External memory (just because)

I have a monster load of 30 pin memory sims laying around. Im trying to figure out how one could be wired up to my arduino? I was thinking it would be fun to modify the code here http://interface.khm.de/index.php/labor/experimente/arduino-realtime-audio-processing/ to have more memory then you could do some sweet DJing effects. Loop long clips stuttering. Another idea I have is to adapt this to turn the audio on tv commercials into gibberish :) sample 0.5 to 1 second of audio and stretch it out to the next syllable would be great on radios too so you don't become brainwashed

any ideas?

If they are computer (dynamic) RAM, they’ll need constant refreshing at some high MHz rate - out of the realm of the simple Arduino!

You'll need to use static RAM for this, because of the refresh problem mentioned above. Look for old 486-era motherboards, which have cache memory chips on them. Or, try to find 6264 or 62256 memory chips (8k bytes and 32k bytes respectively).

many of these sims are from mac plus, se computers IF i remember right these ran at 8mhz? looking around at some of the chip specs found this one http://pdf1.alldatasheet.com/datasheet-pdf/view/37282/SAMSUNG/KM44C1000D.html

Yes, that's the sort of chip used in a 30-pin SIMM. But it's a Dynamic RAM and will require refresh, which makes the circuit much more complicated. Use a Static RAM, and you won't need refresh at all.