Scratch

Do you mean that if an action happens for 2 exactly seconds, you'd like a certain sound, which may be, say, 5 seconds, to play for only 2 seconds? If you mean something else, can you clarify?

Serge,
I looked into it and you're right, there is no way to do this without stopping all sounds. There is a few workarounds, though I'm not sure if you'll like them.

1) For cases when you want a 5 second sound to last 2 seconds:
Edit the 5 second sound in a sound editor such as "Audacity" and clip it to be only 2 seconds long. Then import into Scratch.

2) For cases when you want a sound to last any number of seconds which varies depending on the situation, and you don't know before starting the sound how long it should last:
Make the sound very short, like 0.1 seconds long. Then repeat this sound over and over again until the time you wanted it to last is up. This could look something like Forever{If[thingNotDone=1]playSoundAgain,Else break}

3) For all cases when you know how long you want the sound to play immediately before you will start the sound, but don't know how long way ahead of time, and you  don't mind using the built in midi sounds:
Use the "play note for ____ secs" or "play drum for _____ secs" and put the number of seconds you want it to play in the blank.

Hi Serge,

Scratch can import MP3 files because many people have sounds stored in MP3 format. However, when an MP3 file is imported into a Scratch project, the 1.0 version of Scratch uses a method of sound compression that leaves the Scratch project larger than the original project + size of the imported MP3 (as some people might expect). Future versions of Scratch will feature more sound compression.

A volume control for scratch is a must, but I think that you need separate loudness controls for each drum, note, and play_sound, as they have wildly varying volumes, depending on drum type, instrument, or how the sound clip was recorded.
It would be best to add a "loudness" parameter to each of the "play" blocks.

serge wrote:

Hello John,

SCRATCH is a fantastic tool !!

So, I want to synchronize the sounds with the action, it means that we need a block STOP THAT SOUND (with the name of the sound).
I know that we have STOP ALL,but it stops all the sounds of the project !!

What do you think about that ??

Thank you.

Woah, this is weird (sorry for the necropost) but my suggestion is this!! And i posted it before i saw this!

I support.