to not optimize your audio plug-in.