Hello there,
I'll be straight honest with you guys, it's no big deal to find a mixing/mastering expert who can professionally mix small sections of music tracks for you, almost all professionals here will be capable of doing that. What matters is if you are really connecting to the right feelings as it is a wedding that we're looking at! First things first, for your first dance, the tracks have to be a selection of songs that are the couple's FORTE. This means that they should be the tracks that both the groom and bride can sync into with authentic feelings, something they already love mutually because that will bring out confidence in them.
For other parts of the events, the tracks have to connect with the pleasant vibe of the occasion, that is: not too loud and cheery all the time, maybe for a few minutes, but mostly calm, soothing and with a glow of love in them. We can select songs like these however, for the first dance, I'll have to ask a couple questions from the couple. Let's make this happen!
Happy wedding!
Nayab K.