Some interesting things…
WireTap, according to their site: is a free product for MacOS X 10.2 or later that allows you to record any audio playing on your Mac, saving it to a file for later listening or processing. This allows you to record news from Internet radio stations such as the BBC News, sound snippets from your favorite DVD movie, record the audio from a game, or even iChatAV conversations.
Audacity is a free audio editor running on Mac, WIn, or Linux. The website says: You can record sounds, play sounds, import and export WAV, AIFF, Ogg Vorbis, and MP3 files, and more. Use it to edit your sounds using Cut, Copy and Paste (with unlimited Undo), mix tracks together, or apply effects to your recordings. It also has a built-in amplitude envelope editor, a customizable spectrogram mode and a frequency analysis window for audio analysis applications. Built-in effects include Echo, Change Tempo, and Noise Removal, and it also supports VST and LADSPA plug-in effects.
RadioSHARK is a USB AM/FM Radio with Time Shift Recording for Mac or PC. Lists for $69.99. The web site says: The RadioSHARK can record any AM or FM radio broadcast in real time. You can also program it to record a scheduled show, or to ‘pause’ live radio so you can return right where you left off moments or even hours before.