You're gonna have to learn to deconstruct these things by ear if you wanna call yourself a synth wizard, otherwise you're gonna find yourself standing on stage with your proverbial pants down someday, or otherwise recognized as a pretender. Got it?
Now, any time you're trying to emulate a sound, you can start by asking the following:
1)What sort of tone is it? (generally: buzzy = saw, hollow/computery = square/pulse, hum = triangle)
2)What's the filter doing? You NEED to know what the effects of different types of resonant filters sound like, and it's not really easy to explain, so I won't. It's 2 knobs, just play with them.
3)What changes occur over time?
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1) I'd say the Pacman sound is probably a square wave, based on fuzzy memory.
2) Can't really say based on memory, but see below...
3a) This is the complex part. There's an LFO for sure, otherwise it wouldn't be a repetitive, distinctive WAKA-WAKA cycle. What shape LFO? Well, when I pronounce the syllables, it seems to somehow slope ("wah") then hit an abrupt part ("kah"). Can you think of 1 of the shapes that has a slope that resets abruptly? You SAW it mentioned above, hehe... What parameter is this LFO controlling? A Wah Pedal is a band-pass filter...that may or may not come in handy, I honestly don't know, but I imagine it totally will.
3b) The pitch seems to go up and down with each syllable if I remember right. A Square wave synched to 1/4 notes controlling pitch might be handy...
With other synth tones there's usually many other things to consider, but the Pac-Man sound is a good primer because it's probably just the 3 big ones above. Let us know how it comes along. Keep in mind this is just me mentally working out the sound without synth access right now.
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