Audio distortion (overdrive)

[Harpo S]

I've been using JamKazam successfully for 8 months.  Today it seems totally broken (not sure if its the new sw load that was pushed out).

As soon as I start a session in JamKazam (even a private session) my audio becomes severely distorted - as if overdriving the channel.

Equipment:
Alessis multi mix 4 USB mixer and a microphone.
Wired ethernet to router.
Fiber interent service.

Tried various JamKazam mix levels and can't make it go away (without reducing audio to zero).

Any ideas?

Allan