7 Specifications
7.4 Physical
Specifications describe hardware revision 1.4 and may change without notice. The instrument on this page is a faithful model of the same signal path, rendered in your browser; it is not a recording.
00
PANEL
POWER · KEYS · MONITOR
84 HP
Patchbay Instruments · Model PB-1 · Rev 1.4
PATCHBAY
A desktop synthesiser small enough for a shelf, built by two people in a workshop in Bristol. This page is its front panel: the same oscillators, filter, envelope and delay, running in your browser. Switch it on and play it before you order one.
Play with the mouse, or with your keyboard — A S D F G H J K L ; are the white keys, W E T Y U O P the black. Z / X shift the octave.
POWER
12 V ⎓ 1 A
DISPLAY
PATCHBAY PB-1
OSCVCFENVDLYOUT
POWER OFF
MONITOR · 10 ms/div
KEYBOARD · C3 – E4 · 17 KEYS
Follow the cable down the rack. Each module joins the sound as the signal reaches it.
01
OSC
2 VCO + SUB · LFO 22 HPTwo oscillators, one sub. OSC B sits a few cents off OSC A and the pair beats, slowly, the way a real pair drifts with the temperature of the room. The sub is a square wave an octave down: weight, not detail.
The LFO lives here too. Drag from its OUT socket into any CV socket on the rack.
WAVE · one cycle
WAVEFORM
OCTAVE
DETUNE
SUB
LFO · TRIANGLE
RATE
02
VCF
24 dB LADDER 18 HP
RESPONSE · 20 Hz – 20 kHz · measured from the filter
A 24 dB low-pass ladder in the classic shape: a cutoff you sweep and a resonance that whistles at the edge. Switch to band- or high-pass for the thinner sounds. The curve is measured from the filter itself, not drawn.
MODE
CUTOFF
RESONANCE
CV AMT
03
ENV
ADSR · EXP 16 HP
GATE
Attack, decay, sustain, release. The envelope is what makes a note a note: a percussive click at two milliseconds, a bowed swell at two seconds. GATE lights while a key is down; the shape below is the one your voices follow.
SHAPE · 1 s/div
ATTACK
DECAY
SUSTAIN
RELEASE
04
DLY
BUCKET BRIGADE 16 HPA bucket-brigade delay: every repeat passes through a low-pass, so the tails get darker, not just quieter. The lamps chase at the delay time. Patch the LFO into TIME for tape wobble.
TAPS
TIME
FEEDBACK
TONE
MIX
05
OUT
VCA · METER · MONITOR 20 HP
CLIP
MONITOR · WAVEFORM
The last stage. A clean VCA, a twelve-lamp meter and a monitor you can switch between the waveform and the spectrum. What you hear on this page is exactly this graph: no samples, no recordings.
LEVEL
MONITOR
MASTER
—
DOC
OWNER'S MANUAL · SECTION 7
84 HP
06
PATCH
MEMORY · ORDER 84 HP
MEM
Every knob on this page is a line in a file. WRITE saves what you have made as a PB-1 patch; the same file loads into the hardware over USB. ORDER opens an enquiry with your patch in the subject line, so we build your unit with your sound already in slot 1.
PATCH MEMORY · SLOT 01
NAME
SAVE PATCH TO DISK
ORDERenquiry
£ 649 · MADE TO ORDER · 6 WEEKS
PLAY IT ONCE MORE
PATCHBAY INSTRUMENTS
MODEL PB-1 REV 1.4 S/N assigned at order
PATCH ID — PWR 12 V ⎓ 1 A ASSEMBLED BRISTOL, UK
Sound: Web Audio API, synthesised live, no samples. Type: Barlow, Share Tech Mono, Archivo Black (SIL OFL). Page built with Plate, 2026. Signal ends here.
LINE OUT