Whole-grain sequencing

Start with basic step sequencing. 4 channels out, up to 64 steps each. Internal or external clock. Adjust delay and gate timing, ratcheting, and more.

Next, recall that trigs are envelopes, and so can you: add parameters for set and release voltages, with slew and (time independent) curve, and start generating your expressions and envelopes directly from your sequencer.

Why?

Because per-step parameter sequencing, is why. Easily select steps by hand, in intervals, or by euclidean patterns and raise the set voltage to add accents. Now grab the whole channel and slowly push the release slew to open it all up.

Now why not take one of the 2 CV inputs (4 if you don’t use the external clock inputs) and map them to any of these parameters? Per-step. Don’t forget to use the built-in sample & hold CV source.

Twist it all up with flow control parameters: jump and stride your way into patches that resemble landscapes, programs, or wavetables than anything called a sequence.

Round it all out with 32 save slots, undo & redo, tap tempo, enough settings to completely rethink everything again, and a back-of-unit chaining system that synchronizes clock and scene information.

That’s 2step.

Specs§

Width: 8hp
Depth: 18mm
Power (+12V): 130mA
Power (-12V): 21mA

4 Output Channels: 16bit @ 48Khz thru 100k impedance
4 CV Inputs: 10bit @ 14Khz thru 1k in-the-loop impedance
CV Range: -8V to +8V
Sequence Length: 64 steps maximum
Undo Buffer: 64 entries

Quick Reference§

Easily access reference information at any time by visiting 2step.help.

2step features 16 parameters for adjusting timing, shape, ratchets, and flow:

Manual§

(prerelease manual)

Firmware§

Version 0.232 available here. Update instructions are included in the download.

Open Source§

2step is open source, licensed under the Creative Commons cc-by-sa license.

Schematic (.pdf)
Firmware (github)

With its flexible layout, beautiful bi-color LEDs, quality components including a 16-bit DAC, and many other hardware features, 2step is a ready-made platform for building your own ideas. Powered by an RP2354 with a solderable JTAG debug header and software already provided for all input and output handling, 2step is a true hacker's dream.

See Also§

The Wavestep is 2step's upcoming big brother, with 8 inputs and outputs in 18hp and an expanded user interface laying everything out that's compressed together in 2step.