[LAU] Sound quality of the Focusrite Scarlett 18i20 2nd Gen

[Ralf Mardorf]

On Sun, 8 Jan 2017 21:01:45 +0100, Georg Krause wrote:
>Am 08.01.2017 um 20:53 schrieb Robin Gareus:
>>> Missing alsamixer controls aren't a problem for me.  
>> ..except that the default routing inside the device may affect what
>> you're hearing. OOTB it patches analog inputs through to the
>> outputs

Ok, this could be nasty, assuming I should use the analog I/Os for some
reason, so I at least should get rid of passing inputs through to
outputs.

>Not just that, my focusrite sounds crappy when the outputs are "too
>loud" in alsamixer. means over 80% its not usable. so maybe that is an
>issue, Ralf?

I don't know if there is a less optimal bias point for the analog
domain, at least the audio source didn't cause a signal > 0 dBFS.

To patch the kernel, do I need to search an alsa / snd_usb_audio
source file to add the ID or is it somewhere else? ...

[rocketmouse at archlinux ~]$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDSPMx579bcc [RME AIO_579bcc], device 0: RME AIO [RME AIO]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 3: USB [Scarlett 18i20 USB], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
[rocketmouse at archlinux ~]$ lsusb
Bus 001 Device 017: ID 1235:8201 Focusrite-Novation 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 192f:0916 Avago Technologies, Pte. 
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

... and the ID would be "ID 1235:8201"?

Regards,
Ralf