scripts/SS_SetSoundFreq.gml
From spelunky.gmk, Spelunky Classic 1.1's source, © 2008, 2009 Derek Yu and Mossmouth, LLC, shown whole under the Spelunky User License v1.1b. Extracted by spelunky.ai's tools, an unofficial fan project, one file per script or event; the // ==== lines are the extractor's, naming each action of the event. Some scripts are others' work that Derek Yu credits in the source's readme.txt: Martin Piecyk's platform engine, ChevyRay's view scaling scripts and tsg1zzn's Super Sound System. This script is part of tsg1zzn's Super Sound System.
The script SS_SetSoundFreq, 20 lines of GML.
//Set the frequency of a sound (in Hz)/*argument0: Sound handle as returned by LoadSoundargument1: Hz as real or string. Valid values are from 1000 Hz to 100 000 Hz*//*return: "0" as string for failure and "1" as string for success.*/if is_real(argument0) then return "0";if is_string(argument1) then begin return external_call(global.dll_SS_SetSoundFreq,argument0,argument1);end else begin return external_call(global.dll_SS_SetSoundFreq,argument0,string(argument1));end;