Intergalactic Rhythms with Pulsar from Qu-bit

The kind folks at Qu-bit Electronix have sent along their fun rhythm pattern generator, Pulsar, for examination. You may already know that we are complete fanatics for Euclidean Rhythms here at Voltage Control Lab… Pulsar delivers a playable interface for creating Euclidean rhythms and combining them with programmed gate sequences as well as binary and random patterns.

Pulsar is an extremely powerful tool. It features 4 independent channels of gate pattern sequences, each able to play from 1 to 16 steps backwards or forwards. An additional output carries the internal clock pulses, which can be timed anywhere from 5ms to 16 seconds between steps. Each channel features a built in clock divider and multiplier, or they can be decoupled from the internal clock, allowing for independent tempo control.

Pulsar has 4 main modes, a sequencer (which allows the user to create custom patterns by turning the main encoder, and pushing it to enable or disable the selected step), Euclidean rhythm generator mode (see the video below for an explanation of this technique), a binary number pattern generator (another interesting and unique implementation of binary values, see the Mystic Circuits’ Vert) and a random pattern generator (a great tool for subtle or dramatic pattern manipulation).

The module offers control and CV modulation of sequence mode, clock rate/division/multiplication and pattern length. There is also a gate input to activate burst mode, which allows for patterns to be played as one shots rather than loops (push the length encoder to enable or disable pattern looping). In addition, the absorb function can be gated from an external source, acting as a pattern reset function.

This module is endlessly enjoyable to play with. The pattern combinations are so fun, and features like gravity mode (which causes a pattern to accelerate through the loop like a bouncing ball) offer a different kind of programming flexibility. We’ll be back to examine the global parameters of Pulsar in a future video.

How are you generating interesting and complex gate patterns? Tell us about your techniques in the comments!

Tripping On Acid Curds In Ornament & Crime

This week, we’re examining another mode in the deep and complicated Ornament & Crime, called Acid Curds. While the module contains a few different chord sequence generating tools, Acid Curds is extremely programmable and can give the user a bit more flexibility than the tonnetz based modes.

Acid Curds is a chord progression sequencer, with four different 1 to 8-step chord progressions that can be chained together end to end to create up to 32 step harmonic sequences. Chord quality, voicing, inversion, root key and octave can be programmed or modulated on each step of the sequence. Sequences are quantized to one of dozens of available scale shapes to produce musical results, with the common Ornament & Crime scale masking and base note functionality.

The progressions can be chained in similar fashion to the sequences in Sequins mode. There are a few different ways to chain them together, including having them play back end to end, triggering the toggle action, or using a CV input to shift the sequence position. Individual sequences can be played back in forward motion, reverse, two different pendulum modes, random and Brownian probability over sequence direction change.

The four outputs on the module are typically going to be routed to four separate oscillators 1V/octave inputs. These oscillators should be tuned to the same frequency before patching from Ornament & Crime, so they can be appropriately detuned to fit the selected chord shape. Trigger input 1 acts as a clock as well as a sample and hold trigger to capture and quantize any incoming CV signal at CV 1. Trigger 2 can be used to advance a step in the current chord sequence, while Trigger 3 will advance to the next progression, and Trigger 4 resets the progressions.

Acid Curds also features an extreme CV assignment page, allowing the four CV inputs to be routed to modulate virtually any parameter in the mode. These include sequence length, chord attributes, transposition and many other critical functions. With CV assigned to transpose as well as control inversion, voicing and quality, the module takes on the form of many other chord based modules.

How are you generating chord sequences in your system? Tell us about it in the comments!

Sequins Mode in Ornament & Crime

We’ve looked at a ton of the modes in the amazing polymorphic Ornament & Crime, from quad Turing machines to quad quantizers to quadrature LFOs… Now we return to the module to learn about a newer mode, the dual sequencer called Sequins.

Unlike many of the other modes in the Ornament & Crime, Sequins is not four identical functions in one but rather two complex but identical CV and gate sequencers. The mode incorporates elements of other modes that we’ve examined before, like the pitch quantizing and note masking functionality of Quantermain mode. In fact, the sequencers can quantize to one of the dozens of internal scales, user created scales or disable the pitch correction altogether for microtonal, non-traditional sequences.

Each channel contains up to four different two to 16 step sequences, which can be chained together to play end to end for up to 64 step sequences. This chaining action can be engaged using triggers as well. Sequences can be played using CV address of sequence position, utilizing the CV inputs on the module to send a voltage source in to shift the sequence. The patterns have different playback modes, allowing for forward, reverse or pendulum ping ponging of the sequence, as well as pattern randomization and brownian probability, setting the chance that the sequence direction will reverse with each passing note.

Another important feature of this mode are the assignable C and D outputs, which default to gate sequences for channels A and B respectively. These outputs can be adjusted to output copies of the A and B sequences instead of gates. They can also be repurposed as envelope generators, saving some extra modules and giving the sequence even more flexibility.

You can watch the video for more details, but this latest update to the firmware (version 1.3.3) seems like a major step toward the refinement of the module. Note when you update your firmware, the hex file capacity is at 100%… They are really cramming as much functionality as possible in to this beast.

How are you using Ornament & Crime? Tell us about it in the comments!

0HP Eurorack Modules from Mystic Circuits

Mystic Circuits is known for some far out module design, like their extremely fun gate sequencer, Vert. Now Eli and the Mystic Circuits team have developed a new floating module system in the tradition of external mults, called 0HP. These innovative, business card sized modules dangle from or rest on your eurorack system, performing basic but crucial functions.

0HP “modules” are ingenious. Simple passive circuits (requiring no additional power source) rest at the heart of these open source devices. Available assembled or in DIY kit form, the 0HP line provide important tools that any modular user might need.

We all need more VCAs. Perhaps the most useful device in the line is the VCA/AND Gate, a passive VCA with an additional trigger output. When a signal is patched to the input, AND the CV input recieves a high voltage, the signal is sent to the output. With a gate, we get the AND logic functionality. When an envelope is used instead, we can shape the amplitude of the input signal over time. The circuit might be passive, but it can handle audio rate modulation, applying amplitude modulation to the incoming signal for some deep tonal manipulation.

The OR gate is another handy device, combining two CV or gate signals to a single output. This circuit can be used as a simple mixer with no attenuation, making it useful for many purposes. The module works well as a gate sequence mixer as well, allowing the signals from both input 1 OR input 2 to pass to the output, a fun tool for combining a steady a pattern with a more complex one for fills or embellishments.

Mystic Circuits has just released two more 0HP modules, a vactrol based VCA and a vactrol based low pass gate, offering more options for shaping the character of your patches without the cost in rackable modules.

What external devices are you using with your modular system? Tell us about it in the comments!

Chirping with the Moffenzeef Kriket

Moffenzeef Modular is known for the sometimes odd, quirky approach to Eurorack design, and Kriket is no exception. A strange device at first glance, Kriket is an interesting percussion module, generating anything from cowbells to snares to castanets.

Moffenzeef (who just opened their new online web shop!!!) generally has some fairly complicated modules, but modules that have some clear definition. The GMO operates as a sample or wavetable voice, with start and end point controls for the audio clip (head and tail, as the case may be). Deviant is a dirty random stepped module, fairly straight forward. Kriket, however, might leave you wondering, what is this for?

The module is effectively 4 oscillators running through 4 vcas, summed from to the output. Each voice includes a cv input to control the amp, and a knob to control frequency. A strange arrangement for most modular oscillators, where most might expect cv control of the pitch! However, pitch control comes in the form of the Kriket input at the bottom of the module. When voltage is sent to this input, a vactrol on the back of the module is illuminated, raising the pitch of the 4 oscillators.

Kriket can be gated to open and close the oscillator voices, creating tonal results. However, things start getting interesting when shorter pulse widths are used. Triggering the channels may be the best method to getting tight, popcorn-y percussive sounds. When the Kriket input triggered, these poppy, clicky sounds take on entirely new forms, becoming laser like zaps and snaps. Send in some alternating currents, and the Kriket input starts frequency modulating the pitch, shaping entirely different and complex warbles and hums.

Kriket may be best served with an actual envelope and vca following the mix output, for more shaping options. While this module may seem strange and simple, it begs to be tweaked in any way, shape or form.

How are you getting more complicated percussion sounds in your Eurorack system? Tell us about it in the comments!!