Sound is an important component of teaching science concepts so we have built-in collecting sound data to Notebook using your devices existing microphone.
To use this feature, open up the connection screen as if you were going to connect a PocketLab and instead of clicking the large button, use the carrot dropdown to open up some other options and select 'Use device sensors'.
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This will connect the graphing and data collection to your device (laptop, tablet, smartphone, etc) instead of a PocketLab. It will default to audio and start showing audio input right away. See the video below.