thetuningcd.com said:How does The Tuning C.D. work?
Put The Tuning C.D. in any C.D. player. Press Play. On track 1 you will hear a unique overtone series in the key of C.
Blend your instrument with The Tuning C.D. and you will instantly hear waves, called beats. Simply adjust your pitch to get rid of the beats. After one to two weeks of regular use, one will clearly notice a more discriminant ear.