au·di·o·tape 
(ôdē-ō-tāp′)
(ôdē-ō-tāp′)n.
1. A magnetic tape used to record sound for subsequent playback.
2. A tape recording of sound.
tr.v. au·di·o·taped, au·di·o·tap·ing, au·di·o·tapes
To record (sound) on magnetic tape: audiotaped the interview for replay on radio.