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Adjust Background music volume

by Hugo Munoz · in iTorque 2D · 07/01/2010 (1:15 pm) · 7 replies

Hey guys, Im trying to dynamically adjust the background music volume of my game.

To play BGM I'm using the following code:

function playBackgroundMusic()
{
$musicStreamFile = "~/data/audio/background/" @ $CurrentLevel @ ".mp3";
echo ($musicStreamFile);
%loop = true;
startiPhoneAudioStream($musicStreamFile,%loop);
}


But turns that I need to adjust the volume of the music when one of the characters is speaking, so is there any way to control the volume of an iPhoneAudioStream via script ?

Thanks

Hugo.
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Torque Owner Mark Grossnickle
#1
05/26/2011 (4:30 pm)
I have the same question. I see we can set volume per channel for effects. But from the code, it doesn't appear that "startiPhoneAudioStream" plugs into the channels. Is this correct?

I also tried adjusting defaultPrefs:

// Audio profiles for default  
   $pref::Audio::sfxVolume                   = 0.8;  // I tried to change them both to 0.1 but did not notice a change
   $pref::Audio::musicVolume                 = 0.8;

I also tried to change the master volume in defaultPrefs. None of these constants seemed to affect 'startiPhoneAudioStream' volume.

Going to be digging into this some more, but hoping someone can guide me a bit. Cheers!

Torque Owner Mark Grossnickle
#2
05/26/2011 (4:40 pm)
This is the function I believe I need to expose to script: SoundEngine_SetBackgroundMusicVolume. Hoping I am headed down the right trail. :)

Torque Owner Richard Skala
Pixel Vandals Inc.
#3
05/26/2011 (5:45 pm)
I think in order to change the volume in script, you need to call alxSetChannelVolume( %channel_ID , %volume ).

Torque Owner Richard Skala
Pixel Vandals Inc.
#4
05/26/2011 (5:47 pm)
Oh, I didn't thoroughly read the post -- I don't know how to change the volume on streams, if it's different.

Torque Owner Richard Skala
Pixel Vandals Inc.
#5
05/26/2011 (5:52 pm)
Looking through the code, it doesn't look like these are used at all:

$pref::Audio::sfxVolume = 0.8;
$pref::Audio::musicVolume = 0.8;

Torque Owner Mark Grossnickle
#6
05/26/2011 (7:47 pm)
The 'SoundEngine_SetBackgroundMusicVolume' function is working for me so far. Made a console function to access it.

Don't want to post it as the solution yet though since I haven't implemented the rest of our audio and am concerned this change may effect other audio. Will post once I test and get my head around this.

Kind of surprised this hasn't come up before... am I missing something or how do most iTorque devs tackle change the volume for their background music?

Torque Owner Don Schaper
XIX Software
#7
10/23/2011 (8:55 am)
Hi Mark,

If you can post your 'SoundEngine_SetBackgroundMusicVolume' console function, even if it isn't perfect I'm sure that many people would be extremely grateful.