AMP3 + DSP produces loud noise

I just received my new AMP3 + DSP.  I updated my Pi2 to HBOS 20220726, mounted the AMP3 + DSP stack, booted and it worked.

A DSP program version 11 was installed and 12 was offered, so I installed version 12. After that I only get LOUD noise from the System.  :-/

I rebooted, installed the offered version 11, rebooted: LOAD noise.

It looks like the DSP programs offered in the menu (versions 11 and 12) are not compatible with the AMP3 + DSP stack.

Not surprisingly I can use the system when I remove the DSP. But that is obviously not what I want.


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