Complex sentence: The group had already initiated recording sessions for the album when Ampex manufactured and released the first multitrack recording machine, offering 16 tracks of recording and playback (model number MM-1000).
Split into simpler sentences: The group had already initiated recording sessions for the album when Ampex manufactured and released the first 16-track multitrack recording machine. It offered 16 discreet tracks for recording and playback (model number MM-1000).