Re: [Emu10k1-devel] Tone Control

[Daniel B. <d.b...@ie...>]

The tone control is a special beast, the control GPRs aren't volume
controls but constants which change the response of the filter. Normal,
tone control is done directly via the normal /dev/mixer interface, not 
through emu-dspmgr.

If you want to control the registers directly, the tables of constants are
in mixer.c. There's two special functions in there (set_bass and
set_treble) which shows what needs to be done.



On Sun, 24 Feb 2002, Chris Roadfeldt wrote:

> I am having some difficulty getting the tone control to work properly
> for Gemu. I have created a mixer for it that attaches to bass and
> treble. It does not attach to bass_1, bass_2,...
> 
> The mixer is able to set the value of bass and treble, but the sound is
> horribly distorted when doing so. The values I set for bass and treble
> are within the range specified by min_val and max_val. I am assuming
> that I will need to connect to bass_1, bass_2,... Another problem is
> that I have no idea what these extra gpr's are for. If you assign the
> bass and treble OSS mixer controls, they also attach to the bass and
> treble gpr's, ignoring the others. But when the OSS mixer bass and
> treble controls are changed so are the values for bass_1, bass_2,... How
> is this happening?
> 
> Can someone let me know what I need to do to get bass and treble working
> properly. I don't want to rely on the OSS mixer to do this. I want Gemu
> to be able to control the bass and treble itself, similar to how it
> controls the volume.
> 
> Chris
> 
> 
> 
> 
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-- 
Daniel Bertrand