[alsa-devel] Focusrite Scarlett 18i8 3rd Gen audio interface

[wwp]

Hello Geoffrey,


On Tue, 15 Oct 2019 00:10:28 +1030 "Geoffrey D. Bennett" <g at b4.vu> wrote:

> Hi wwp,
> 
> On Sun, Oct 13, 2019 at 10:20:30AM +0200, wwp wrote:
> > Hello,
> > 
> > I've recently bought a Focusrite Scarlett 18i8 3rd Gen audio interface,
> > great device, but in CentOS 7, with either the available 3.x or 4.x
> > kernels, the device just appears in the available Alsa devices, but no
> > mixer is available, the device direct hardware monitor output is also
> > not working (it is, by default, and works well in Windows, but I
> > presume that w/ no mixer support in Alsa, it's expected that nothing
> > works). I'm able to bound I/O ports in QJackCtl but nothing goes out of
> > the device.  
> 
> Is any of the class-compliant functionality (play/record) working at
> all in CentOS 7? I would expect that out of the box you should be able
> to get standard ALSA/PulseAudio apps working for I/O.

I tried, nothing, maybe not tried right or enough.


> > Of course, adding the 0x1235:8214 USB ID to the quirks just doesn't
> > work. I presume there's more work like the patch submitted here (I saw
> > the archives) in the "[PATCH RFC V2] ALSA: usb-audio: Scarlett Gen 2
> > mixer interface" mail thread?  
> 
> Yes, there would definitely be more work to do along those lines. If
> we're lucky, the protocol is basically the same as 2nd gen and just
> extended for the additional features in the 3rd gen. FWIW, I haven't
> heard of anyone starting that work.
> 
> > Do you it is worth trying applying that 2nd Gen patch to one of the v4
> > kernel available for CentOS 7, adding the 3rd Gen quirks and see how it
> > behaves? Or is there already progress on supporting the 3rd Gen one too?  
> 
> I doubt that it would do much useful beyond letting you know if it
> accepts the same initialisation sequence as the 2nd gen devices. If
> you want to send me (off-list) a wireshark USB capture from 1) the
> Windows driver initialising your device and 2) you adjusting settings
> in Focusrite Control, I can have a look at it and let you know if it
> looks similar to the 2nd gen devices.

I tried -> broken pipe. IOW, it doesn't work, not as simple as doing as
if the 3rd gen was a 2nd gen.


Regards,

-- 
wwp
https://useplaintext.email/
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