Sound recorder records only silence
Hi,
I hope someone can help with this problem...
I'm trying to get the microphone input working (actually for use with
Skype). I'm using audacity, arecord, and the gnome sound recorder to
test the mic input and whichever app I use it records only silence.
In the Gnome volume control:
Playback tab - Microphone slider is set to 100, and not muted
Capture tab - Both sliders set to 100 and not muted
Switches tab - Microphone Capture is ticked
Options tab - Mic Select set to Mic1, Mono select set to Mic
Blowing or touching the microphone can be clearly heard on the PC
speakers, holding the mic next to the speakers causes a feedback
'howl', speech is distorted.
However, any recording records just silence:
~# arecord -d 10 test.wav
Recording WAVE 'test.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
~# hd test.wav
00000000 52 49 46 46 a4 38 01 00 57 41 56 45 66 6d 74 20 |RIFF.8..WAVEfmt |
00000010 10 00 00 00 01 00 01 00 40 1f 00 00 40 1f 00 00 |........@...@...|
00000020 01 00 08 00 64 61 74 61 80 38 01 00 80 80 80 80 |....data.8......|
00000030 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 |................|
*
000138a0 80 80 80 80 80 80 80 80 80 80 80 80 |............|
000138ac
~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: CS46xx [Sound Fusion CS46xx], device 0: CS46xx [CS46xx]
Subdevices: 1/1
Subdevice #0: subdevice #0
~# amixer info
Card default 'CS46xx'/'Sound Fusion CS46xx at 0xfcffe000/0xfce00000, irq 193'
Mixer name : 'Cirrus Logic CS4297A rev 4'
Components : 'AC97a:43525914'
Controls : 45
Simple ctrls : 26
~# man amixer
Reformatting amixer(1), please wait...
~# amixer scontents
Simple mixer control 'Master',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 63
Mono:
Front Left: Playback 48 [76%] [on]
Front Right: Playback 48 [76%] [on]
Simple mixer control 'Master Mono',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 31
Mono: Playback 24 [77%] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 24 [77%] [on]
Front Right: Playback 24 [77%] [on]
Simple mixer control '3D Control - Center',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 0 [0%]
Simple mixer control '3D Control - Depth',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 0 [0%]
Simple mixer control '3D Control - Switch',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'PCM',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 28 [90%] [on]
Front Right: Playback 28 [90%] [on]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 0 [0%] [off] Capture [off]
Front Right: Playback 0 [0%] [off] Capture [off]
Simple mixer control 'CD',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 25 [81%] [on] Capture [off]
Front Right: Playback 25 [81%] [on] Capture [off]
Simple mixer control 'Mic',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Mono
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [on]
Front Left: Capture [on]
Front Right: Capture [on]
Simple mixer control 'Mic Boost (+20dB)',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Mic Select',0
Capabilities: enum
Items: 'Mic1' 'Mic2'
Item0: 'Mic1'
Simple mixer control 'Video',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 0 [0%] [off] Capture [off]
Front Right: Playback 0 [0%] [off] Capture [off]
Simple mixer control 'Phone',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Mono
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono: Playback 0 [0%] [off]
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958 Input',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958 Output',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'PC Speaker',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 15
Mono: Playback 0 [0%] [off]
Simple mixer control 'Aux',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 0 [0%] [off] Capture [off]
Front Right: Playback 0 [0%] [off] Capture [off]
Simple mixer control 'Mono Output Select',0
Capabilities: enum
Items: 'Mix' 'Mic'
Item0: 'Mic'
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch cswitch-joined
Capture channels: Front Left - Front Right
Limits: Capture 0 - 15
Front Left: Capture 15 [100%] [on]
Front Right: Capture 15 [100%] [on]
Simple mixer control 'Mix',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Mix Mono',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'ADC',0
Capabilities: volume cswitch cswitch-joined
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 32767
Front Left: 32767 [100%] Capture [off]
Front Right: 32767 [100%] Capture [off]
Simple mixer control 'DAC',0
Capabilities: volume cswitch cswitch-joined
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 32767
Front Left: 29491 [90%] Capture [off]
Front Right: 29491 [90%] Capture [off]
Simple mixer control 'External Amplifier',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
~# lsmod
Module Size Used by
snd_cs46xx 76360 1
gameport 14632 2 snd_cs46xx
snd_seq_dummy 3844 0
snd_seq_oss 28768 0
snd_seq_midi 8192 0
snd_seq_midi_event 7008 2 snd_seq_oss,snd_seq_midi
snd_seq 45680 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_rawmidi 22560 2 snd_cs46xx,snd_seq_midi
snd_seq_device 7820 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq,snd_rawmidi
snd_ac97_codec 83104 1 snd_cs46xx
snd_ac97_bus 2400 1 snd_ac97_codec
snd_pcm_oss 38368 0
snd_mixer_oss 15200 1 snd_pcm_oss
snd_pcm 68676 3 snd_cs46xx,snd_ac97_codec,snd_pcm_oss
snd_timer 20996 2 snd_seq,snd_pcm
snd 47012 12 snd_cs46xx,snd_seq_oss,snd_seq,snd_rawmidi,snd_seq_device,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore 9248 1 snd
snd_page_alloc 9640 2 snd_cs46xx,snd_pcm
ipv6 226016 20
ipt_LOG 6112 0
xt_tcpudp 3136 0
xt_state 2272 0
iptable_filter 3104 1
iptable_nat 7044 0
ip_nat 16876 1 iptable_nat
ip_conntrack 49088 3 xt_state,iptable_nat,ip_nat
nfnetlink 6680 2 ip_nat,ip_conntrack
iptable_mangle 2880 0
ip_tables 13028 3 iptable_filter,iptable_nat,iptable_mangle
x_tables 13316 5 ipt_LOG,xt_tcpudp,xt_state,iptable_nat,ip_tables
ppdev 8676 0
lp 11012 0
button 6672 0
ac 5188 0
battery 9636 0
dm_snapshot 15552 0
dm_mirror 19152 0
dm_mod 50232 2 dm_snapshot,dm_mirror
loop 15048 0
sd_mod 19040 0
tsdev 7520 0
parport_pc 32132 1
parport 33256 3 ppdev,lp,parport_pc
floppy 53156 0
intel_rng 5088 0
serio_raw 6660 0
i2c_i801 7468 0
intel_agp 21148 1
agpgart 29896 1 intel_agp
i2c_core 19680 1 i2c_i801
pcspkr 3072 0
psmouse 35016 0
shpchp 33024 0
pci_hotplug 28704 1 shpchp
evdev 9088 1
ext3 119240 15
jbd 52456 1 ext3
mbcache 8356 1 ext3
usb_storage 71840 0
scsi_mod 124168 2 sd_mod,usb_storage
ide_cd 36064 0
cdrom 32544 1 ide_cd
ide_disk 14848 17
uhci_hcd 21164 0
3c59x 40360 0
mii 5344 1 3c59x
usbcore 112644 3 usb_storage,uhci_hcd
piix 9444 0 [permanent]
generic 5476 0 [permanent]
ide_core 110504 5 usb_storage,ide_cd,ide_disk,piix,generic
thermal 13608 0
processor 28840 1 thermal
fan 4804 0
~# ps alx | grep art
0 0 11137 3845 18 0 2848 712 pipe_w S+ pts/2 0:00 grep art
~# ps alx | grep esd
0 0 11143 3845 18 0 2848 708 - R+ pts/2 0:00 grep esd
~# ps alx | grep alsa
0 0 11147 3845 18 0 2852 716 pipe_w S+ pts/2 0:00 grep alsa
~# uname -a
Linux baron 2.6.18-4-686 #1 SMP Wed May 9 23:03:12 UTC 2007 i686 GNU/Linux
~#
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