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imx6 bluetooth with headset_head_unit profile

Question asked by Carlos Aguero on Mar 27, 2018
Latest reply on Apr 1, 2018 by jimmychan

Hi,

 

Has anyone recorded bluetooth audio successfully from a headset_head_unit device using an imx6, could you please provide advice?

 

I am using an imx6 dartboard for bluetooth audio capture with a bluetooth headset device, for some reason it seems that audio is being capture very fast, for example if I record audio for 12 seconds the resulting file is about 4-6 seconds, audio sounds very high pitched due to the fast audio, if I connect my cellphone audio is recorded as expected, that means I record 12 seconds and created file is 12 seconds and pitch is the same as the expected.

 

I am building software from https://github.com/varigit/variscite-bsp-platform.git rocko release and the bitbake command if for a var-som-mx6 board: MACHINE=var-som-mx6 DISTRO=fslc-framebuffer . setup-environment build_fb and linux is: Linux var-som-mx6 4.9.11-mx6+g8acc1a4 

 

For doing audio record I use a Gstreamer pipeline:

 

gst-launch-1.0 headset recording (fast audio):

gst-launch-1.0 -v pulsesrc device=bluez_source.50_1A_A5_F5_D1_1E.headset_head_unit ! 'audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)8000, channels=(int)1' ! flacenc ! filesink location=rec.flac

 

gst-launch-1.0 cellphone audio recording (working ok):

gst-launch-1.0 -v pulsesrc device=bluez_source.C0_EE_FB_42_C3_FD.a2dp_source ! 'audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)8000, channels=(int)1' ! flacenc ! filesink location=rec.flac

 

I have configured pulse audio for 8kHz and one channel at: /etc/pulse/ files. But even after that, when connecting a device with headset_head_unit profile audio is not being provided as expected, is hint and/or tip is highly appreciated

 

Regards,

Carlos A.

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