CHIPFLIP > Tell us a bit about your different projects. How did you come up with ‘the new waveform’ in Pico? How did you do it and what does it actually do? Will there be new experiments with the waveform editor?
SOUNDEMON > As with Perkele, we needed a very small tune for Pico which is also a 4kb demo. I decided to include some metallic drum sounds by using the “testbit trick”. While trying different parameters for the sounds I got some weird pitched sounds. Only after releasing the demo I spent some time analyzing the behaviour of the SID chip to find out how and why the trick works.
via Interview with SounDemon, the Sound Chip Hacker « CHIPFLIP.