when compress im disabled, result is same
This is likely due to resampling when importing the asset into FMOD Studio. Some sounds and their harmonics react to linear resampling in this way but switching it to cubic resampling may help.
You are able to set the resampler to use cubic resampling by setting it before initializing FMOD in your game.
FMOD_ADVANCEDSETTINGS settings; memset(&settings, 0, sizeof(settings)); settings.cbSize = sizeof(settings); settings.resamplerMethod = FMOD_DSP_RESAMPLER_CUBIC; gSystem->setAdvancedSettings(&settings);
This may cause some performance hits. It really depends on how much of an issue this change in sound is.