Sounds vs Music and Bad Load Times can anything be done?

Preschoolu

Hey Forum. We are working on a project with 468 sounds. Initially I (the programmer) set it up with 468 or so different rule statements (divided into groups of 26) and I used sounds in m4a format. This works okay although load times can be somewhat long for entering into a scene. The problem with using music files for sounds though is when closing and re-opening the app (pressing home button on device), the last sound (music file) is played disrupting the flow of the app. These are educational apps designed for children and its best to eliminate this bug.. We have tried replacing all the music files with sound files instead but the load times for entering a scene with the sound actor showed a huge increase e.g 3.5 seconds and now 8-9 seconds! Can anything be done. Has everything been tried?