Bulky audio

Hi Everyone,

In my game I have >30 mins of audio altogether, which is usually not a problem, but on some devices with only 1GB memory, it crashes. Tried to reduce the sampling rate and lower the quality, but when I check in
game.cache.audio.entries
it seems that when loaded, it is stored as 48000 Hz again, so the compression is gone.
I could load instead the individual tracks on demand, but that would probably pause the game at points.
Any Ideas for a workaround?