This will start a new node that listens to the /audio topic, and plays the incoming messages. Open a new terminal, and source your ROS workspace variables. Once the audio_capture node is running, we can use the audio_play node to listen to the output. Check for its existence using:Ĭheck to see if it is streaming any data:ĭo not kill this node, and continue to the next section. Start capturing audio data using the following command Once it is working, control-c the script to stop it. It may be helpful to debug whether audio from your source is being received using an external audio recording program such as audacity. By default, it’s set to 1 channel, 16 bit and 44100 Hz, which is CD quality. On the Advanced tab, you can change the default format for the audio. On the Levels tab, you can adjust the sensitivity of the microphone depending on your needs. If no audio is heard, make sure your system settings take audio input from your intended source as default. Click the Apply button and any sound picked up by your mic should play through your speakers in real time. The above command should play audio from the microphone through the speakers. If the above command doesn't work, try using the command "gst-launch-1.0" instead of the command "gst-launch-0.10". Gst-launch-0.10 alsasrc ! audioconvert ! audioresample ! alsasink You may want to turn down your volume as well. Test that gstreamer is working successfully with ALSA by capturing audio from your microphone and playing it back through your speakers.īefore executing the following command, make sure your microphone is enabled and selected as your default audio input device.
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