Help clearing up my understanding of sounds

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DavidAGK

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Posted: 15th Jun 2018 21:45

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Have I got my thinking straight here....

When I load a sound... SoundID = Loadsound("sound.wav") it occupies some memory

When I play the sound... ID = Playsound(SoundID) - does that occupy more memory?

Guessing it does (on the sound card?) BUT am I right in saying that when the sound gets to its end, it auto deletes itself and frees up any memory it occupied?

If I then play the sound a few more times...
ID = Playsound(SoundID)
ID = Playsound(SoundID)
ID = Playsound(SoundID)
I'm guessing the same applies and I don't need to do any clean-up afterwards because AppGameKit will delete the sound instances (when they get to their ends) and therefore free up any memory they occupied?

So... when all sounds have got to the end of playing - they all get 'unloaded' and all I have to do it delete the original sound... DeleteSound( SoundID) and I'm back to zero memory used?

So... have I understood it correctly or no?

Using Tier 1 AppGameKit V2
Started coding with AMOS (Thanks Francois Lionet)

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puzzler2018

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Posted: 16th Jun 2018 11:38

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Im not 100% sure - but i beleive

1 - LoadSound adds to memory

2 - Playsound - the O/S and AppGameKit takes care of that for us by playing whats in memory from Load (1) (doesnt use any more memory)

3 - DeleteSound - deletes the memory created by Load (1)

So all you need to worry about is

+ Code Snippet


SoundID = Loadsound("sound.wav")

// integer PlaySound( iID, iVol, iLoop ), so

PlaySound ( SoundID, 100, 1) // Volume 100 and 1=Loop forever 

do
     if getrawkeypressed(32) then exit // press space to exit
     sync()
loop

deletesound(SoundID)

Hope this helps

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DavidAGK

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Posted: 17th Jun 2018 11:07

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OK, cool - thanks.

Makes me think it would be good to have the equivalent sprite commands - where you can spawn a sprite and when it gets to the end of it's animation cycle (or 2..3..4 cycles) it auto-deletes itself.

Using Tier 1 AppGameKit V2
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DavidAGK

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Posted: 17th Jun 2018 17:42

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So here's a question then....

If I fire off a sound instance with looping set to yes... and then fire another off, because I don't have an ID for the first.... I have no way of stopping the first sound from playing until I stop ALL the instances playing that sound by doing StopSound(SoundNumber)

I'm wondering if I get this sound thing!

Using Tier 1 AppGameKit V2
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puzzler2018

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Posted: 17th Jun 2018 18:21 Edited at: 17th Jun 2018 18:23

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Errrm interesting suggesting and one to think about that one

If your right in what your foreseeing then there maybe a horrible way round it

+ Code Snippet

SoundID = loadsound("sound.ogg")


do

     if getrawkeypressed ( 32 ) // space

            if getsoundsplaying ( SoundID ) <> 0 // is playing
                     
                      StopSound ( soundID ) // stop the sound playing 
                      playsound ( SoundID , 100, 1) // restart it
            end if
     endif

      print ("Press Space to fire a bullet ")
     sync()

loop

This is rough an ready and not tested, but my idea is there

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puzzler2018

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Posted: 17th Jun 2018 18:47

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hmmm an interesting idea for something, merge many different music material together - a bit like a DJ disco.

Say -

- load 10 peices of music in an array

- store then length of those peices of each music - 1:45, 1:10, 1:05 etc

- using a timer, when the timer gets to say 10 seconds before the end
- decrease volume 0 of music 1 whilst at the same time start to play music 2 with volume 0 and increase that to 100
- repeat of how many is in the array
- loop back to array 0 and start the music sequence again

Just like they do on the Radio Stations lol they repeat exactly the same songs all day everyday

Errrm - something for later but not for your query but given me a fab idea

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smallg

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Posted: 18th Jun 2018 10:48

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Use the instance ID you are given when calling PlaySound(), you delete the entire sound (from memory using the ID given when calling LoadSound()) but stop and play instances of the sound.

life's one big game
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Phaelax

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Posted: 18th Jun 2018 18:05

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I don't see how or why you'd ever have a sound playing without knowing the ID.

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DavidAGK

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Posted: 25th Jun 2018 17:35

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It was sound instance IDs (that get erased) - but I think I was getting confused by the instance ID and the loaded sound file that is used to generate the sound instances...

Using Tier 1 AppGameKit V2
Started coding with AMOS (Thanks Francois Lionet)

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