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: 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 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
