I implemented the FM feedback algorithm described here by acreil: https://forum.pdpatchrepo.info/topic/6185/feedback-fm-algorithm/10

On my Raspberry Pi 2 setup running Jack in real-time mode, Pd 0.35 handled it fine.

Updating to Pd 0.48, it pegs the cpu meter and the sound is garbled, until I remove the feedback part.

Any ideas?

! john