more amazing things i basically give music to your song i have more than 1000 instruments which have to be gone through to select thebest for you
.A metronome is a click sound musicians use to synchronize vocal with. so that we could add music to the speed of click sound (its matching beat) If the vocals yougive me is not synced the i have to go through the whole song and cut and sync to beat.
your song may be out of tune which give a real head ache when giving music.It could be understood by good listeners. Voice EQ is equalize your voice tune to more comfortable type(like in new films).
spatialize audio or 3d audio,
pan in is playing at either one of the left or right speaker
5.1 audio is using different set of speackers to make almost 3d sound
but in real world we could locate origin of sound the same thing can be done in headphone using 3d audiospatialization