With 5.75, using Waves Plugins (a good example being H-Comp)
Reproduce:
- Create track
- Assign single channel input
- Add VST3: Waves H-Comp (Stereo)
- Either record and playback, or live monitor
Errant Behaviour:
Best case - Metering does not work, but sound is processed.
Worst case - Sound is not processed. (I have not experienced this, but I've heard reports of it)
Why fix?:
With some plugins that have a mono->stereo behaviour, things start to break when re-organizing effects. It appears to be necessary to sometimes switch out a Stereo wave effect for a Mono version, which is no fun.
Flavoured bagel with extra cream cheese:
I can replicate this in Windows 10 and macOS (el cap and higher).
This does not occur with Reaper 5.70.
Probably related to:
Code:
+ VST: inform VST3 plug-ins of multichannel context even if the plug-in does not adjust its I/O configuration in response
+ VST: prevent VST3 multichannel plug-ins from running in mono on stereo tracks [p=1945285]
^ Reporting here since it appears to have been introduced in 5.71/5.75