[AS2] Sound remove from background

[Digg00]

Sorry for stupid question.

I have a movieclip that you press "B" on keyboard the 1st time it stops the Audio 1 and plays the Audio 2, you press "B" on keyboard the 2nd time it stops the Audio 2 and plays the Audio 1, you press "B" the 3rd time it stops the Audio 1 and plays the Audio 2, etcetc. Like swapping. It works well.

However, I'm using the command

stopAllSounds();

to stop the Audio 1 or 2, but facing one annoying problem: the "stopped" Audios still "exist" on background muted and thus the more "stopped" Audios there goes the more laggy it gets as they exist there on background.

It is a huge problem as when there's lots of other things you do on the game and you press the B for like 100 times, you can't do like anything anymore because there's the 100 muted sound clips on the background.

Demonstrated .swf with random sounds: puu.sh/OUdc

So my question is, how to "remove" the stopped audios from background from lagging the whole swf? "delete mysound" works only if you want to play it once.