class Recorder

The recorder can record audio from the microphone and encode the audio into wav or amr format.

class audio.Recorder

Constructors

class audio.Recorder(sample=8000, bits=16, stereo=False)

Create a Recorder object.

Parameters:

sample (int) – The sample rate of the audio data. The range is 8000-96000.
bits (int) – The bits of the audio data.
stereo (bool) – Whether the audio data is stereo.

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Methods

Recorder.record(uri: str, time: int, sync=True)

Record audio from microphone to file.

Parameters:

uri (str) – The uri of the audio file. e.g. “file://flash/test.amr”, “file:///sd/test.wav”.
time (int) – The duration of the recording, The unit is seconds.
sync (bool) – Whether to record synchronously.

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Recorder.create_pcm_buf(time) → bytearray

Create a buffer to store the audio data. The audio data is in PCM format.

The length of the data buffer is \(sample * bits * time / 8\)

Parameters:: time (int) – The duration of the recording, The unit is seconds.
Returns:: The buffer to store the audio data.

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Recorder.record_into(buf, sample=8000, bits=16, stereo=False, sync=True)

Play the raw audio data.

Parameters:

buf (bytes) – Read into buf from the microphone.
sample (int) – The sample rate of the audio data. The range is 8000-96000.
bits (int) – The bits of the audio data.
stereo (bool) – Whether the audio data is stereo.
sync (bool) – Whether to record synchronously.

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Recorder.pause()

Pause the Recorder.

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Recorder.resume()

Resume the Recorder.

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Recorder.stop()

Stop the Recorder.

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Recorder.rms() → float

Get the root mean square of the audio data.

Returns:: The root mean square of the audio data. The unit is dB.

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Recorder.volume() → int

Get the volume of the audio data.

Returns:: The volume of the audio data. The range is 0-100.

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Recorder.is_recording() → bool

Check if the Recorder is recording.

Returns:: True if the Recorder is recording, False otherwise.

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Recorder.config(sample=8000, bits=16, stereo=False) → bool

Configure the Recorder.

Parameters:

sample (int) – The sample rate of the audio data. The range is 8000-96000.
bits (int) – The bits of the audio data.
stereo (bool) – Whether the audio data is stereo.

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