FYI: I've seen many people post about the Raspberry Pi over the last year. So I thought I'd point this out: http://www.linuxvoice.com/raspberry-pi-model-b/ >From a thread about the old models: Re: [pulseaudio-discuss] pulseaudio settop boxes On Sat, Feb 8, 2014 at 5:21 PM, Lauren?iu Nicola <lnicola at dend.ro> wrote: > Hi Wolfgang, > > First of all, I hope I won't offend anyone with this email, as it's not > really related to PulseAudio and I should probably have taken it > off-list. > > The complaints are usually related to the integrated sound card, which > uses PWM (although at a rather high frequency). I tried to use it only > once and, while I can't really comment on the audio quality, it seemed > to have a lot of interference: when the Pi was writing to the SD card, > there was a lot of audible noise. I'm using an USB DAC (sound card). > > Initially I was using ALSA, but the audio was choppy until I changed the > sampling rate to 44100 Hz. The USB support is not great on the Raspberry > Pi and there was a series of kernel changes intended to fix some > problems with keyboards or something like this. I'm running mine > headless, and those changes caused audio distortion for me, but luckily > they can be disabled from configuration. The Raspberry Pi also has I2S > support, which is a dedicated audio bus, supporting high sampling rates > and bit depths. There are some I2S sound cards available and the drivers > were recently merged into the kernel. > > Another series of problems was SD card corruption for me, as the Pi > would not boot anymore if I restarted it improperly (which happens quite > often because the power connector on mine is a bit finicky), but this > seems to happen less often with newer firmwares. > > As for PulseAudio, I'm using the RTP module with an application I wrote. > The CPU usage is rather high, but this is probably due to the resampler > (which is needed for RTP because of the clock skew). The rate estimation > algorithm seems to be a bit buggy: sometimes the buffer size grows too > much, at other times the audio gets choppy (although I find it weird > that I have to restart PA, not just the RTP session to fix it) and > sometimes it stops playing at all. However, I expect that these are > issues with the RTP module, not with the rest of PulseAudio. > > Basically, you can make it work and it's not that much of a hassle. > > Regards, > Laurentiu > > On Sat, Feb 8, 2014, at 23:00, hamann.w at t-online.de wrote: >> >> Hello, >> >> >> >> I'm not sure this is what you expect to get as an answer, but I'm using >> >> PulseAudio on a Raspberry Pi. It "mostly" works. >> >> >> >> Laurentiu >> >> >> >> Hi Laurentiu, >> >> I thought about something along these lines ... but I recall that people >> are complaining >> about the audio quality. Are you using the analog output? And what kind >> of >> obstacles does the "mostly" refer to? >> >> Regards >> Wolfgang >> >> _______________________________________________ >> pulseaudio-discuss mailing list >> pulseaudio-discuss at lists.freedesktop.org >> http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
