21 Jun
2017
21 Jun
'17
10:06 p.m.
Dear Lloyd,
I have Scarlett 18i20, and it audio works works using Alsa, Jack and pulseaudio provided
I use 44.1 kHz or 48 kHz. Higher rates do not work, also the mixer can not be accessed.
Nevertheless I managed to record using the 8 analog input while monitoring the output.
I'm using kubuntu 16.10, Linux 4.8.0-54-generic .
Sadly I'm not a ALSA expert.
I am interested in any pointer to or information about
how to configure and use this Scarlett 2nd Generation device.
I actually configured nothing, it just worked (using 44.1 and 48 kHz). Still, it's
annoying that the higher sampling rates do not work,
and access to the mixer would also be nice.
Best regards,
Peter
P.S. My private request at Focusrite only resulted in a response, saying hat they are not
supporting Linux.
Am 21.06.2017 um 21:47 schrieb Lloyd Dickman:
I am trying to make a Focusrite Scarlett 18i20 (2nd
Generation) work as a USB audio capture device with Linux. Using the most current Linux
kernel without change (v4.12-rc6), Mic inputs 1 and 2 are successfully captured.
However, no other inputs are heard. The Scarlett device also presents a very limited set
of ALSA controls.
exxothermic@exxothermic-BFC:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 1235:8201 Focusrite-Novation
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
exxothermic@exxothermic-BFC:~$ amixer -c 1 contents
numid=3,iface=MIXER,name='ADAT Validity'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=4,iface=MIXER,name='Clock Source'
; type=ENUMERATED,access=rw------,values=1,items=3
; Item #0 'Internal'
; Item #1 'S/PDIF'
; Item #2 'ADAT'
: values=0
numid=1,iface=MIXER,name='Internal Validity'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=2,iface=MIXER,name='S/PDIF Validity'
; type=BOOLEAN,access=rw------,values=1
: values=on
I modified sound/usb driver files mixer_quirks.c and mixer_scarlett.c to treat the
Scarlett 2nd generation device the same way it handles the Scarlett 1st generation
0x1235:0x800c 1st Generation
0x1235:0x8201 2nd Generation
When checking with amixer, 228 controls are now listed, along with errors that prevent
alsamixer from being used. I have no information about how to properly configure these
controls.
I am interested in any pointer to or information about how to configure and use this
Scarlett 2nd Generation device.
Thank you,
Lloyd Dickman
lloyd(a)audioeverywhere.com
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