Re: fine sample rate control for RME hdsp 9632

[Takashi Iwai <tiwai@suse.de>]

At Thu, 8 Mar 2007 12:33:56 -0800 (PST),
Julian Cable wrote:
> 
> Hi,
> 
>   I've added a control to the hdsp driver to control the dds register on the 9632.
> This allows fine tuning of the sample rate as is supported by the windows driver. The
> feature is implemented as an offset to the current sample rate, since most of the code
> assumes only discrete sample rates are supported. So the sample rate will always be
> selected and indicated as one of the standard supported sample rates but may actually
> be a few % higher or lower. It seems to work very well.
> 
> One possible application is to discipline the sample rate from the system clock or a
> GPS receiver to provide a long term accurate precise frequency source without
> expensive reference clocks.
> 
> The patch is against alsa-driver-1.0.14rc3

Could you provide a patch as a unified diff (diff -u)?
At a first glance, the change looks almost OK.  One suggestion is to
avoid special characters like parentesis in the control name.

Also, please provide 'Signed-off-by: xxx' line, too.


Thanks,

Takashi

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