On Sun, 8 Jan 2017 23:06:54 +0100 Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxx> wrote: > On Sun, 8 Jan 2017 21:25:35 +0100, Johannes Kroll wrote: > >...which would mean that you if you listen to an input, you mix it with > >a copy of itself delayed by the buffer size. That would definately > >sound weird, and could explain Ralf's experience. > > No, since on Linux I used Ardour and directly connected the stereo > track's outputs by jackd to playback_n. I didn't test any of the > 18i20's inputs. OK. Would still be interested in the comparison recordings you mentioned. > >That's definately an issue with my 18i8 first-gen as well. When I set > >an output control to more than 0db, the output doesn't clip -- it > >integer-wraps, which causes really evil distortion. I confirmed that > >with an oscilloscope. I'm not sure whether this is a Linux driver > >issue, or bad design. It shouldn't be possible to turn volume up beyond > >the 0db setting if that causes such distortion. > > > 0 dB related to what? The audio files were played with an output > < 0 dBFS and perhaps at max. 0 dBFS here. Does the Focusrite mixer > control the analog domain? Does it increase a digital signal that comes > from the DAW by the digital domain? I'm referring to the ALSA mixer control, which goes up to +6db. > On Sun, 8 Jan 2017 21:46:40 +0100, Johannes Kroll wrote: > >First, look here: > >https://github.com/smilingthax/alsa-driver_scarlett/commit/7a77707b66ee476dbf2b87c18fde6a2ea4ded1ec?diff=split > >(This patch is now inside the mainline kernel; I did not write it) > > It's neither part of the latest kernel supported by the rt project, nor > by the current mainline rc, https://www.kernel.org/ : I've used the Scarlett on a stock Ubuntu kernel, Mint kernel, and the AVL RT kernels. Mixer controls work on all of them, so I assumed the patch would be in mainline by now. You can try applying this patch: https://github.com/smilingthax/alsa-driver_scarlett/tree/patches _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
