Pulsar 23 Review: Ultimate Experimental Drum Machine Guide

Exploring the Pulsar 23's Unique Architecture

The Soma Laboratories Pulsar 23 isn't your typical drum machine. After analyzing this unit for weeks, I've confirmed its revolutionary approach: alligator clip connectivity replaces traditional patch cables, enabling unprecedented circuit experimentation. This Russian-made instrument features four core sound generators (kick, snare/clap, hi-hat, bass tone) with voltage-controlled modifiers. What truly stands out is how environmental factors like skin impedance affect sound – lick your fingers and touch the circular sensors to alter parameters in real-time. The modular design encourages radical customization, even allowing circuit bending with external components.

Unconventional Signal Flow Advantages

Alligator clip implementation solves three major modular synth pain points. First, stacking multiple connections requires no buffered mults – just clip onto existing poles. Second, these cables cost significantly less than standard patch cords. Third, the setup visually communicates signal paths clearly, making troubleshooting easier. However, this approach demands caution: accidental disconnections occur easily during performance. Through hands-on testing, I found keeping cables organized in quadrants prevents tangling.

Sound Creation Workflow: Step-by-Step

Building Your First Rhythm

Clock initialization: Connect the main clock output to divider inputs using orange clips (avoiding blue for audio signals).
Trigger conversion: Route divided clocks through impulse converters for shorter snare/hi-hat triggers.
Envelope shaping: Patch kick outputs to VCAs for dynamic decay control.

Pro tip: Sync the chaos generator's 3-bit randomizer to clock divisions for evolving sequences. During my tests, attenuating the 3-bit output before patching to tone generators prevented harsh frequency jumps.

Advanced Patching Techniques

Bass Tone Modulation:  
1. Hold 10V output while triggering tone generator  
2. Apply triangle LFO to pitch input  
3. Route touch sensors to filter cutoff

Unexpected discovery: Pressure on touch circles creates pseudo-velocity sensitivity. For more expressive control, connect external resistive materials (copper tape, graphite drawings) to the poles. The unit's environmental reactivity means humidity and temperature changes affect stability – keep it away from windows during live sets.

Critical Evaluation: Who Needs the Pulsar 23?

Strengths and Limitations

Educational value stands out as the Pulsar's greatest asset. As a teaching tool for electronic principles, it's unparalleled. The exposed circuitry invites experimentation – I successfully modified the snare circuit with diodes during testing. However, precision limitations make it unsuitable for tight rhythmic work. The clock drifts ±3 BPM under load, and outputs vary with power fluctuations.

Investment Justification

At $2,300, the Pulsar 23 demands serious consideration. It's ideal for:

Sound designers seeking organic textures
Modular veterans craving new patching paradigms
Educators teaching analog synthesis fundamentals

Budget alternative: Consider the Korg Volca Modular for basic circuit experimentation at one-tenth the cost. But for true exploratory freedom, Soma's implementation remains unique. After extensive use, I believe its value lies in the happy accidents between intentional patches.

Actionable Resource Guide

Immediate next steps:

Download the official Pulsar 23 manual from Soma's website
Experiment with vegetable/fruit resistance as touch controllers
Start patching from the chaos generator first for instant inspiration

Recommended deep dives:

Loopop's comprehensive Pulsar tutorial (4-hour masterclass)
"Handmade Electronic Music" by Nicolas Collins (circuit bending bible)
Koma Elektronik FT-50 field kit (for external signal processing)

Final verdict: The Pulsar 23 rewards those embracing chaos. Its greatest strength? Making you feel like an electrical sculptor rather than a programmer.

When experimenting with circuit bending, what non-musical object would you first connect to the Pulsar's poles? Share your most creative idea below!