Whatever the detected pitch, we will set the "from" pitch to be an A and the "to" pitch to be the C#/Db above that A. That does not matter because we know the current key and the key we want to change to. However, music does not always start on the same note as the musical key it is in, so the detected note will not necessarily be an A. If we have music that we know is in the key of A, Audacity may estimate the pitch as A if the first note is an A. For example you could duplicate a vocal track and then apply Change Pitch with a value of +7 semitones (a major fifth) to create a harmony vocal.Ĭhange the known key from A to the C#/Db above that A Semitones (half-steps): If you do not know the key the original recording is in but you know how many semitones it needs to be changed, enter that value here."from" and "to" controls: The "from" and "to" controls each have a dropdown menu for selecting the musical note, then to right of that menu, a text box for selecting the octave of that note.For example, if you have a very short, quiet note on A3 followed by a longer, louder note on C4 Audacity will probably detect C4 but if the second note is the same volume then Audacity will probably detect A3. The frequency of the detected pitch is given in parentheses. The letter (with sharp " #" / flat " b" suffix as required) indicates the musical note and the number indicates the octave position of the note. Estimated Start Pitch: Attempts to detect the pitch of the most meaningful note at the start of the selection.If you know both the key the original recording is in and the key you want to change it to, change both the Pitch "from" and "to" values.