Re: [Alsa-user] splitting a 4 channel usb sound card into master and headphone

[Samuel N. <nic...@gm...>]

So whilst really trying to get my head around the syntax of the
configuration files, I figured the only way i truly could was to read
the source code.

whilst i was doing that i found this interesting configuration file
src/conf/cards/USB-Audio.conf

on lines 22 starts the description of configuring the usb device to be
two stereo devices not  a surround40

I'm not at home with my mix deck so cant test but its promising, i
might be able to fix not just my personal configuration but submit a
pull request to fix everyone's

On 2 February 2018 at 18:08, Samuel Nicholas <nic...@gm...> wrote:
>  this sounds exactly like what i am trying, first step for me is to
> familiarise myself with the asoundrc syntax and capabilities. i'll
> report back once i have something interesting
>
> On 2 February 2018 at 17:40, Charles Mulder <key...@gm...> wrote:
>> Hi Samuel.
>>
>> I think I have a similar problem with the Audient iD14. Maybe we could
>> collaborate?
>>
>> I haven't received many responses from the mailing list, so grateful for
>> Robert Bielik's suggestion.
>>
>> Looks like the dshare plugin has some parameters I'm not familiar with.
>> What's new?! :-) Hope I can find information to demystify. Will share when I
>> do. Please do the same.
>>
>> As a backup I have started reading Linux Device Drivers and have asked
>> Audient for their help.
>>
>> Here are some other resources I have found.
>>
>> A close look at ALSA
>> Linux ALSA sound notes
>> Writing an ALSA Driver
>> ALSA Runtime arguments in configuration files
>>
>> My strategy has just been to read and reread and keep trying to figure it
>> out. I imagine it's going to take some time. :-)
>>
>> Charles
>>
>> On Thu, Feb 1, 2018 at 11:09 PM Samuel Nicholas <nic...@gm...>
>> wrote:
>>>
>>> Hi,
>>>
>>> I have a Pioneer DDJ-WeGO, 4 channel USB device that outputs stereo
>>> master and stereo headphone.
>>> I've been scouring the internet trying to find out how I can possibly
>>> split up the ports as it presents as a surround 4.0 device.
>>>
>>> So far I've come up with nothing except an remapping in pulseaudio
>>> that is super ugly to use.
>>> I really would like to solve this at the lowest possible layer.
>>>
>>> U have udev rules to discriminate the device working fine.
>>>
>>> Is there any way to do this with alsa?
>>>
>>> Cheers for any help,
>>> Samuel.
>>>
>>>
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>> --
>> Charles Mulder
>> Software Engineer/Musician
>> mobile: +27 83 653 3698
>> phone: +27 27 948 2592
>> skype: charliemurder