At Tue, 11 Nov 2003 11:12:02 -0700, Steven Bergom wrote: > > Greetings: > > I recently puchased an 865PE motherboard from MSI, which includes > a CMedia 9739A audio chip. I then compiled linux 2.6.0-test8 and, > after a little digging around chose the intel8x0 ALSA driver to > drive my sound system. The system booted, I un-muted the PCM and > Master volume, played an MP3 and was absolutely astounded at the > extremely good sound quality and the absolute lack of volume control. > > So I searched the archive for this mailing list and found two messages > expounding the same problem. The respondent answered that the > CM9xxx chips do not have a PCM Mixer control and, after reading > through the CMI9739A Technical Brief available from C-Media's web > site I was able to verify this fact. This is all well and good, > but I still want volume control and I am not sure how to go about > doing it at this point. Should I > > 1. Forget using ALSA and use a deprecated OSS driver, > > 2. Continue my attempts to hack the Linux driver that C-Media > distributes so that it works with the 2.6 kernels (it runs, > but still no volume and the sound output is noticeably > inferior), > > 3. Find/write some user-space utility that programmatically > controls the volume, > > 4. Pony up the dough to buy a real sound card and stop relying > on on-board codecs, or > > 5. Scream, rant and rave and people and projects wholly > disconnected with my perceived problem. > > While no. 5 sounds like the most fun, I have been informed by others > that it might not be the most political of responses. Any input is > greatly appreciated.
there is also "master" control on this chip, and this control should work. on many mobos, the true line-out (aka headphone) pin is connected to the line-out jack. in such a case, ac97 master control doesn't do anything but other control such as "headphone" or "surround" might affect the volume. anyway, there must be some way to control the "master" volume, in addition to "pcm" switch. if not, it should be a bug of the driver, or the chip is messy and we need a workaround. 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-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
