Not sure but you don't need orpheu. You could play with pev_flTimeStepSound.
Here some code :
http://forums.alliedmods.net/showpos...8&postcount=73
Using orpheu, I would set mp_footsteps to 0, then hooking PM_PlayStepSound() as pre, and playing my own sound here. Original sound should not played since there is a check at the start with pmove->movevars->footsteps. I guess it would be a nice method.
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