This operation uses operation guess key to find out the best song key which would require minimal # or b on a score sheet.
The song key and the chosen new key will be converted into parallel major keys and then the difference of half tones for transposing calculated.
Hint: Guess key does not always find the song key that a musician would choose. Especially a song that contains half tones that uses half tones which usually not match the song key (e.g. if a CMaj melody still uses F#, or simply a medley of songs using differnt song scales) can lead to different results. Therefore also the result of reaching the chosen song key could be other than musician result.
Hint: This operation transposes also some chord formats.
Hint: This operation is also available in batch operations.