At Tue, 4 Nov 2003 19:35:37 -0500, Marcel wrote: > > * Takashi Iwai ([EMAIL PROTECTED]) wrote: > > At Fri, 31 Oct 2003 12:39:18 -0500, > > Marcel wrote: > > > > > > * Takashi Iwai ([EMAIL PROTECTED]) wrote: > > > > At Thu, 30 Oct 2003 12:42:39 -0500, > > > > Marcel wrote: > > > > > > > > > > > > > > > I've been trying to finetune my cmipci for several weeks now. And this is > > > > > the best way I've been able to get transparent operation with various audio > > > > > material: stereo, mono, 4.0, 5.1. The main problem being no surround sound > > > > > iif "Exchange DAC" setting was not set, and sound on the rear speakers only > > > > > if it was. > > > > > > > > ah, this might be true. > > > > does it happen both on 4.0 and 5.1 outputs? > > > > i don't remember that it's necessary for 5.1 at the last time i > > > > tested. > > > > > > With surround40 plugin, 4 speakers, yes it's needed for both 4.0 and 5.1 > > > material. Applications such as mplayer or xine will remix 5.1 material to > > > 4 channels. For 6 speakers systems, I really don't know. > > > > could you try surround51 and check whether it somehow works? > > I tried. It's ok with stereo material. With 5.1 material, xine refuses to > use it because I have 4 speakers only. Mplayer will use it but 2 channels > only. Seems there is no way to force applications to use 6 channels when I > got only 4 speakers. "Mplayer -ao alsa9:surround51 -channels 6" gives an > error. And I don't have any 5.1 sound file in wav or mp3 format for aplay > or alsaplayer to try. Never been able to locate some. But I suspect it > will fail too. I think you'll need someone with 6 physical speakers to have > this verified. > > > > > > > perhaps we should simply remove this control from user and handle > > > > internally for the MC6 chip. > > > > > > > > > > I agree. Its usage is confusing and may results in improper operation > > > > how about the attached patch? > > Great job! If I understand how it works, the mixer setting is gone for the > 8738-MC[46] chipsets, and still there for plain 8[37]38. Works very well > here, no more confusion. Multi-channel sound is enabled automatically. > Front material is always in front, and surround material always in rear. > > Adjustment is unconventional, but straightforward for surround material: > > 1 - Master at 0. > 2 - Adjust rear volume with PCM near maximum required. > 3 - Increase front volume with Master to obtain rear-front balance. > 4 - Decrease PCM to lower volume on all 4 speakers. > > Unusual, but that's the way its operates.
hmm, it seems there is something wrong in the SB-style mixer code. perhaps we need to put some delay. anyway, the changes are now applied to cvs. > One more control that deserves to go in mixer: "3D Control Switch". It > doesn't work, never did, does nothing at all. well, it works for the older model. it's a 3D-enhancement and not really 3d thing. i'm not sure whether this doesn't work for all new models (> 037), so it still remains there. we can remove it later after confirming that all new chips don't support this. Takashi ------------------------------------------------------- This SF.Net email sponsored by: ApacheCon 2003, 16-19 November in Las Vegas. Learn firsthand the latest developments in Apache, PHP, Perl, XML, Java, MySQL, WebDAV, and more! http://www.apachecon.com/ _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
