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Sound Volume in Direct Sound 8

Started by Dominik_78 Dec 7, 2002 at 7:46 AM 2 replies 1k views

Original Post

Dec 7, 2002 at 7:46 AM

Hi, I am using: IDirectMusicLoader8* g_pLoader; IDirectMusicPerformance8* g_pPerformance; IDirectMusicSegment8* g_pSegment; to play my midi file. -> works fine. how can I ajust the sound volume of Direct Sound at runtime? just a hint for a function name would be enough i hope.

trondb

Dec 11, 2002 at 10:45 AM

I assume you have an audiopath defined when you initialize DirectAudio9, like for instance

IDirectMusicAudioPath8 *path;

If so, simply add
pPerformance->GetDefaultAudioPath(&path)));
path->SetVolume(0,0);

Parameter 1 is the value for volume, where 0 is full, in the range [0..-9600]. Parameter 2 is duration in milliseconds for the volume-change. 0 = immediate.

You should of course add some errorchecking to this, like
if(ERROR(....

Hope this was what you were looking for,

"That''s Tron. He fights for the users."

trondb

Dec 11, 2002 at 10:47 AM

BTW you should be able to use path->setVolume during runtime if you make *path a global var. Let me know. Thanks,

"That''s Tron. He fights for the users."

Dominik_78

Author

Dominik_78

Dec 11, 2002 at 11:43 AM

Thank you !

and yes it is possible to make modifications at runtime - but I found a function:

long value = -1000; // range from -20000 to 200

g_pPerformance->SetGlobalParam( GUID_PerfMasterVolume, (void*)&value, sizeof(long) );

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