Audio capture is a sensor codelet for capturing audio packets from microphones. The captured audio is published as 32-bit float data.
Parameter |
Description |
Default |
|---|---|---|
| capture_card_name | The name of the audio device used for capturing audio. Leave this empty if using the system’s default capture device. | |
| sample_rate | The sampling rate in Hz for capturing audio. | 16000 |
| num_channels | The number of audio channels to capture. | 6 |
| audio_frame_in_milliseconds | The duration of each audio packet in milliseconds. | 100 |
| ticks_per_frame | Number of times to query ALSA within the duration of 1 audio frame. | 5 |
Message |
Proto Type |
Name |
|---|---|---|
| Output | AudioDataProto | audio_capture |
The Audio Capture sample application captures audio from a microphone and saves it to a PCM file as
raw audio data. This application requires a microphone connected to the host/device and set as
the default audio input device in system settings. The specifications of the connected microphone
should be used to configure the audio capture component (num_channels and
sample_rate). The application is configured to capture 6 channel audio data at a 16kHz
sample rate. This data is captured as 100ms audio packets and saved to /tmp/audio-out-f32-16k.pcm.
Platforms: Desktop, Jetson TX/2, Jetson Xavier, Jetson Nano
Hardware: Any microphone