Have implemented the latest firmware upgrade?You should not have this issue IMO
It is like the processor , when changing channels, stop using the former audio format . Then , it is not able to set the new format ( that
may be the same ) . You have to go back and forth for the processor
to set the audio format.
Ask you dealer or communicate directly with McIntosh.
Go to McIntosh MX123 forum
https://www.avsforum.com/threads/the-official-mcintosh-mx123-a-v-processor-thread.3099788/
It is like the processor , when changing channels, stop using the former audio format . Then , it is not able to set the new format ( that
may be the same ) . You have to go back and forth for the processor
to set the audio format.
Ask you dealer or communicate directly with McIntosh.
Go to McIntosh MX123 forum
https://www.avsforum.com/threads/the-official-mcintosh-mx123-a-v-processor-thread.3099788/