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Index › Programming Questions & Help › Sound,  Music Libraries › Moved latency on AudioSample triggers
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Moved latency on AudioSample triggers (Read 774 times)
asn83
Moved latency on AudioSample triggers
Nov 12th, 2007, 5:02pm  
Does anyone know how to get rid of the latency when triggering an AudioSample?  I'm making a game, and trying to trigger a sound effect whenever the player fires his weapon.
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ddf
Moved latency on AudioSample triggers
Reply #1 - Nov 16th, 2007, 1:58am  
Hmm, the latency shouldn't be all that bad. I made a real simple sketch that triggers samples with key presses and it feels pretty responsive. Are you sure that the sample you are using doesn't have a fraction of a second of silence at the beginning?
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asn83
Moved latency on AudioSample triggers
Reply #2 - Nov 16th, 2007, 2:00am  
I'm sure, I've edited the sound quite a bit.  I've kept trying to fix this, but have yet to solve it.
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JohnG
Moved latency on AudioSample triggers
Reply #3 - Nov 16th, 2007, 11:13am  
I'd suggest using an AudioSnippet for game samples.
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asn83
Moved latency on AudioSample triggers
Reply #4 - Nov 16th, 2007, 8:01pm  
Interesting.  I will definitely check that out.  I hadn't considered them because the Java docs say, "An AudioSnippet is a good choice if all you need to do is play a short sound at some point. If your aim is to repeatedly trigger a sound, you should use an AudioSample instead."

I want to trigger a sound every time the player fires his laser canon, so would I need to call sound.play(), sound.pause(), and sound.rewind() after every shot?  

Thanks!!
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ddf
Moved latency on AudioSample triggers
Reply #5 - Nov 17th, 2007, 4:44pm  
Yes, that would be the case. And if the player shot again before the sound finished playing, you wouldn't get it to play a second time. If the sound is really short you might could load it into several AudioSnippets and when an overlap situation happens, simply play one that isn't currently playing. How many you'd need would depend on how long your sample is and how quickly the player can fire.
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asn83
Moved latency on AudioSample triggers
Reply #6 - Nov 19th, 2007, 12:13am  
This works great, thank you!! Out of curiosity, why do snippets work better than samples like this?

Also, this brings up a new (related?) problem - I now keep getting a Minim error telling me the I/O stream closed.  What would be causing this?
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ddf
Moved latency on AudioSample triggers
Reply #7 - Nov 23rd, 2007, 9:02pm  
AudioSnippets are faster because they use a JavaSound Clip for playing audio. The sound is buffered in memory and no samples are made available to the user. This means that the audio doesn't need to be converted to normalized floats on its way in or out, basically just piping bytes from memory to an audio output.

http://java.sun.com/j2se/1.5.0/docs/api/javax/sound/sampled/Clip.html

I'd have to see some of your code to answer about the Minim error.
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