A single frequency tone, recorded at the head of a tape and used for alignment purposes when the tape is replayed at a later date.
"I want to preface my review with a little history. The 8 track tape that CVC transferred the music from to a CD was approximately 36 years old. The last time I remember playing it was around 1984. In the meantime, it remained packed in a box and was eventually placed in the “antic shelf”. I did try to play it one time but my 8 track player ..."
