<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>I had some free time today so I decided to test some more things:</span></div><div><br><span></span></div><div><span>When playing a high resolution (say 24bit/96kHz) PCM WAV file using "aplay -v -Dhw:0,0 highresfile.wav"</span></div><div><span>I can reproduce the same glitches on the very beginning of playback. Stdout doesn't show any errors and playback is</span></div><div><span>fine after the initial glitches.</span></div><div><br><span></span></div><div><span>When I use the Arcam rDAC with a MacBook Pro and e.g. Fidelia (with automatic sample rate switching enabled)</span></div><div><span>I get no such glitches, though it seems that Fidelia when in paused or stopped state is sending silence to the sound card</span></div><div><span>at a fixed resolution; I cannot confirm that technically however apart from my Marantz
DAC acting as if there was input.</span></div><div><br><span></span></div><div><span>Thus it currently seems to me that the glitches have something to do with the way snd-usb-audio communicates with the</span></div><div><span>Arcam rDAC. I could get rid of the glitches if I could get MPD to play silence when paused or stopped</span><span> instead of ending <br></span></div><div><span>the stream to the sound card. Does anyone know how to make MPD do that? Or anyone other way to fix the described issue?<br></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> John Mayer <sik_lescinovid@yahoo.com><br> <b><span style="font-weight: bold;">To:</span></b> "voyage-linux@list.voyage.hk"
<voyage-linux@voyage.hk> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, January 20, 2012 12:05 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [Voyage-linux] Glitches on Playback Start/Resume with Arcam rDAC and Voyage MPD 0.8<br> </font> </div> <br>
<div id="yiv1170006912"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:12pt;"><div>Hi,</div><div><br></div><div>I'm having curious issues running Voyage MPD 0.8 on a Compaq Mini 110c-1100dx netbook connected to an Arcam rDAC via USB.</div><div>Whenever I resume playback of a FLAC file from a stopped or paused state there are loud glitches at the very beginning</div><div>of playback lasting for at most a second. They seem to be most frequent with high resolution files and most prominent with files that have</div><div>little to no silence at the beginning. Additionally my kernel log always shows a message of the type "2:1:1: cannot get freq at ep 0x1" when I</div><div>start or resume playback of any file. I have also tried playing music from an attached USB harddrive and from the internal one, the glitches were</div><div>present both times.</div><div><br></div><div>Finally I want to mention
that once a file
is playing it plays without any glitches whatsoever. Also when I have multiple files, of different bit/sample rate even,</div><div>in a playlist and I switch from one playing file to another there are no glitches. The glitches only seem to appear when the sound card is moved form an idle state</div><div>into a playing one.</div><div><br></div><div>Does anyone have any ideas what the reason for this might be, or at least a possible solution to getting rid of the glitches?</div></div></div></div><br>_______________________________________________<br>Voyage-linux mailing list<br><a ymailto="mailto:Voyage-linux@list.voyage.hk" href="mailto:Voyage-linux@list.voyage.hk">Voyage-linux@list.voyage.hk</a><br><a href="http://list.voyage.hk/mailman/listinfo/voyage-linux" target="_blank">http://list.voyage.hk/mailman/listinfo/voyage-linux</a><br><br><br> </div> </div> </div></body></html>