Hello Several solutions ..If you have the audio in stereo you can have it analyzed by the site VOCALREMOVER and the melody line will be attenuated. This works better with stereo orchestration and voice. There is also the solution to recover Midi files of musette and to mute the channel 4 which is supposed to have the line of the melody, it will remain only the orchestration which you can transform into Mp3 with the free software KARPBO (by not forgetting the bank of sounds with the format SF2) If problem to contact me in MP