Hi Paul

I have used the alsamixer settings from aiy raspbian build and used on my rpi zero w running PCP 6 rc1 and it works great, stereo on headphones and speakers.

Here is the dropbox link to a Excel file with the settings.

https://www.dropbox.com/s/kmr0x0jjzf...lues.xlsx?dl=0

Hope this helps someone else

Greg Frye