[Musicpd-dev-team] DSD playback issues
HI all - I've been testing MPD with various DSD DACs lately and have come across one issue that appears to be related to DSD support for DoP in MPD. At the end of DSD files, there is often a very loud pop (very disconcerting). When testing the same DAC with ASIO drivers in Windows, this does not take place. So far, I have tested playback of two DACs in particular, the Auralic Vega and the Mytek DSD DAC. At this point, the Mytek DAC does not appear to be able to play DSD128 files (although it does with the Mytek ASIO driver). I think this is related to the Mytek's firmware. The Auralic DAC uses a modified XMOS USB interface and can play both DSD64 and DSD128 files. But there is a loud pop at the end of DSD files with this DAC. The Mytek also produces a pop, but nowhere near as loud as the pop as the Vega. Often after this pop, the Vega appears to lose sync somehow. MPD continues to stream to it, but there is no sound and the Vega no longer displays the file resolution. The solution is to re-boot the Vega and begin playback again. I noticed that JRiver under windows has an option to set the volume at the end of a DSD file to zero in order to avoid clicks. Obviously, since the Vega does not produce this loud pop at the end of a DSD file, they have done something in their ASIO implementation. I'm interested to know if this issue can be addressed with MPD/ALSA or if it is simply not yet ready for prime time where DSD playback is concerned. Thanks for any input you might offer. - Jim -- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911iu=/4140/ostg.clktrk___ Musicpd-dev-team mailing list Musicpd-dev-team@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/musicpd-dev-team
Re: [Musicpd-dev-team] DSD playback issues
Hi, Hi Jurgen and all, I am the lead developer of Voyage MPD and I experience the same issue (hang at the end of playing) when replaying the .dff files downloaded from 2l.no. More specifically, the mpd process consume 100% of a single core. If I convert those problematic files to .dsf using Korg AudioGate, the problem resolved. Did others experience the same? I would like to see this fix or if anyone have pointer to aid me look into I, I can help. I have noticed these problems with some DFF files. As soon as I can find some time I'll investigate and report back. Jurgen -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr ___ Musicpd-dev-team mailing list Musicpd-dev-team@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/musicpd-dev-team
Re: [Musicpd-dev-team] DSD playback issues
HI all - As a follow-up, I ran the following tests on an Alix 2 board running Voyage MPD 0.9 rc2 into an Auralic Vega DSD DAC. I downloaded the following file from 2L: http://www.lindberg.no/hires/test/DSD128/2L-038_stereo-DSD128_01.zip This is a DSD128 5.6 MHz .dff file. I used Korg Audiogate to re-write the file in the following formats: 5.6 MHz (DSD128) .dff file (I re-wrote it to insure the file from 2L was formatted correctly). 2.8 MHz (DSD64) .dff file 5.6 MHz (DSD128) .dsf file 2.8 MHz (DSD64) .dsf file All files played with mixed results. The Vega display correctly identified the type of file being played, DSD128 or DSD64. CPU utilization for the various files ranged from a low of 3.6% while playing DSD64 .dff files to a high of 23.8% during some portions of DSD128 .dsf playback. The major issues I found were as follows: For the DSD128 .dff file, CPU was in the ranges above until the very end of the cut. When it ended, CPU utilization spiked at 99.8% and remained at or close to this level for extended periods of time until MPD was restarted. Once MPD was restarted, it played the cut from the beginning and continued playing until it again reached the end of the track and hung again. DSD128 .dsf files did not exhibit this issue at the end of the file. But once in a while, the sound would simply stop playing. MPD continued to send the stream, but the Vega display no longer displayed DSD128 and no sound was heard. If I stopped playback and restarted it, the song started again at the beginning, the Vega again displayed DSD128 and sound returned. This playback stoppage occurred at random in different parts of the same files at different times. I was unable to predict when it would happen. Once and a while, there would be a minor dropout but the sound returned. However, when this happened, the sound did not return until I stopped playback (not MPD) and re-started it (when it would start the cut at the beginning again). DSD64 files did not experience either of the above issues (as far as I could tell, although I did not torture test these as much). With all of these file formats, I was unable to change the song position. My guess is that this feature has probably not yet been implemented. With some above formats (primarily DSD128), I get a rather loud pop when the playlist moves from one song to the next. This does not happen when hitting next to advance to the next track, only when processing a playlist and going from one song to the next. Playing a single song did not result in this same noise. I hope this is helpful. - Jim From: Punky [mailto:punky...@gmail.com] Sent: Wednesday, April 24, 2013 2:12 AM To: Jim Salk Cc: musicpd-dev-team@lists.sourceforge.net Subject: Re: [Musicpd-dev-team] DSD playback issues Hi Jurgen and all, I am the lead developer of Voyage MPD and I experience the same issue (hang at the end of playing) when replaying the .dff files downloaded from 2l.no http://2l.no . More specifically, the mpd process consume 100% of a single core. If I convert those problematic files to .dsf using Korg AudioGate, the problem resolved. Did others experience the same? I would like to see this fix or if anyone have pointer to aid me look into I, I can help. On Tue, Apr 23, 2013 at 4:31 AM, Jim Salk js...@salk.net mailto:js...@salk.net wrote: I have been experimenting with using MPD to play DSD files and ran into an issue. I am using an Alix 2 board, Voyage 0.9 rc2 and driving an AURALiC Vega DAC. Every once and a while, when a .dff file reaches the end, MPD hangs. I can restart it and it will pick up again playing the same file. And as long as the file does not reach the end, and I can switch to another file with no problem. But if I let the file play to the end, MPD hangs. If I convert that same file to .dsf, MPD handles it just fine. Is there an issue playing .dff files with MPD? If so, is anyone working on this? By the way, I did not notice this testing on a MAC using Audirvana as a player. Other things I noticed are that you cannot advance to another location in the track and DSD128 files are played as DSD64. I am sure everyone is aware of these limitations already, but am just pointing them out. -- -- Regards, Kim-man Punky Tse P U N K N ! X . c o m Technology + Lifestyle (http://www.punknix.com) /** Open Source Embedded Solutions and Systems **/ // Voyage Linux (http://linux.voyage.hk) // Voyage ONE (http://linux.voyage.hk/voyage-one) // Voyage MPD (http://linux.voyage.hk/voyage-mpd) /** Voyage Store (http://store.voyage.hk) **/ -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few
Re: [Musicpd-dev-team] DSD playback issues
Hi Jurgen and all, I am the lead developer of Voyage MPD and I experience the same issue (hang at the end of playing) when replaying the .dff files downloaded from 2l.no. More specifically, the mpd process consume 100% of a single core. If I convert those problematic files to .dsf using Korg AudioGate, the problem resolved. Did others experience the same? I would like to see this fix or if anyone have pointer to aid me look into I, I can help. On Tue, Apr 23, 2013 at 4:31 AM, Jim Salk js...@salk.net wrote: I have been experimenting with using MPD to play DSD files and ran into an issue. ** ** I am using an Alix 2 board, Voyage 0.9 rc2 and driving an AURALiC Vega DAC. Every once and a while, when a .dff file reaches the end, MPD hangs. I can restart it and it will pick up again playing the same file. And as long as the file does not reach the end, and I can switch to another file with no problem. But if I let the file play to the end, MPD hangs. If I convert that same file to .dsf, MPD handles it just fine. ** ** Is there an issue playing .dff files with MPD? If so, is anyone working on this? ** ** By the way, I did not notice this testing on a MAC using Audirvana as a player. ** ** Other things I noticed are that you cannot advance to another location in the track and DSD128 files are played as DSD64. I am sure everyone is aware of these limitations already, but am just pointing them out. -- -- Regards, Kim-man Punky Tse P U N K N ! X . c o m Technology + Lifestyle (http://www.punknix.com) /** Open Source Embedded Solutions and Systems **/ // Voyage Linux (http://linux.voyage.hk) // Voyage ONE (http://linux.voyage.hk/voyage-one) // Voyage MPD (http://linux.voyage.hk/voyage-mpd) /** Voyage Store (http://store.voyage.hk) **/ -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr___ Musicpd-dev-team mailing list Musicpd-dev-team@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/musicpd-dev-team
[Musicpd-dev-team] DSD playback issues
I have been experimenting with using MPD to play DSD files and ran into an issue. I am using an Alix 2 board, Voyage 0.9 rc2 and driving an AURALiC Vega DAC. Every once and a while, when a .dff file reaches the end, MPD hangs. I can restart it and it will pick up again playing the same file. And as long as the file does not reach the end, and I can switch to another file with no problem. But if I let the file play to the end, MPD hangs. If I convert that same file to .dsf, MPD handles it just fine. Is there an issue playing .dff files with MPD? If so, is anyone working on this? By the way, I did not notice this testing on a MAC using Audirvana as a player. Other things I noticed are that you cannot advance to another location in the track and DSD128 files are played as DSD64. I am sure everyone is aware of these limitations already, but am just pointing them out. - Jim -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter___ Musicpd-dev-team mailing list Musicpd-dev-team@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/musicpd-dev-team
