Thanks for the tips! That web based synth is cool! I've been toying a bit with a pitch envelope but just not sounding right. I'll try messing with Bfxr see what I come up with. My troubles may be partly due to the synths I'm trying to use - the ones I've messed with so far are either so restrictive they may as well be soundFonts, or they lack elements I need - no pitch control, no white noise etc - some don't even have editable envelopes. If I get more 8 bit projects in the future I'll probably have to explore the commercial chiptune synths that are out there.