Re: [PATCH 11/11] ALSA: digi00x: apply double-oh-three algorism to multiplex PCM samples

Robin Gareus
2015-03-19T14:00:18Z

On 03/18/2015 02:06 AM, Takashi Sakamoto wrote:
>
>
> On 2015年03月17日 22:49, Damien Zammit wrote:
>> Can we include my mixer control into the driver?
>
> Depends on the reason.
>
>> I think it is important to include the clock source selector switch as
>> an alsamixer setting.
>
> Please explain the importance, especially the reason to include the
> selector into kernel code instead of userspace application.

Can one access the device from userspace while the kernel is using it to
stream audio or midi ("Device or resource busy") ?

This is one of the reasons, why USB soundcards expose all settings
though the alsa mixer interface. It also offers a standardized interface
for userspace apps to build on top and a method to directly link mixer
to soundcard for systems with multiple soundcards.

How do you envisage to handle this?

2c,
robin

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