flatmax
commented
5 years ago What happens when you use S32_LE as the resolution ?
It is possible there is less CPU operations with S32_LE.
On 19/10/19 6:48 pm, Vasilis van Gemert wrote:
Yesterday I received my Stereo sound card.. I want to use it to pipe the input from a phono pre-amp to forked daapd https://github.com/ejurgensen/forked-daapd/. This works fine when I use
|arecord -f S16_LE -r 44100 -c 2 -t wav > /home/pi/music/pipe |
Forked daapd automatically picks up the pipe and plays it. This turned out to be much easier that I thought (-:
But when I try to get a higher resolution problems occur. For instance when I try to use S24_LE, I get continuous |"overrun!!! (at least 124.002 ms long)"| warnings. And it sounds like the world is exploding. I tried adding some buffer on the arecord side of the pipe (|-B 4000|, or |-B -4000|, not sure how this works exactly) but that doesn't seem to do much.
Now I am wondering where to look for a solution. Is it a write speed issue? Do I need a microSD card with faster write speed than the SanDisk Ultra 16GB I am using right now? I guess write speed doesn't count with a pipe. Or is it a processor thing? I run the Stereo card on a Raspberry Pi 3 Model B Plus Rev 1.3 with an up to date Raspbian Buster Lite. Would a Raspberry Pi 4 solve these issues? Should I try overclocking?
Or do I need to look in a completely different direction? In the end I would love to use a resolution of -f S24_LE -r 96000, but right now this seems way out of reach. Any tips and help are very much appreciated!
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vasilisvg
Yesterday I received my Stereo sound card.. I want to use it to pipe the input from a phono pre-amp to forked daapd. This works fine when I use
Forked daapd automatically picks up the pipe and plays it. This turned out to be much easier that I thought (-:
But when I try to get a higher resolution problems occur. For instance when I try to use S24_LE, I get continuous
"overrun!!! (at least 124.002 ms long)"warnings. And it sounds like the world is exploding. I tried adding some buffer on the arecord side of the pipe (-B 4000, or-B -4000, not sure how this works exactly) but that doesn't seem to do much.Now I am wondering where to look for a solution. Is it a write speed issue? Do I need a microSD card with faster write speed than the SanDisk Ultra 16GB I am using right now? I guess write speed doesn't count with a pipe. Or is it a processor thing? I run the Stereo card on a Raspberry Pi 3 Model B Plus Rev 1.3 with an up to date Raspbian Buster Lite. Would a Raspberry Pi 4 solve these issues? Should I try overclocking?
Or do I need to look in a completely different direction? In the end I would love to use a resolution of -f S24_LE -r 96000, but right now this seems way out of reach. Any tips and help are very much appreciated!