INTRODUCTION
Consider each of the following three ideas: You want to create a sound whose fundamental character suddenly changes while you play it: not just in the sense of changing the modulation or the speed and depth of the envelopes, but by assuming a completely different timbre from that which went before. &127; You want to create a sound whose modulations change radically and unexpectedly as it develops, cycling between a number of complex modulating waveforms. &127; You want to choose between different sequences of notes - maybe to extend a melody, or to provide a variety of harmonic backgrounds. These are very different concepts, but they share a fundamental property: each requires that something in the sound creation structure (the "patch") changes instantaneously and radically. Of course, modular synths give you a wide range of modulators and envelopes, but this is something different. It requires a device that allows you to take the outputs from a number of sources within the synthesiser, and route just a single desired signal (whether a CV or audio) to the next module in the chain. This device is called a Sequential Switch. Armed with such a switch you can achieve each of the effects described above. &127; If the inputs to the Sequential Switch are the raw sounds generated by a variety of oscillators, the switch allows you to cycle between waveforms. (This is the concept from which wavetable synthesis was derived.) &127; If the inputs are a selection of modulating CVs, you can use the switch to select the desired modulator, applying each to the main signal for as long as desired. &127; If the inputs are the pitch CVs generated by a number of rows in an analogue sequencer, you can use the switch to jump between patterns. There are, of course, many other uses for a Sequential Switch, and it can be one of the most creative modules within an analogue synthesiser. IN USE INPUT 1, 2, 3 & 4 Each input will accept any signal produced by the RS Integrator. These signals may be CVs or audio, and will lie in the range ±10V. If external signals are applied to the RS150's inputs they should also lie within these ranges. STOP / RUN / STEP &127;STOP &127; RUN &127; STEP RESET 2 / 4 / 3 2 4 Once step 4 has been reached, the next STEP or clock/trigger will return the Switch to step 1. The input selection cycle is, therefore: 1-2-3-4-1-2-3-4-1-2-3-4 etc. 3 CLOCK IN RESET OUT INPUT LEDs Note: The RS150 is not bi-directional. You can not use it to direct a single input to one of four outputs. |
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