On Mon, Apr 13, 2020 at 4:29 PM Michael <confabul...@kintzios.com> wrote:
>
> Yes, the first step would be to reduce or set to zero the Mic Boost in
> alsamixer and adjust the Capture volume. However, noise with arecord is
> usually a result of incorrect bitrate?
>
> You could try:
>
> arecord -fdat -r 48 test.wav
OK, I tried "arecord -D hw:0,1 -fdat -r 48 test.wav" and "arecord -D
hw:0,2 -fdat -r 48 test.wav". aplay produces noise, in both cases. I
alse tried with -r 44, same result.
## arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: Generic Analog [Generic Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 2: Generic Alt Analog [Generic Alt Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
## arecord -L
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=PCH
HDA Intel PCH, Generic Analog
Default Audio Device
sysdefault:CARD=PCH
HDA Intel PCH, Generic Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, Generic Analog
Front speakers
usbstream:CARD=PCH
HDA Intel PCH
USB Stream Output
I assume the two capture devices are LineIn and Mic (mono). Correct?
(But why the device numbers 0 and 2, and not 1?)
OTOH,
## arecord -fdat -r 48 test.wav
ALSA lib
/var/tmp/portage/media-libs/alsa-lib-1.2.1.2/work/alsa-lib-1.2.1.2/src/pcm/pcm_dsnoop.c:641:(snd_pcm_dsnoop_open)
unable to open slave
arecord: main:828: audio open error: No such file or directory
I didn't use any flags for aplay, because aplay foo.wav works fine
when foo.wav is music from a CD (i.e., not from a micro)
>
> Also, make sure any hardware buttons have been enabled and the mic is not
> muted. Additional options may be required to use the correct input device and
> driver, which can be specified in /etc/modprobe.d/alsa.conf
I have /etc/modprobe.d/alsa.conf (not changed) but I have alsa support
built in the kernel, not as a module (could this be a problem?!)
Jorge
