- check device name and which is recording device
user@user:~/$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: Device [USB Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: OnBoard [USB Audio OnBoard], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: OnBoard [USB Audio OnBoard], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0# plughw:[sound-card-number,device-number]
arecord -t wav -c 1 -D plughw:2,0 -f S16_LE -d 5 -r 16000 test.wav- In my case, USB Audio Device is recording device. Then find out check device name in pulseaudio
user@user:~/$ pacmd list-sources
...
index: 7
name: <alsa_input.usb-GeneralPlus_USB_Audio_Device-00.analog-mono>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9049
volume: mono: 52058 / 79% / -6.00 dB
balance 0.00
base volume: 18471 / 28% / -33.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 0 KiB
sample spec: s16le 1ch 44100Hz
channel map: mono
Mono
used by: 0
linked by: 0
configured latency: 0.00 ms; range is 0.50 .. 2000.00 ms
card: 0 <alsa_card.usb-GeneralPlus_USB_Audio_Device-00>
module: 13
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "USB Audio Device"
alsa.long_card_name = "GeneralPlus USB Audio Device at usb-ff540000.usb-1.2, full speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "platform-ff540000.usb-usb-0:1.2:1.0"
sysfs.path = "/devices/platform/ff540000.usb/usb1/1-1/1-1.2/1-1.2:1.0/sound/card0"
udev.id = "usb-GeneralPlus_USB_Audio_Device-00"
device.bus = "usb"
device.vendor.id = "1b3f"
device.vendor.name = "Generalplus Technology Inc."
device.product.id = "2008"
device.product.name = "USB Audio Device"
device.serial = "GeneralPlus_USB_Audio_Device"
device.string = "hw:0"
device.buffering.buffer_size = "176400"
device.buffering.fragment_size = "88200"
device.access_mode = "mmap+timer"
device.profile.name = "analog-mono"
device.profile.description = "Analog Mono"
device.description = "USB Audio Device Analog Mono"
alsa.mixer_name = "USB Mixer"
alsa.components = "USB1b3f:2008"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
ports:
analog-input-mic: Microphone (priority 8700, latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-input-microphone"
active port: <analog-input-mic>
- Then add device name to "const char dev (/< Sink (resp. source) name, or NULL for default */) parameters in pa_simple_new.
std::string device = "alsa_input.usb-GeneralPlus_USB_Audio_Device-00.analog-mono";
if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, device.c_str(), "record", &ss,
NULL, &buf_attr, &error))) {
fprintf(stderr, __FILE__ ": pa_simple_new() failed: %s\n",
pa_strerror(error));
finish(s);
return -1;
}- Good!
sudo apt install -y libpulse-dev
g++ pulseaudio-record-example.cc -o pulseaudio-record-example -lm -std=c++11 -ldl -lstdc++ -lpulse -lpulse-simple
sudo apt install -y libpulse-dev
g++ -fopenmp pulseaudio-stream-example.cc -o pulseaudio-stream-example -lm -std=c++11 -ldl -lstdc++ -lpulse -lpulse-simple
sudo apt-get install -y libasound-dev
g++ alsa-record-example.cc -I/usr/include/ -o alsa-record-example -lm -ldl -lasound
apt install -y portaudio19-dev
g++ portaudio-record-exmple.cc -I/usr/include/ -o portaudio-record-exmple -lm -ldl -lportaudio
- pipewire
- soundfile format: soundfile example