Very Computer

by **Gabriel L. Soml** » Wed, 20 May 1998 04:00:00

Hi, folks.

I've got a soundcard based on the OPTi 82C931 chipset. Luckily, isapnp
and a couple of outb()'s to the card enable it to work just fine with
version 3.8 of OSS/Free. The only thing that doesn't work is the MIDI
part. I tested it with playmidi, and it only makes noise when used with

playmidi -f somefile.mid (i.e., using FM emulation)

When I do

playmidi -D /dev/midi (or /dev/sequencer, or /dev/music) somefile.mid

nothing happens. I get no error, and playmidi thinks it's playing, but
there's no sound.

Is this because I have no wavetable on the soundcard ? I even tried the
software wavetable emulation of version 3.8 of OSS/Free, but I got the
exact same effect...

Anyone who can tell me what's going on ?

Thanks a lot,
Gabriel

PS The card initializes fine, it even thinks it's got MIDI up... Here's
the result of cat /dev/sndstat:

OSS/Free3.8s9-980302 (Mon May 18 22:55:35 MDT 1998 root,
Linux butthead 2.0.30 #7 Wed Apr 29 00:11:39 MDT 1998 i686 unknown)
Load type: Driver loaded as a module.
Kernel: Linux butthead 2.0.30 #7 Wed Apr 29 00:11:39 MDT 1998 i686
Config options: 0

Installed drivers:
Type 10: MS Sound System
Type 27: Compaq Deskpro XL
Type 1: OPL-2/OPL-3 FM
Type 5: Roland MPU-401

Card config:
MS Sound System at 0x530 irq 7 drq 3,0
Roland MPU-401 at 0x330 irq 9 drq 0
OPL-2/OPL-3 FM at 0x388 drq 0

Audio devices:
0: MSS audio codec (82C930) (DUPLEX)

Synth devices:
0: Yamaha OPL-3

Midi devices:
0: MPU-401 0.0 Midi interface #1

Timers:
0: System clock

Mixers:
0: MSS audio codec (82C930)

by **walt moffe** » Thu, 21 May 1998 04:00:00

>Hi, folks.

>I've got a soundcard based on the OPTi 82C931 chipset. Luckily, isapnp
>and a couple of outb()'s to the card enable it to work just fine with
>version 3.8 of OSS/Free. The only thing that doesn't work is the MIDI
>part. I tested it with playmidi, and it only makes noise when used with

>playmidi -f somefile.mid (i.e., using FM emulation)

Hmm, I used the drivers contained in the beta oss driver and the 931 I
have plays midi's fine. Visit this page for very helpful information:

http://oto.dyn.ml.org/~drees/opti931.html

by **Itai Nahsho** » Thu, 21 May 1998 04:00:00

> Hi, folks.

> I've got a soundcard based on the OPTi 82C931 chipset. Luckily, isapnp
> and a couple of outb()'s to the card enable it to work just fine with
> version 3.8 of OSS/Free. The only thing that doesn't work is the MIDI
> part. I tested it with playmidi, and it only makes noise when used with

> playmidi -f somefile.mid (i.e., using FM emulation)

> When I do

> playmidi -D /dev/midi (or /dev/sequencer, or /dev/music) somefile.mid

> nothing happens. I get no error, and playmidi thinks it's playing, but
> there's no sound.

1. Be sure that the card and speakers are connected properly.
(yes... we have seen complaints about sound not working because
the speakers were not connected).
2. Check the mixer setting. I think the synth port is usually
as line2 with the OPTi cards.
3. Maybe you need a newer version of playmidi (or xplaymidi).
(I have Playmidi 2.3 and it works fine. Had some difficulties
with older versions).

Itai
--

Very Computer

OPTi 82C931 soundcard and MIDI ?

OPTi 82C931 soundcard and MIDI ?

OPTi 82C931 soundcard and MIDI ?

OPTi 82C931 soundcard and MIDI ?