pvrecorder 1.0.2

Recorder library for Picovoice.

PV_Recorder

A cross platform audio recorder to read one channel and 16kHz samples.

Requirements

• Python 3

Compatibility

• Windows (amd64)
• macOS
  • x86_64
  • arm64
• Linux (x86_64)
• Raspberry Pi:
  • Zero
  • 2
  • 3 (32 and 64 bit)
  • 4 (32 and 64 bit)
• NVIDIA Jetson Nano
• BeagleBone

Installation

pip3 install pvrecorder

Usage

Getting the list of input devices does not require an instance:

from pvrecorder import PVRecorder

devices = PVRecorder.get_audio_devices()

To start recording initialize the instance and run start:

from pvrecorder import PvRecorder

recorder = PvRecorder(device_index=-1, frame_length=512)
recorder.start()

Get the pcm frames by calling the read function:

pcm = recorder.read()
# do something with pcm

To stop recording just run stop on the instance:

recorder.stop()

Once you are done, free the used resources. You do not have to call stop before delete:

recorder.delete()

Demo

For more detailed information on how to use the pv_recorder python sdk, please that a look at demo.py.

In the following instructions, we will refer to {AUDIO_DEVICE_INDEX} as the index of the audio device to use, and {OUTPUT_PATH} as the path to save the audio data in wav format.

{AUDIO_DEVICE_INDEX} defaults to -1 and {OUTPUT_PATH} can be empty if you wish to not save any data.

To show the available audio devices run:

python3 demo.py --show_audio_devices

To run audio recorder run:

python3 demo.py --audio_device_index {AUDIO_DEVICE_INDEX} --output_path {OUTPUT_PATH}