actually, i just checked and that method i suggested before doesn't work at all. it's the same as the [phasor~ 28000] - [samphold~] effect.
martin, i missed this part of your mail before:
Unless you're looking for aliasing artifacts, wouldn't it be easier to use
a multi-pole low-pass filter at around 14kHz?<<
i just tried that, and i guess what i need must be the aliasing artifacts.