| Team, I am trying to record with alsa and Umik-1 (http://www.minidsp.com/products/acoustic-measurement/umik-1) on Debian and Raspbian (on Raspberry Pi hardware). in both cases, I am experiencing the following: - "lsusb" displays: [Bus 001 Device 005: ID 2752:0007] - "amixer" and "arecord -l -L" can see the device and i can adjust the capture level as well. - but recording with "arecord" does not happen. the recording starts, but no input is detected. pls see the attached log on each of the above steps. with same steps i was able to record with a "Samson C01u" microphone. kindly advise on troubleshooting or any possible next steps. thank you in advance, regards, zoltan |
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root@raspberrypi:~# lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 005: ID 2752:0007
----------------------------------------------------------------------
root@raspberrypi:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: U12dB [Umik-1 Gain: 12dB], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
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root@raspberrypi:~# arecord -L
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=U12dB
Umik-1 Gain: 12dB, USB Audio
Default Audio Device
sysdefault:CARD=U12dB
Umik-1 Gain: 12dB, USB Audio
Default Audio Device
front:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
Front speakers
surround40:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=U12dB,DEV=0
Umik-1 Gain: 12dB, USB Audio
IEC958 (S/PDIF) Digital Audio Output
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root@raspberrypi:~# amixer -c 1 set Mic Capture 100%
Simple mixer control 'Mic',0
Capabilities: cvolume cswitch cswitch-joined penum
Capture channels: Front Left - Front Right
Limits: Capture 0 - 55
Front Left: Capture 55 [100%] [24.00dB] [on]
Front Right: Capture 55 [100%] [24.00dB] [on]
----------------------------------------------------------------------
root@raspberrypi:~# amixer -c 1 set Mic Capture cap
Simple mixer control 'Mic',0
Capabilities: cvolume cswitch cswitch-joined penum
Capture channels: Front Left - Front Right
Limits: Capture 0 - 55
Front Left: Capture 55 [100%] [24.00dB] [on]
Front Right: Capture 55 [100%] [24.00dB] [on]
----------------------------------------------------------------------
root@raspberrypi:~# arecord -vv -D default:CARD=U12dB -d 5 test.wav
Recording WAVE 'test.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
Plug PCM: Rate conversion PCM (48000, sformat=U8)
Converter: linear-interpolation
Protocol version: 10002
Its setup is:
stream : CAPTURE
access : RW_INTERLEAVED
format : U8
subformat : STD
channels : 1
rate : 8000
exact rate : 8000 (8000/1)
msbits : 8
buffer_size : 2730
period_size : 170
period_time : 21333
tstamp_mode : NONE
period_step : 1
avail_min : 170
period_event : 0
start_threshold : 1
stop_threshold : 2730
silence_threshold: 0
silence_size : 0
boundary : 178913280
Slave: Route conversion PCM (sformat=S24_3LE)
Transformation table:
0 <- 0*0.5 + 1*0.5
Its setup is:
stream : CAPTURE
access : MMAP_INTERLEAVED
format : U8
subformat : STD
channels : 1
rate : 48000
exact rate : 48000 (48000/1)
msbits : 8
buffer_size : 16384
period_size : 1024
period_time : 21333
tstamp_mode : NONE
period_step : 1
avail_min : 1024
period_event : 0
start_threshold : 6
stop_threshold : 16384
silence_threshold: 0
silence_size : 0
boundary : 1073741824
Slave: Direct Snoop PCM
Its setup is:
stream : CAPTURE
access : MMAP_INTERLEAVED
format : S24_3LE
subformat : STD
channels : 2
rate : 48000
exact rate : 48000 (48000/1)
msbits : 24
buffer_size : 16384
period_size : 1024
period_time : 21333
tstamp_mode : NONE
period_step : 1
avail_min : 1024
period_event : 0
start_threshold : 6
stop_threshold : 16384
silence_threshold: 0
silence_size : 0
boundary : 1073741824
Hardware PCM card 1 'Umik-1 Gain: 12dB' device 0 subdevice 0
Its setup is:
stream : CAPTURE
access : MMAP_INTERLEAVED
format : S24_3LE
subformat : STD
channels : 2
rate : 48000
exact rate : 48000 (48000/1)
msbits : 24
buffer_size : 16384
period_size : 1024
period_time : 21333
tstamp_mode : ENABLE
period_step : 1
avail_min : 1024
period_event : 0
start_threshold : 1
stop_threshold : 1073741824
silence_threshold: 0
silence_size : 0
boundary : 1073741824
appl_ptr : 0
hw_ptr : 0
#+ | 00%
----------------------------------------------------------------------
root@raspberrypi:~# aplay -vv -D sysdefault:CARD=ALSA test.wav
Playing WAVE 'test.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
Plug PCM: Hardware PCM card 0 'bcm2835 ALSA' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : U8
subformat : STD
channels : 1
rate : 8000
exact rate : 8000 (8000/1)
msbits : 8
buffer_size : 4000
period_size : 1024
period_time : 128000
tstamp_mode : NONE
period_step : 1
avail_min : 1024
period_event : 0
start_threshold : 4000
stop_threshold : 4000
silence_threshold: 0
silence_size : 0
boundary : 2097152000
appl_ptr : 0
hw_ptr : 0
#+ | 00%
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