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The DU-SEQ Eurorack sequencer from experimental electronic record label Detroit Underground, is a techno beast. With recent successful Eurorack releases like the DIY DU-RDT low frequency shift register and the DU-KRPLS glitched Karplus Strong-focused module released in collaboration with Meng Qi, DU has been carving out a presence in the modular community. Of course, the label also releases incredible music, including work from artists like Richard Devine, Oliver Dodd and Drumcell.

From the DU MDLR site

The 1V/octave pitch signal path is fully analog, and the gate signal is generated entirely from discrete 7400-series logic (no microcontroller) clocked directly from a built-in clock with tempo and gate width settings, or an external clock/gate signal.

The DU-SEQ is an 8 stage CV and Gate sequencer with a 2 octave range per step. While this may seem like limited range, I rarely find myself using a larger range of notes when composing leads or baselines. Each step can be repeated up to 8 times, using the Step Count switches in the row of knobs below the illuminated CV sliders. Each step also includes a dedicated Gate Type switch, which selects between 6 different gate actions.

Screen Shot 2016-09-05 at 12.59.53 PM

The gate types include the basic options we find on most sequencer, no gate and single gate. When these modes are combined with the extra steps in the Step Count section, we can inject longer rests and spaces in our sequences. When we switch to the multiple gates option, each additional step added in the Step Count section receives a gate. When switched to long gates, one gate will hold open for the Step Count length. Of course, you’ll need an envelope with sustain to hear those longer notes.

Things get particularly interesting when using the External Gate functions. Other gate and trigger sources can be routed to control the gating of certain steps. When a faster gate sequence is routed to the External Gate 1 input, any step assigned to that gate type will remain silent unless signals are received at the Ext Gate 1 input. Whatever gates are received, will be played, including clock multiplied rhythms and patterns, until the sequence advances to the next step. This yields some incredibly complex patterns, especially when both External Gate inputs are used.

How are you getting more complex results from your sequencers? Tell us about it in the comments!

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Complex Patterns & Gates w/ DU-SEQ

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