Just a suggestion but as sombody who has Autism, i find it hard to differentiate the footsteps of the pred and the students. Please could you try and make them sound different as i cant tell if its a student or a pred walking past.
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I am experimenting with changing the sound of footsteps for pred and students but it is hard to find footsteps that sound like they are stepping on the same floor type while sounding different from each other. This will be even more problematic if I add a different map and the floor type is different like grass.