[Alsa-devel] C-Media 8378 revision 37 & OPL3 midi

2002-07-19 Thread Sander van Leeuwen

Hi,

I have two cmedia cards; a revision 37 & 39. Everything
works well on the rev 39 card, but OPL3 midi is silent
on the rev37.
OPL3 initialization succeeds and there are no clear signs
of any problems. My first guess was that this revision
may have a difference (bug) with regards to the FM
volume. However, testing different mute & volume settings 
shows no improvement.
All the IO registers related to FM appear to be working as
specified in the CMedia docs.

Is this a know problem of the ALSA driver, a hardware bug or 
even a defective OPL3 part in this particular revision?

Thanks,

Sander



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Re: [Alsa-devel] C-Media 8378 revision 37 & OPL3 midi

2002-07-19 Thread Patrick Shirkey

Sander van Leeuwen wrote:
> Hi,
> 
> I have two cmedia cards; a revision 37 & 39. Everything
> works well on the rev 39 card, but OPL3 midi is silent
> on the rev37.
> OPL3 initialization succeeds and there are no clear signs
> of any problems. My first guess was that this revision
> may have a difference (bug) with regards to the FM
> volume. However, testing different mute & volume settings 
> shows no improvement.
> All the IO registers related to FM appear to be working as
> specified in the CMedia docs.
> 
> Is this a know problem of the ALSA driver, a hardware bug or 
> even a defective OPL3 part in this particular revision?
> 

Can you let us know what you have done to get the midi i/o working? 
Preferably with debugging output. MIDI in ALSA is still a bit of a 
blackart so you may not have correctly setup everything yet.

Also have a look at the LAU guide (see below) and the quicktoots for 
more info on playing MIDI through ALSA.


-- 
Patrick Shirkey - Boost Hardware Ltd.
For the discerning hardware connoisseur
Http://www.boosthardware.com
Http://www.boosthardware.com/LAU/guide/




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Re: [Alsa-devel] C-Media 8378 revision 37 & OPL3 midi

2002-07-19 Thread Takashi Iwai

At Fri, 19 Jul 2002 11:17:29 +0200 (CDT),
Sander van Leeuwen wrote:
> 
> Hi,
> 
> I have two cmedia cards; a revision 37 & 39. Everything
> works well on the rev 39 card, but OPL3 midi is silent
> on the rev37.
> OPL3 initialization succeeds and there are no clear signs
> of any problems. My first guess was that this revision
> may have a difference (bug) with regards to the FM
> volume. However, testing different mute & volume settings 
> shows no improvement.

Synth volume and switch?

> All the IO registers related to FM appear to be working as
> specified in the CMedia docs.
> 
> Is this a know problem of the ALSA driver, a hardware bug or 
> even a defective OPL3 part in this particular revision?

the support of opl3 is bad on this driver.
it works somehow on my mine (rev 037) but the sounds are weird.
maybe another (undocumented) initialization step would be necessary.


Takashi


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