Currently Being ModeratedJul 31, 2012 11:01 AM (in response to sirius33)
GarageBand should be sampling audio in typical CD quality, i.e. at 1,411.2 kbit/s. A back of envelope calculation suggests that might be enough space for 8 minutes of recording assuming none of that free space is needed by anything else. Maximum potential track length in GarageBand for iOS is 32 minutes so maybe there is a minimum requirement of say 320Mb free space in case it is all needed.