shishirbitm
Posts: 2
Joined: Thu Dec 06, 2018 9:15 am

Mic not capturing audio with Plantronics BT300M

Sat Dec 08, 2018 7:11 am

Hi, I am not able to record on raspberry pi 3b+ with following device. Although i can find my device configured below. Kindly help.

Playback works but record doesn’t work. Also I am trying to record programatically through java audio, that also doesn’t work. Recording file has constant slight noise and no recording sound.

Playback works fine but recording doesn’t:
Playback command: Works well
arecord –format=S16_LE –rate=16000 | aplay –format=S16_LE –rate=16000

Recording doesn’t work:
arecord –format=S16_LE –rate=16000 test.wav

Below are the device listing:
=================
aplay -l
=================
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
Subdevices: 7/7
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: BT300M [Plantronics BT300M], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
======================
pi@raspberrypi:~ $ arecord -l
======================
**** List of CAPTURE Hardware Devices ****
card 1: BT300M [Plantronics BT300M], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
==================
lsusb
==================
Bus 001 Device 004: ID 047f:0416 Plantronics, Inc.
Bus 001 Device 005: ID 0424:7800 Standard Microsystems Corp.
Bus 001 Device 003: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 002: ID 0424:2514 Standard Microsystems Corp. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

alsamixer is also fine, I can see both capture and playback is correctly configured.

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