Hi-Hats Concept

The hi-hats sounds are based on 'true' white noise coming from a transistor based noise source - a little tip about transistor based noise source: use PNP transistors as a noise source (i use standard 2N3906 types) instead of the normally used NPN transistors, i compared the noise level of some 2N3904 (NPN) and 2N3906's and found out that the noise level fluctuates a lot for the 2N3904 but for the 2N3906 the average noise level is much higher and it fluctuates less - the noise is then fed through a decay-only controlled VCA. The envelope has two decay times, one for the 'closed' case and one for the 'open' one. For each triggering the envelope is restarted. The noise is then filtered with a 12dB high-pass filter. Thats it!