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On Sat, 22 May 2021 at 00:51, Mark Knecht <markknecht@×××××.com> wrote: |
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> OK, so what does alsamixer tell you? On my system I hit F6, choose the card and then F3 for Playback. I see the 7 channels. Hitting 'M' changes the mute setting but all the volumes are at 0 and hitting '+' doesn't raise the volume. It's been so long since I looked at spdif stuff that I don't remember if spdif supports volume this way. Will research a bit. |
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Yeah, I see exactly the same. The first one, I think, was muted |
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originally, but I unmuted all of these when I originally started |
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trying to figure this out, before my first mail to this list. I can't |
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be 100% sure, but I think the first one was the only one that was |
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muted. Output from amixer and aplay and others make me think that this |
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first one, is the one 'aplay -l' marks as device 3, and as the TV. |
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Unmuting didn't change anything though, and when I went to check again |
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now, all 7 channels are unmuted. |
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> The problem right now is we don't know if the channel is transmitting at a volume of 0, not transmitting at all, or possibly the TV is receiving audio data but not accepting it due to format issues. |
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Indeed. If I am indeed transmitting anything (at least aplay actually |
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plays the sample file in real-time, so something is getting |
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processed), how could I even figure out what the TV is doing about it. |
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I'm starting to collect good reasons for replacing this aging 10+ year |
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old TV :) |
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> I see a response from eric so I would certainly look into what he's pointing you toward. |
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Eric's links were very interesting, and the pi people's solution |
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seemed to be something simple, but their fix seems to also be in |
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firmware, with a link to a giant, mostly binary, git commit. It made |
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me think, though, if there was something in my kernel config that |
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could be stopping the sound from getting through though, so that will |
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be my next direction of inquiry. If this TV required something special |
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in the pi firmware, maybe that is something I've managed to exclude |
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from my own build. |
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Cheers, |
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Arve |
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