Joe -

If I change your quarter notes on the "claps" to sixteenths, and add a dotted eighth rest after each one, I get a little more clappy sound. Adding, perhaps an F to the Bb to broaden the spectrum a little seems to also help.

Still seems like it needs a little "snap" on the beggining. Maybe superimposing a woodblock or something similar.

The "Applause" sound is a sort of "white noise," so if you cut the duration short enough it should sound something like a single clap. I didn't try anything shorter than a two-feather note on it though.

Sometimes you have to "assemble" your own sounds from what's on the device board.

The Korg M1 device is pretty common, and has a "Finger Snap" (#70), and the Roand U-220 has two "Slaps (#30, 31), but you can't be sure the person playing your masterpiece will have (and use) alternate devices - so the applause in General Midi is probably your best bet.

John