That's correct. It is a multi-channel audio file. You referred to one of the channels being "muted." In the previous version, when I wanted Channel 0 to be inaudible, I simply used the slider and moved it as far left as possible. I'm doing the same in 4.17. Is this what you're calling "muting"? It'd be great if there was a "mute this channel" button!
In 4.17, the slider holds the position to which I moved it, yet when I stop the audio and then either hit Play or Rewind/Play to resume the audio, both channels are audible. There were rare occasions during a several-hour period of time when Channel 0 would remain muted, but I could not detect any rhyme or reason as to why it did at those times and would not remain muted the majority of the time.
I learned from a colleague that she had the exact same problem with the new version. Both of us have reinstalled an older version just to be able to get our work done, even though in my file, the sound quality is remarkably inferior. I'd love to be able to use the new version, but it's not an option for me unless I can get this problem resolved.
Thank you for any recommendations.
Jaycee