A simple but effective white noise sweep up created using a white noise signal, using automation to change a simple filter and colour to the sound to create a sweep effect.
A 2 note sequence i recorded from behringers crave (sequence is programmed on the crave) inot logic. I played with the filter cutoff manually while recording. Just recorded not edited.
Using a frequency filter by setting its oscillations in variable arrays i was able to make most of these sounds. Also vocoding and feedbacks and feed throughs were happening. Then they were altered in audacity.