From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Wooledge Date: Wed, 13 Jan 1999 00:33:49 +0000 Subject: Re: SB16 problem Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sound@vger.kernel.org Thanks for the responses, everyone! I'll only point out the most interesting comments here, and remove the attributions to preserve a bit of anonymity. > No. Sad to say, but it is really 8 bit DMA channel. > I heard that Vibra does not have 16 bit DMA. > > Hence the error. This unfortunately matches what the manual hints at (but doesn't say outright). In the "BLASTER environment variable" section, it says: Parameter Description ----------+---------------------------------------------------------------- Hx | High DMA channel used by the audio interface. x defaults to 5. | Sound Blaster 16 model CT4181 only. > It's correct however - you don't (most probably) have 16 bit sound working. > Only 8bit. Try realplayer and you'll find that out! Under my original settings, I had to check the 'Disable 16-bit sound' box in rvplayer. However, under my current settings I can hear sounds with the box checked or un-checked. I'm leaving it un-checked. > I think the vibra cards need a little tweak to the sound driver. I haven't had > time to look. Can you check out a recent driver? I've also downloaded and tried the OSS commercial driver (demo), version osslinux392pre-glibc-220-pre6-UP.tar.gz, with 2.2.0-pre6. I get very similar results -- there appears to be no 16-bit DMA channel. (It would have been nice if the OSS pages had told me in advance that I'd have to use CONFIG_MODVERSIONS in my kernel for their driver to work. It would have saved me an extra kernel build. Oh, well.) > (I moved the vibra that came with my new machine to somewhere else and hung > on to my classic sb16, which works nicely thank you). My other soundcard is an sb8. :-( (It's still in my old machine, which is now an IP-masq gateway and NFS server.) > (DMA 1 (CHANNEL 5)) > > options sb io=0x220 irq=5 dma=1 dma16=5 mpu_io=0x330 > > Could you let me know if this works on your setup? Those are (some of) the lines I had. They do not work with the ViBRA card. I get the same problem I had originally -- no sound when using /dev/dsp, and error messages in dmesg. In summary, it seems I can get the ViBRA to play 16-bit sounds, but not through a 16-bit DMA channel. I'm getting the "best" results with "options sb io=0x220 irq=5 dma=1 dma16=3 mpu_io=0x330" and the first ("preferred") section in /etc/isapnp.conf. I've successfully played .au, .wav, .mp3 and .ra sound files, so I'm pretty content. -- Greg Wooledge | Distributed.NET http://www.distributed.net/ wooledge@kellnet.com | because a CPU is a terrible thing to waste. http://www.kellnet.com/wooledge/ |