What is it?
Records a sound in the active sound document.

How to use it
When the record button is pressed, the recording process is automatically Paused.  Press the Pause button to start recording.  If the option key is held down, it only records the length of the selection.  Select one track to record in mono and two tracks to record in stereo.  The selected portion of a sound will be deleted and the new sound will be inserted.

Notes
If you are getting warnings when trying to record, it's because the sound document's sample rate or size is not supported by the input device.  Make sure the "Sound In" Preferences are set correctly.  You can also Resample to the correct sample rate and size.

If you would like to increase recording time, give it more memory in the Finder with "Get Info".

Recording will not work if your Mac does not have asynchronous sound input capabilities (able to record while other things are going on).  Some of the older or low cost Mac's may not have asynchronous sound input capabilities.

See "Sound In" Preferences for more information.