Title: Get and Set volume (soundcard)
Question: How do I get the soundcard's volume? How to set it ?
Answer:
procedure GetVolume(var volL, volR: Word);
var
hWO: HWAVEOUT;
waveF: TWAVEFORMATEX;
vol: DWORD;
begin
volL:= 0;
volR:= 0;
// init TWAVEFORMATEX
FillChar(waveF, SizeOf(waveF), 0);
// open WaveMapper = std output of playsound
waveOutOpen(@hWO, WAVE_MAPPER, @waveF, 0, 0, 0);
// get volume
waveOutGetVolume(hWO, @vol);
volL:= vol and $FFFF;
volR:= vol shr 16;
waveOutClose(hWO);
end;
procedure SetVolume(const volL, volR: Word);
var
hWO: HWAVEOUT;
waveF: TWAVEFORMATEX;
vol: DWORD;
begin
// init TWAVEFORMATEX
FillChar(waveF, SizeOf(waveF), 0);
// open WaveMapper = std output of playsound
waveOutOpen(@hWO, WAVE_MAPPER, @waveF, 0, 0, 0);
vol:= volL + volR shl 16;
// set volume
waveOutSetVolume(hWO, vol);
waveOutClose(hWO);
end;