did you use some voice output for the game elements
or samples in different frequencies?
i don't know the reason why there is a limit for loading samples.
at pc the memory is not the problem.
other idea from me is to use SeekMusic (+GetMusicPosition to pause it after played),
put some waves together in one file mp3 file.
u can play at least 50 sound together in theory.
and i guess play to much samples together is similar to noise.
AGK (Steam) V2 Beta .. : Windows 10 Pro, 8.1 Pro 64 Bit : AMD (15.7.1) Radeon R7 265 : Mac mini OS X 10.10 (Yosemite)