More information, still not success...
On Wed, Sep 12, 2012 at 2:19 PM, Daniel Mack <zonque@xxxxxxxxx> wrote:
> I suggest using aplay for that kind of test. It's the simplest client I
> can think of, and the less logic you have in the chain the better.
Ok, using aplay -L I seem to have a lot of alternatives for this device.
I decided to avoid the default, surround, ied958, dmix and dsnoop ones.
(that dsnoop thing sounds interesting, but anyway).
That leaves me with three "hw" and three "plughw" interfaces.
hw:CARD=Interface,DEV=0
Schiit USB Interface, USB Audio
Direct hardware device without any conversions
hw:CARD=Interface,DEV=1
Schiit USB Interface, USB Audio #1
Direct hardware device without any conversions
hw:CARD=Interface,DEV=2
Schiit USB Interface, USB Audio #2
Direct hardware device without any conversions
plughw:CARD=Interface,DEV=0
Schiit USB Interface, USB Audio
Hardware device with all software conversions
plughw:CARD=Interface,DEV=1
Schiit USB Interface, USB Audio #1
Hardware device with all software conversions
plughw:CARD=Interface,DEV=2
Schiit USB Interface, USB Audio #2
Hardware device with all software conversions
Still on the "bit perfect" goal, I decided to try the hw interfaces.
The 44.1 / 16bit file works fine on hw:CARD=Interface,DEV=0 but there
is no sound on hw:CARD-interface,DEV=1 nor ...DEV=2.
The 192 / 24bit file errors out on all the hw: interfaces, eg:
clh@nice:~/WavTest$ sudo aplay -D hw:CARD=Interface,DEV=0 2L*.wav
Home directory /home/clh not ours.
Playing WAVE '2L38_01_192kHz.wav' : Signed 24 bit Little Endian in
3bytes, Rate 192000 Hz, Stereo
aplay: set_params:1081: Sample format non available
Available formats:
- S16_LE
- S32_LE
Ok, I don't want to turn 24 bits into 16, so I decided to try the plughw with
the 192 / 24 file.
Eww there is that weirdly distorted version of Mozart's Violin
Concerto in D major
(sounds more like a bass kazoo than a violin)
CTRL-C and tried again: all good!
I can get it back to not working by playing a 44.1 / 16 file (once to get fuzz,
twice to get proper sound). So here we are, back with the bass kazoo version
and the "-v" flag on aplay:
clh@nice:~/WavTest$ sudo aplay -D plughw:CARD=Interface,DEV=0 -v 2L*.wav
Home directory /home/clh not ours.
Playing WAVE '2L38_01_192kHz.wav' : Signed 24 bit Little Endian in
3bytes, Rate 192000 Hz, Stereo
Plug PCM: Linear conversion PCM (S32_LE)
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S24_3LE
subformat : STD
channels : 2
rate : 192000
exact rate : 192000 (192000/1)
msbits : 24
buffer_size : 96000
period_size : 24000
period_time : 125000
tstamp_mode : NONE
period_step : 1
avail_min : 24000
period_event : 0
start_threshold : 96000
stop_threshold : 96000
silence_threshold: 0
silence_size : 0
boundary : 1572864000
Slave: Hardware PCM card 1 'Schiit USB Interface' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : MMAP_INTERLEAVED
format : S32_LE
subformat : STD
channels : 2
rate : 192000
exact rate : 192000 (192000/1)
msbits : 32
buffer_size : 96000
period_size : 24000
period_time : 125000
tstamp_mode : NONE
period_step : 1
avail_min : 24000
period_event : 0
start_threshold : 96000
stop_threshold : 96000
silence_threshold: 0
silence_size : 0
boundary : 1572864000
appl_ptr : 0
hw_ptr : 0
To me, the above output seems interesting; aplay
has the idea that all is at 192kHz.
Meanwhile, here is /proc/asound/card1/stream0, where
"something" still seems to think it is playing 176 / 24 data.
clh@nice:/proc/asound/card1$ cat stream0
CMEDIA Schiit USB Interface at usb-0000:00:13.5-5, high speed : USB Audio
Playback:
Status: Running
Interface = 1
Altset = 2
Packet Size = 208
Momentary freq = 176430 Hz (0x16.0dc0)
Feedback Format = 10.14
Packet Size = 0
Momentary freq = 192000 Hz (0x18.0000)
Interface 1
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 5 OUT (ASYNC)
Rates: 44100, 48000, 88200, 96000, 192000
Data packet interval: 125 us
Interface 1
Altset 2
Format: S32_LE
Channels: 2
Endpoint: 5 OUT (ASYNC)
Rates: 44100, 48000, 88200, 96000, 192000
Data packet interval: 125 us
if I crash out of the aplay and start it again, sounds great, and
we get back to the proper 192 momentary frequency in
/proc/asound/card1/stream0
clh@nice:/proc/asound/card1$ cat stream0
CMEDIA Schiit USB Interface at usb-0000:00:13.5-5, high speed : USB Audio
Playback:
Status: Running
Interface = 1
Altset = 2
Packet Size = 208
Momentary freq = 192031 Hz (0x18.0100)
Feedback Format = 8.16
Packet Size = 0
Momentary freq = 192000 Hz (0x18.0000)
Interface 1
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 5 OUT (ASYNC)
Rates: 44100, 48000, 88200, 96000, 192000
Data packet interval: 125 us
Interface 1
Altset 2
Format: S32_LE
Channels: 2
Endpoint: 5 OUT (ASYNC)
Rates: 44100, 48000, 88200, 96000, 192000
Data packet interval: 125 us
I guess I find it weird that aplay thinks it is playing
192kHz data but /proc/asound/card1/stream0 says
it's 172kHz.
The first time. But the second, things seem correct.
Daniel, I'm sorry this is such a pain in the neck!
Thanks for all the help!
--
Monet's Chemist
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
