No, that didn't actually work either. I picked up some cheap
(10/$1.00) electrets on Aliexpress that are a CZN-15e
https://www.sunrom.com/p/czn-15e-omnidirectional-electret-condenser-microphone-9x7mm-with-pins-9767-capacitive-sensitivity-58
(just a data source)
Expendable microphones that aren't
OK,
arecord -f S16_LE --channels=2 --device="hw:2,0" --rate=44100 junk.wav
does work. It's not pretty, I have to amplify in Audacity about 40
db. My coupling capacitor seems to be leaky, I see DC on the waveform
and I get some motorboating. But I did it twice and both times
worked. What I did f
Alan and list,
On Mon, Jul 20, 2020 at 9:45 AM Alan Corey wrote:
> When I do
> arecord -f S16_LE --channels=2 --device="hw:2,0" --rate=44100 junk.wav
>
> It doesn't complain but the recording is silence. Something may be
> turned down or off in the mixer. Or I'm recording the wrong
> subde
When I do
arecord -f S16_LE --channels=2 --device="hw:2,0" --rate=44100 junk.wav
It doesn't complain but the recording is silence. Something may be
turned down or off in the mixer. Or I'm recording the wrong
subdevice. hw:2,1 and hw:2,2 don't seem to be found. If I amplify
(40 db) in Audac
Hmm, none of these are 1 channel. I do want 2 channels but so far
I've got 1 electret cartridge on prototype board trying to figure out
how much amplification I need.
USB Sound Device at usb-3f98.usb-1.5, full speed : USB Audio
Playback:
Status: Stop
Interface 1
Altset 1
Format:
Alan Corey wrote:
> arecord -f S16_LE -d 10 -r 16000 --channels=1 --device="hw:2,0"
> /tmp/test-mic.wav
> Recording WAVE '/tmp/test-mic.wav' : Signed 16 bit Little Endian, Rate 16000
> Hz, Mono
> arecord: set_params:1345: Channels count non available
I suspect recording always uses channels.
Ple
Nope. hadn't seen it. The last thing I tried was
arecord -f S16_LE -d 10 -r 16000 --channels=1 --device="hw:2,0"
/tmp/test-mic.wav
Recording WAVE '/tmp/test-mic.wav' : Signed 16 bit Little Endian, Rate
16000 Hz, Mono
arecord: set_params:1345: Channels count non available
yet
hw:2,1 (or ,2 or ,3)
Alan and list
On Sun, Jul 19, 2020, 10:26 Alan Corey wrote:
> I have a StarTech ICUSBAUDIO7D
>
> https://www.startech.com/Cards-Adapters/Sound/USB-Audio/USB-7-Channel-Audio-Adapter-with-SPDIF~ICUSBAUDIO7D
> which I want to use the mic input on. Mostly I'm vague on the Alsa
> syntax for specifyin
I have a StarTech ICUSBAUDIO7D
https://www.startech.com/Cards-Adapters/Sound/USB-Audio/USB-7-Channel-Audio-Adapter-with-SPDIF~ICUSBAUDIO7D
which I want to use the mic input on. Mostly I'm vague on the Alsa
syntax for specifying devices and especially subdevices.
My alsa-info output is at
http://al
