Steinberg UR22 Crackling and Clicks

[meschi at posteo.de]

>> >> >> > It's likely the issues with the implicit feedback.
>> >> >> >
>> >> >> > The latest development tree (either linux-next tree or
>> >> >> > topic/usb-audio-refactoring branch of my sound.git tree) contains the
>> >> >> > improvements of the implicit feedback mode.
>> >> >> >
>> >> >> >
>> >> >> > Takashi
>> >> When I try to play a file now this happens:
>> >> $ aplay -D plughw:CARD=UR22 ./file.wav
>> >> Playing WAVE './file.wav' : Signed 16 bit Little Endian, Rate 44100
>> >> Hz, Stereo
>> >> aplay: set_params:1407: Unable to install hw params:
>> >
>> > It's a known side-effect of the implicit feedback mode, and the latest
>> > patchset I mentioned earlier addresses the issue.
>> >
>> >
>> > Takashi
>> 
>> I'm already running the kernel built from the linux-next tree...
>> I built next-20201208 from
>> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>> Is there another patch set that I'm missing?
> 
> Hm, strange.
> 
> Please check the contents of /proc/asound/card*/stream* file.  With
> the latest patches and the implicit feedback mode, you should see the
> lines like "Sync Endpoint: 0x...." and "Implicit Feedback Mode: yes".
> 
> 
> Takashi

Yes, I see this:

Yamaha Corporation Steinberg UR22 at usb-0000:00:1a.7-3, high speed : 
USB Audio

Playback:
   Status: Stop
   Interface 1
     Altset 1
     Format: S24_3LE
     Channels: 2
     Endpoint: 0x07 (7 OUT) (ASYNC)
     Rates: 44100, 48000
     Data packet interval: 125 us
     Bits: 24
     Channel map: FL FR
     Sync Endpoint: 0x81 (1 IN)
     Sync EP Interface: 2
     Sync EP Altset: 1
     Implicit Feedback Mode: Yes
   Interface 1
     Altset 2
     Format: S24_3LE
     Channels: 2
     Endpoint: 0x07 (7 OUT) (ASYNC)
     Rates: 88200, 96000
     Data packet interval: 125 us
     Bits: 24
     Channel map: FL FR
     Sync Endpoint: 0x81 (1 IN)
     Sync EP Interface: 2
     Sync EP Altset: 1
     Implicit Feedback Mode: Yes
   Interface 1
     Altset 3
     Format: S24_3LE
     Channels: 2
     Endpoint: 0x07 (7 OUT) (ASYNC)
     Rates: 176400, 192000
     Data packet interval: 125 us
     Bits: 24
     Channel map: FL FR
     Sync Endpoint: 0x81 (1 IN)
     Sync EP Interface: 2
     Sync EP Altset: 1
     Implicit Feedback Mode: Yes

Capture:
   Status: Stop
   Interface 2
     Altset 1
     Format: S24_3LE
     Channels: 2
     Endpoint: 0x86 (6 IN) (ASYNC)
     Rates: 44100, 48000
     Data packet interval: 125 us
     Bits: 24
     Channel map: FL FR
   Interface 2
     Altset 2
     Format: S24_3LE
     Channels: 2
     Endpoint: 0x86 (6 IN) (ASYNC)
     Rates: 88200, 96000
     Data packet interval: 125 us
     Bits: 24
     Channel map: FL FR
   Interface 2
     Altset 3
     Format: S24_3LE
     Channels: 2
     Endpoint: 0x86 (6 IN) (ASYNC)
     Rates: 176400, 192000
     Data packet interval: 125 us
     Bits: 24
     Channel map: FL FR