usb/183409: USB Class 2 audio device playback issue

[Hans Petter Selasky]

The following reply was made to PR usb/183409; it has been noted by GNATS.

From: Hans Petter Selasky <hps at bitfrost.no>
To: Taner <taner76gmail.com at FreeBSD.org>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: usb/183409: USB Class 2 audio device playback issue
Date: Mon, 28 Oct 2013 19:23:28 +0100

 On 10/28/13 17:17, Taner wrote:
 >
 >> Number:         183409
 >> Category:       usb
 >> Synopsis:       USB Class 2 audio device playback issue
 >> Confidential:   no
 >> Severity:       non-critical
 >> Priority:       low
 >> Responsible:    freebsd-usb
 >> State:          open
 >> Quarter:
 >> Keywords:
 >> Date-Required:
 >> Class:          sw-bug
 >> Submitter-Id:   current-users
 >> Arrival-Date:   Mon Oct 28 16:20:00 UTC 2013
 >> Closed-Date:
 >> Last-Modified:
 >> Originator:     Taner
 >> Release:        10.0-BETA1
 >> Organization:
 >> Environment:
 > FreeBSD bsd 10.0-BETA1 FreeBSD 10.0-BETA1 #2 r256773M: Sun Oct 20 20:52:31 EEST 2013     root at bsd:/usr/obj/usr/src/sys/GENERIC  amd64
 >> Description:
 > My asyncronous USB to I2S interface (http://amanero.com/) has detected on a amd64 FreeBSD-10.0-BETA1 system. But playback is crackling like old vinyl records.
 >
 > I haven't similar issues with other operating systems.
 >
 > With enabling debug, lots of these error messages appear on dmesg output:
 >
 > uaudio_chan_play_sync_callback: Value = 0x0005fff8
 > uaudio_chan_play_sync_callback: Comparing 47998 < 48000
 > uaudio_chan_play_sync_callback: Value = 0x0005fff6
 > uaudio_chan_play_sync_callback: Comparing 47998 < 48000
 >
 > or
 >
 > uaudio_chan_play_sync_callback: Value = 0x000bfff0
 > uaudio_chan_play_sync_callback: Comparing 95997 < 96000
 > uaudio_chan_play_sync_callback: Value = 0x000bfff0
 > uaudio_chan_play_sync_callback: Comparing 95997 < 96000
 >
 > ---> dmesg output while device attached
 >
 > uaudio0: at uhub1, port 3, addr 1 (disconnected)
 > pcm0: detached
 > uaudio0: <Amanero Technologies Combo384 Amanero, class 239/2, rev
 > 2.00/1.80, addr 1> on usbus0
 > uaudio0: Play: 96000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
 > uaudio0: Play: 88200 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
 > uaudio0: Play: 48000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
 > uaudio0: Play: 44100 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
 > uaudio0: Play: 32000 Hz, 2 ch, 32-bit S-LE PCM format, 2x8ms buffer.
 > uaudio0: No recording.
 > uaudio0: No MIDI sequencer.
 > pcm0: <USB audio> on uaudio0
 > uaudio0: No HID volume keys found.
 >> How-To-Repeat:
 > Playback any audio file/stream.
 >> Fix:
 
 Hi,
 
 Can you add output from "usbconfig -d X.Y dump_device_desc 
 dump_curr_config_desc" and "lsusb -vv" from /usr/ports/sysutils/usbutils
 
 Also, is the device directly connected to the USB port? No hub in between.
 
 Did you try other sample and bit rates by setting the sysctls below?
 
 hw.usb.uaudio.default_channels: 0
 hw.usb.uaudio.default_bits: 32
 hw.usb.uaudio.default_rate: 0
 
 default_bits=16, 24
 default_rate=48000
 
 --HPS