MiSTer audio has SCMS copy protection bit ON
Posted: Sun Jan 10, 2021 7:50 pm
I noticed that MiSTer emits S/PDIF audio frames with all status bits zero.
According to the specification this leads to SCMS copy protection enabled, original recording flag being off and audio being reported as 44.1kHz.
In my case this meant that my USB sound card was unable to capture the audio. After the changes as part of the pull-request this is now no problem.
I tested it also on the Sega Genesis core and I confirm it is now all working with no negative effect on my other devices (TV, monitor, HDMI switch, etc.).
I created a pull request on the GitHub to make this fix part of the template core system so that all cores can benefit.
According to the specification this leads to SCMS copy protection enabled, original recording flag being off and audio being reported as 44.1kHz.
In my case this meant that my USB sound card was unable to capture the audio. After the changes as part of the pull-request this is now no problem.
I tested it also on the Sega Genesis core and I confirm it is now all working with no negative effect on my other devices (TV, monitor, HDMI switch, etc.).
I created a pull request on the GitHub to make this fix part of the template core system so that all cores can benefit.