Doepfer - A-117 Digital Noise / 808 Source
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Product number:
120092
Product description
The A-117 provides two units: a digital noise source with variable clock rate for noise and digital random as well as a nice 808-ish sound source with two or six oscillators for cowbell, hi hat or cymbal sounds
The digital noise generator uses random sequences of square waves (18 step shift register with multiple feedback), whose rate can go from random clicks to noise. The colour of the noise is very different from the analog noise produced by the A-118. The frequency range of the internal clock oscillator is about 100Hz - 100kHz.
In addition to a manual setting, the rate can be controlled by an external clock, also in audio rate.
The 808 Source aims to re-create the sort of multi-oscillator array that was used in Roland's TR-808 and 606 drum machines as the basis of the sound of the hi-hat, cymbals and cowbell. The cowbell mix uses two oscillators, and the cymbals mix six.