Re: 2.6 sound drivers?

[Takashi Iwai <tiwai@suse.de>]

At Thu, 17 Jul 2003 20:44:02 +0100,
Ian Hastie wrote:
> 
> On Thursday 17 Jul 2003 17:54, Takashi Iwai wrote:
> > At Thu, 17 Jul 2003 13:08:51 -0300,
> >
> > Norberto BENSA wrote:
> > > Terje Kvernes wrote:
> > > > Norberto BENSA <nbensa@gmx.net> writes:
> > > > > Last time I've checked ALSA, it didn't support bass and treble,
> > > > > that's why I'm using OSS (emu10k1)
> > > >
> > > >   I have treble and base support on my emu10k1 via ALSA.
> > >
> > > How could this be true if:
> > >
> > > Ian Hastie wrote:
> > > > ALSA's support seems usable, but still doesn't allow you to programme
> > > > the DSP with your own code.  OSS uses this to enable such things as
> > > > bass and treble controls, as well as a selection of audio effects with
> > > > code provided.  Anyone know if ALSA will allow this kind of thing in
> > > > the future?
> > >
> > > ???
> >
> > the treble/bass code is implemented statically.
> > (so it is also on OSS emu10k1 as default, btw.)
> 
> Are you sure about this?

i don't know about the very latest one, but at least until 2.4.20
there are static bass/treble tables in emu10k1/mixer.c.
they worked even without running emu-script.

> My recollection from using the SF code was that Bass 
> and Treble weren't there until you used the setup script that came with the 
> package.  What that does is to load a piece of DSP code which provides extra 
> functions.  It also has to set up the appropriate routings to enable the 
> extra controls.

yes, that makes sense.

> The insertion of arbitrary code and the easy setting up of routings are the 
> two main things missing at the moment from the ALSA emu10k1 driver.  That's 
> how it seems to me anyway.
 
yes.  that has been a big TODO.


Takashi