AJH Synth Official: Vintage Analogue Mojo Meets Modern Modular in a Four-Voice Eurorack Session

At the heart of the patch are multiple Transistor Core VCOs, providing the raw sonic material for everything from classic bass lines to shimmering drones. These oscillators are routed through a selection of filters: the Transistor Ladder Filter for that unmistakable Moog-style bass, the Sonic XV Diode Ladder Filter for more aggressive textures, and the Fixed Filter Bank 914 for spectral shaping. The Wave Swarm adds further movement and harmonic complexity, especially when paired with dual VCOs for the pitched drone voice.

But it’s not just about static timbres—performance tools like the Chance Delay bring a layer of unpredictability. By introducing step probability into the melodic sequence, the patch gains a living, breathing quality. The Ring SM is used to generate sub-octaves and sub-bass, thickening the melodic voice before it’s sent through the Sonic XV. This combination of sound generation and controlled randomness is a hallmark of AJH’s approach, turning a simple sequence into something far more dynamic.

Modulation is where this patch truly comes alive. The Entropic Doom noise oscillator provides percussion, but its character is constantly shifting thanks to random stepped voltages generated by the Tap Tempo VC-LFO. This LFO doesn’t just modulate filter cutoff; it also acts as a clock multiplier, driving both the percussion and, later, the melodic sequence. The result is a rhythmic structure that feels organic and unpredictable, with evolving textures that never quite repeat.

The use of random voltages and tempo-synced modulation is a testament to the flexibility of the AJH system. By patching modulation sources into multiple destinations, the performer creates a web of interdependent changes—filters open and close, rhythms stutter and shift, and the overall soundscape morphs in real time. This is modular synthesis at its most playful and exploratory, where every tweak can send the patch in a new direction.