Headset Audio gateway btscosnd waveinopen failed

Hello,

I want to use the Headset profile using the Audio gateway service and
the btscosnd bluetooth audio driver.

I am connecting successfully to the headset using the audio gateway,
and I can hear music played with the Headset's speakers. That means
the WaveOutOpen and the audio routing works .

But the problem is when I tried to record the sound with the Headset
microphone, the waveInopen() failed error = WAVERR_BADFORMAT .

I used waverec.exe -b 8. because using wavinGetcaps() give me the
format = 0x00000001 => WAVE_FORMAT_1M08 => 1 channel mono 8 bits
11.025KHz
that my device support.

I don't understand why the "waveInOpen() " failed with
WAVERR_BADFORMAT error whereas I am using the good format ?

Did I forget something before connecting with the audio gateway
( enable SCO incoming connection ? , mixer API ?, wave API ? )
If someone could help me, thank you.

.

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