Yeah, ALSA's documentation is actually quite lacking on many frontsand is mostly scattered around various wikis and mailing lists. But I guess it is as it is, complaining about it won't fix it. On 2/9/09, Demian Martin <demianm_1@xxxxxxxxx> wrote:> Thanks, I'll try that. I guess this e-mail will serve as more documentation> on that feature (bug). I had not seen that factoid anywhere.>> Demian Martin> PDS>>>> -----Original Message----->> From: Vedran Miletić [mailto:rivanvx@xxxxxxxxx]>> Sent: Monday, February 09, 2009 1:39 PM>> To: Demian Martin>> Cc: Pavel Hofman; alsa-devel@xxxxxxxxxxxxxxxx>> Subject: Re: Juli@ ICE1724 and 24 bit audio>>>> The plughw part is what makese it resample to 16-bit. You should just use>> hw.>>>> On Mon, Feb 9, 2009 at 10:29 PM, Demian Martin <demianm_1@xxxxxxxxx>>> wrote:>> > Pavel:>> > Thanks for all your help and work on this project.>> >>> > I'm using the Juli@ card because it supports 176.4KHz. The only other>> > candidates are much more expensive and bring their own problems.>> >>> > I'm using Xine set for dolby/dts passthrough which seems to send the>> audio>> > data at its native rate. The resampling is bypassed (Dolby Digital would>> be>> > trashed otherwise).>> >>> > I will try playing the files from the command line when I am next in>> front>> > of the system, tomorrow.>> >>> > This is the Asound.conf:>> > Asound.conf (/etc)>> >>> > pcm.asym_spdif {>> >>> > type asym>> >>> > playback.pcm "plughw:0,1">> >>> > capture.pcm "plughw:0">> >>> > }>> >>> >>> > pcm.!default asym_spdif>> >>> > Demian Martin>> > PDS>> >>> >> -----Original Message----->> >> From: Pavel Hofman [mailto:pavel.hofman@xxxxxxxxx]>> >> Sent: Monday, February 09, 2009 12:27 PM>> >> To: Demian Martin>> >> Cc: alsa-devel@xxxxxxxxxxxxxxxx; pavel.hofman@xxxxxxxxx>> >> Subject: Re: [alsa-devel] Juli@ ICE1724 and 24 bit audio>> >>>> >> Demian Martin napsal(a):>> >> > I have the driver working fine for sample rates from 44.1K to 196K>> >> however>> >> > it seems to be truncating the data to 16 bits. I wasn't sure until I>> >> started>> >> > testing with the HRx 176.4K 24 bit files that have an embedded HDCD>> flag>> >> in>> >> > the LSB. The files work OK on Windoze systems (with a lot of low>> level>> >> > settings tweaked) and they play fine but the flag isn't detected by a>> >> system>> >> > that can detect them. Further looking at the data stream with a scope>> it>> >> > seems the last 8 bits aren't changing. Is there anything I can do to>> >> control>> >> > the driver to confirm this problem or change the playback settings to>> >> make>> >> > it work?>> >> >>> >> >>> >>>> >> How do you play the files? Do you use the hw or plug:hw device? IIRC,>> >> the standard-setup dmix resampler is 16-bit only.>> >>>> >> I did tests with SPDIF OUT/IN and found it bit-perfect, for 24bit too.>> >>>> >> Regular ICE1724 cards do not output 176.4kHz SPDIF, only 88.2kHz. But>> >> Juli is not affected by that bug.>> >>>> >> Regards,>> >>>> >>>> >> Pavel.>> >>> > _______________________________________________>> > Alsa-devel mailing list>> > Alsa-devel@xxxxxxxxxxxxxxxx>> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel>> >>>>>>>>> -->> Vedran Miletić>> -- Vedran Miletić_______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
