Remixing can be a challenge in the since that dance music is usually uptempo any where from 120 BPM to135 BPM so when you are selecting music to remix it helps if the songs are close to that range it will be easier to match up with the vocals. Then it will take some time to finding tempos at which a song will work, what style that vocal can flourish in, and finding the right process that leaves the vocal sounding natural at the new tempo and in the new style. Now you can use a slow tempo say like 60 BPM and then double the music tracks to 120 BPM but if you try to speed the vocal up you will encounter phrasing problems you really want the singer to sound natural.
A lot will depend on the vocal busy lyrics and lots of syllables can make it harder to work much faster tempos. You want to look for a double-tempo track. But a sparser style of lyrics and vocals that could still work at a faster tempo. As a DJ www.musicanddjinstructionalmedia.com your instinct is to gradually increase in tempo it is also a natural thing as you get into something your playing the album, you start, it's grooving, you get into it, the excitement level increases, and with that the tempo can increase as well so try to keep this in mind when your doing the remix. So break beats are around 128 BPM then a House feel around 135 BPM and then the uptempo ones at 145 BPM you start out strong and build to get the crowd into a Dance floor Moment and then you want to bring them back down slowly. Now there is a lot of programs that you can do this with but in my opinion the best one is Ableton Live because of it's flexibility it offers. Also Ableton has a process called warp markers that detect your major beats automatically and will let you try different beats on the fly. Happy Mixing.
