If two simultaneous notes are slightly out-of-tune, the lower-pitched one (assuming the higher one is properly pitched) is "flat" with respect to the other.
If the same note is played on two instruments at the same time, the lower-pitched one is flat compared to the higher-pitched one.
If the same note is played on two instruments at the same time, the lower-pitched one is flat compared to the higher-pitched one.
Usar una redacción más simple: If two simultaneous notes are slightly out-of-tune, the lower-pitched one (assuming the higher one is properly pitched) is "flat" with respect to the other. Producción: