This is a cycling of the Cantabile audio engine while the new song is configured. Seems like your audio interface drivers or one of your plugins don’t like that. To narrow it down, can you:
- test a manual cycling of the audio engine via the “power” button - switching it off and on again - do you get the same clipping sound?
- check with a different audio interface (if you have one) if the same sounds appear.
- test switching songs with a different set of plugins (some free ones I use regularly without any issues are Dexed (a free FM synth) or the Dead Duck Software plugin set) to check if it is one of your plugins misbehaving
This may help isolate the source of the issues - is it one of your plugins or the audio interface driver. In case of driver issues, it would be worth capturing a log file and sending it to @brad for analysis (see here on how to do that) - he has been able to resolve a lot of issues directly with hardware and software vendors in the past.
Cheers,
Torsten