FabFilter User Forum
Pro Q4 bug
My ProQ4 is having a super annoying bug where any channel that has a Pro Q4 loaded does not play after changing audio interfaces, or sometimes restarting the project. The problem is easily solved by turning toggling the on/off button on the Q4. However, when you have many Q4s loaded, toggling each one becomes hugely annoying.
Please help!
Andrew
Andrew — May 22, 2025
Hi Andrew,
Can you elaborate on this issue? What OS version, DAW version, etc? What type of interfaces do you switch? Do you hot-swap them in the middle of a session or is the DAW closed when you swap them?