From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Revell Subject: Re: Audigy SPDIF Output Sample Rate Date: Fri, 25 Feb 2005 16:58:47 -0500 Message-ID: <1109368727.13193.10.camel@krustophenia.net> References: <1108880895.6773.50.camel@radium.gaugetheory.org> <1109351825.9681.43.camel@krustophenia.net> <1109367868.6245.9.camel@cthulhu.rlyeth.net> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit In-Reply-To: <1109367868.6245.9.camel@cthulhu.rlyeth.net> Sender: alsa-user-admin@lists.sourceforge.net Errors-To: alsa-user-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: The Orqwith Vagrant Cc: alsa-user@lists.sourceforge.net, alsa-devel List-Id: alsa-devel@alsa-project.org On Fri, 2005-02-25 at 22:44 +0100, The Orqwith Vagrant wrote: > On Fri, 2005-02-25 at 12:17 -0500, Lee Revell wrote: > > On Sun, 2005-02-20 at 01:28 -0500, Brian L Scipioni wrote: > > > I'm using yesterday's CVS. > > > > > > The new alsamixer control "Audigy SPDIF Output Sample Rate" for the > > > emu10k1 toggles the sample rate among 44100, 48000 and 96000. I believe > > > the mapping here is wrong (or at least the 3 rate labels are reversed). > > > My 5.1 receiver will accept 441000, 48000 or 96000 from SPDIF. When it > > > receives a 96KHz, signal it will indicate that with "96 k" printed out > > > on the receiver front panel LEDs. It does that when alsamixer selects > > > 44100 and NOT 48000 or 96000. So when alsamixer displays 44100, it > > > appears 96000 is actually being output. > > > > > > > Thanks. Please try the attached patch. > > > > Does your receiver tell you if it's receiving 48000 or 44100? If so > > please check that those are also correct. > > > > So, have you tested that 96KHz SPDIF playback sounds OK? None of the > > alsa developers seem to have a 96KHz capable receiver (unless someone > > want to give me one ;-)) so this is all untested so far. > > > > > Also some new behavior with the latest CVS: > > > When monitoring Aux2 in, the sound is badly distorted until the "Audigy > > > SPDIF Output Sample Rate" switch is toggled back and forth among the > > > rates. After a little rate switching, the sound becomes fine. > > > > This is probably related to this cryptic comment from some Creative > > engineer: > > > > 298 if (emu->revision == 4) { /* audigy2 */ > > 299 /* Unmute Analog now. Set GPO6 to 1 for Apollo. > > 300 * This has to be done after init ALice3 I2SOut beyond 48KHz. > > 301 * So, sequence is important. */ > > 302 outl(inl(emu->port + A_IOCFG) | 0x0040, emu->port + A_IOCFG); > > > > We have no idea what "Alice3" and "Apollo" are, though we have some good > > guesses ;-) > > > > I'll see if I can fix this. The comment implies that in order to set > > 96KHz mode, we may have to mute and unmute analog around the samplerate > > register setting. So instead of noise you would get a brief silence. > > > > Lee > > As someone who does have a 96 Khz capable reciever, I thought I might > add my own comments tho this. The 96khz setting works perfect, sounds > perfect with this patch; however, 48 & 44.1 are reversed now. Trying to > play 48khz samples when the setting is 44.1 causes ugly scratchy > distortion, but oddly, only on the right channel. Using the spdif raw > PCM device, which reverses left and right channels of a stereo file, > still has the distortion on the right channel. OK I'll post a new patch. > No luck with ac3 at any sample rate, but ac3 passthrough has never > worked for me, and I have tried basically everything suggested on this > mailing list to others with similar problems. The reason I'm always > quick to test any patch/change that touches emu10k1 SPDIF is because I'm > always hopeful it will somehow also solve my AC3-deficiency. No luck > with _that_ so far. Oh well... > That's strange. It should work. I guess you made sure to enable the "IEC958 Optical Raw" switch, and the "Audigy Analog/Digital Mode"? There was someone else who could not get it to work no matter what and swapping the cable fixed it. Anyway, that's weird. > One thing tho: iecset still lists the spdif output rate as 48khz when > it's set to 96khz, even though the reciever does say it's getting 96khz. > Furthermore, trying to use "iecset rate 96000" causes iecset to report > 44.1khz... but no change on the reciever, it still says 96khz if it's > set that way in the alsa mixer, Should this be the case? > Another - wouldn't in fact iecset be what you should use to change this > setting, rather than have a mixer element for it? I saw a change like > that was done in another driver recently, so perhaps that'd be a good > idea for emu10k1 as well, if only for the sake of consistency? > The reason I made it a separate control is that 96KHz mode is not set by the standard SPDIF status bits. There is a separate register for it. Maybe someone on alsa-devel can explain the relationship between this control and iecset. I really have no idea. > Notes: My card is an Audigy2 Platinum, my amp is a Denon AVR-3803, and > I'm using the optical spdif connector on the audigy drive to connect > them. > Can someone else with the same hardware can confirm or deny that they also have the AC3 problem? Also, did you open a bug report? Please check for an existing one first. Lee ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. 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