Transmit audio recording

micro:bit
1

Hi I am able to record and play audio recordings using the record extension.

def on_button_pressed_a():
    record.set_sample_rate(10000, record.AudioSampleRateScope.RECORDING)
    basic.show_icon(IconNames.SMALL_SQUARE)
    record.start_recording(record.BlockingState.BLOCKING)
    basic.clear_screen()
input.on_button_pressed(Button.A, on_button_pressed_a)

def on_button_pressed_b():
    record.set_sample_rate(20000, record.AudioSampleRateScope.PLAYBACK)
    basic.show_leds("""
        . # . . .
        . # # . .
        . # # # .
        . # # . .
        . # . . .
        """)
    record.play_audio(record.BlockingState.BLOCKING)
    basic.clear_screen()
input.on_button_pressed(Button.B, on_button_pressed_b)

But I cant find a way to access the audio buffer to transmit the audio sample values over serial. Please any guide?

2

Hello, I have the same need. Did you find a solution in the meantime?

3

Yes, I eventually found a solution

Check it out: https://github.com/martinwork/pxt-audio-recording