Make sound cut itself off rather than play over itself
<p>My 1st app is an audio sampler. A button starts an audio loop and other buttons play different sounds over the top.</p>

<p>If I hit a button multiple times, the sound will play over itself.
I want the last click to cut off any audio still playing from the same button. But I don't want it to interfere with any audio started from a different button.</p>

<p>(For a button that plays audio of someone rapping "my name is", 3 quick clicks of the same button should result in "my-my-my name is". But a loop should remain playing in the background).</p>

<p>I'm using SoundPool and OnTouchListeners.</p>

<p>Thanks.</p>
