> EQ Peaks is a volatile control without write access (i.e. you cannot use
> slider since you cannot modify the value ) which provide the peak of 10
> bands (31Hz, 63Hz, 125Hz, 250Hz, 500Hz, 1Kz, 2Kz, 4Kz, 8Kz , 16Kz) stereo
> channels of the au8830's hardware equalizer , ( one stereo vu-meters at
> each band )
>
> The values are ordered by left channel of 10 bands followed by right
> channel of 10 bands
>
>
> control.12 {
> comment.access read
> comment.type INTEGER
> comment.count 20
> comment.range '0 - 32767'
> iface MIXER
> name 'EQ Peaks'
> value.0 1
> value.1 1
> value.2 0
> value.3 0
> value.4 1
> value.5 1
> value.6 1
> value.7 1
> value.8 0
> value.9 0
> value.10 1
> value.11 1
> value.12 0
> value.13 0
> value.14 0
> value.15 0
> value.16 1
> value.17 1
> value.18 0
> value.19 0
> }
Where do you get this listing from?
I greped through the alsa source but did not find it.
Is it an amixer output or so?
> EQ enable switch control the output of DSP pass through/bypass the equalizer
> ,
> so your application can based on the on/off state of the switch to
> start/stop a timer which read the value from EQ peak control and display on
> 10 stereo vu-meters at regular time intervals
>
> There are also 10 stereo volume controls to control gain/atten of 10 bands
> of the hardware equalizer
>
I see, thank you for the explanation!
> if your application are unable to display EQ peaks , it is better to skip
> this "EQ peaks" control with count =20 or simple mixer control with 20
> channels
For now I'll skip any element which is named "EQ peaks".
Would this be acceptable with regard to other cards?
> All the EQ controls appear on capture side is a bug of alsa-lib or the
> driver , either change the name of those "EQ xx" controls to "EQ xx
> Playback" in the driver or add "EQ" to the definition of the controls name
There could be a workaround for this bug in the mixer but IMHO
it should better be fixed in the driver or alsa-lib.
I've enabled the Mercurial repository at sourceforge, it is at:
http://alsamixer-qt4.hg.sourceforge.net:8000/hgroot/alsamixer-qt4/alsamixer-qt4
Cloning and compiling should work like this:
hg clone
http://alsamixer-qt4.hg.sourceforge.net:8000/hgroot/alsamixer-qt4/alsamixer-qt4
cd alsamixer-qt4
mkdir build && cd build
cmake
make
The changes are in the repository if you want to give them a try.
Best,
Sebastian
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