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Audio panel

Display and play audio waveforms from incoming RawAudio and CompressedAudio message topics.

audio panel

In Comparison mode, use the Data source picker in the panel toolbar to choose which slot to display.

Settings​

General​

fielddescription
TopicTopic containing RawAudio or CompressedAudio messages
ColorColor of the audio waveform visualization
VolumeAudio playback volume (0.0 to 1.0)
MuteMute audio playback
Window sizeTime range in seconds for the sliding window (live sources only)

Supported schemas​

The Audio panel supports the following message schemas:

  • foxglove_msgs/RawAudio
  • foxglove_msgs/msg/RawAudio
  • foxglove.RawAudio
  • foxglove::RawAudio
  • foxglove_msgs/CompressedAudio
  • foxglove_msgs/msg/CompressedAudio
  • foxglove.CompressedAudio
  • foxglove::CompressedAudio

Supported formats​

The Audio panel reads the pcm-s16, g711-alaw, and g711-ulaw format values. See foxglove.RawAudio for how each one lays out its data, sample_rate, and number_of_channels fields.

G.711 waveform display and playback both go through the browser's WebCodecs implementation, so a message plays only if the browser accepts its sample rate and channel configuration.