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Home > Keyboards & MIDI > Synthesizers > Eurorack Modules > Doepfer A-151 Quad Sequential Switch
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The Doepfer A-151 is a Quad Sequential Switch. Module A-151 (Quad Sequential Switch) is like an electronic four-position rotary switch. It includes trigger and reset inputs, four in / outputs, and a common out / input. Each time a pulse is received at the trigger input socket, the common out / input is connected to the next in/output. After the fourth in/output, the next trigger makes it step back to the first again, and so on. A positive pulse at the reset input switches the out / input immediately back to the first in/output. Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module. Four LEDs indicate the active in/output (ie. the one that is connected to the out / input at any particular time). From spring 2005 a revised version of the module is available. With an additional switch the number of steps can be set to 2, 3 or 4 (thanks to Peter Grenader for this idea). Moreover the revised module allows to process voltages in the full A-100 voltage range (i.e. -12V...+12V). The limitation to -8V...+8V is no longer valid. While stocks last the user can choose between version 1 and 2. Version 1 will be no longer manufactured in the future.
The main features of the Doepfer A-151 include:
This page first created on: 10/09/2014
A-151 Quad Sequential Switch related links:
A workhorse 4 way switch, an essential in any Eurorack setup. Plug in a trigger and the switch walks along a 2, 3 or 4 step path, sending your signal around your rack as you please. An elegant way to create long, evolving patterns and ultimately more interesting music.
Does exactly what it says on the tin. No bells and whistles, but at this price that's fine. Nuff said!
Excellent value for money. Does what is says. Can't think of twelve more words. Or even six. But maybe three.
A nice simple sequential switch that does the job. Excellent
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