App to match volume/mix songs in playlist?

[dickiefunk]

Hi,

I'm wondering if there is an app available that can automatically match the level's of songs on your playlist (IOS and Android). Also, it would be really great if it could mix from one song into the next automatically.

The reason why I'm asking this is because I sometimes get asked to do a playlist after gigs and it would be great if there was an app that could do this as the levels can vary quite a lot between different tracks! Also, there are gaps between the songs so if the app could also mix from one song to the next that would be excellent!