The Kilpatrick format is a new kind of modular synthesizer system
for players that demand something better, different and
inspiring. Designed by Andrew Kilpatrick, the Kilpatrick format
represents a new generation of modular music making by offering the
right combination of look and feel, playability, excellent circuit
design, and the perfect blend of old and new concepts that make the
system easy and fun to use.
Whether you're an experienced synthesist, or looking to get
into synthesizers or modular systems for the first time, the Kilpatrick
system has something to offer you. The clean design is easy to learn,
but also offers experienced users an uncluttered layout that gets
right to making great sounds.
Kilpatrick Format Features:
4U (7") panel height - each panel offers close to 30 in. of
Simple plug and play module installation - rearranging a system
or adding new modules is easy
Universal use of banana cables for patching of audio, CV and
pulse/gate signals - high quality cables are available in a variety
of colours and lengths
Colour-coded jacks indicate different signal functions and
Separate analog and digital grounds used for low noise signal
returns - plenty of power available for digital modules
Total cabinet depth of less than 3" permits table top or rack
High quality brushed anodized panels are rugged and feature
clean, futuristic graphics
All modules and systems are hand-assembled and built-to-order in
our downtown Toronto workshop
Kilpatrick format products are only available directly from Kilpatrick Audio
Modules - the current lineup of Kilpatrick format modules
Combining a compact and capable audio mixer with a MIDI to CV converter the K1 Mixer Interface
acts as the central hub of most systems. The AUX send and stereo inputs provide a perfect effect
loop for use with the K3 Digital Effects module. Both headphones and line outs are provided with
independent volume controls.
A built-in MIDI to CV converter offers many different modes of operation, allowing a MIDI keyboard
or computer to control the system.
A real analog VCO based around a traditional sawtooth core, the K2 Pitch Oscillator generates
multiple basic waveforms simultaneously. The PWM section includes both a standard PWM mode and
a unique multi-pulse mode for making new timbres. The wave blending section allows voltage-controlled
blending between different waveform combinations.
The K3 Digital Effects module offers two independent digital effects processors in a single
module. The REVERB / DELAY section produces high quality stereo reverb and delay effects
processed at 24 bit. The ITTI BITTI section produces lo-fi effects to either audio or control
voltage signals processed at 12 bit. Effects such as digital multiplication, (ring mod) sample
and hold, wave folding and digital distortion are possible.
The K4 Envelope Modulator offers four complete channels of modulation goodness in a single module.
The first two channels generate envelopes in one of three modes, with voltage control over the
up and down times of the envelope. The other two channels generate LFO signals with voltage
controlled speed and a wide range gain control.
The LFOs can be synced together and produce outputs with configurable phase offsets between them.
The K5 Filter Amp is a quad voltage-controlled amplifier (VCA) and low-pass filter (LFP) in a single
module. Manual and voltage control of the output level and filter cutoff frequency are provided on each
channel. Adjustable filter resonance adds extreme peaking around the cutoff frequency for ultra-juicy
bass sounds or pitched percussive sounds.
The K6 Voltage Processor is a workhorse utility module. It has audio buffers to convert
audio signals to and from the outside world. Add to that four mixers each with dual buffered inputs,
gain control, (0-2x gain) normal and inverted outputs and a signal level/polarity LED. It also has
two more mixers each with dual buffered inputs and a normal output plus a level LED and a fixed gain
of 1x. Finally two buffered pot that can make -5V to +5V for creating manual control voltages, plus
a signal switch / swapper which can be either manual or voltage controlled.
Kilpatrick Format Random Sequencer and Analog Noise Source
The K7 Entropy Sequencer takes a unique approach to sequencing. It can be used in programmed mode
where steps you program are played by like a standard step sequencer. But in the normal mode the steps
are generated from a true analog noise source. Capture some randomness and then loop it. Then edit the
steps if you want or seed part of the sequence with new data as the sequencer is playing. Add to that
selectable scales and rhythms and a dedicated random pulse output, and you will never get bored. Plus the
analog noise source can be used to generate white, blue or pink noise with an adjustable output level.
Kilpatrick Format Multi-mode Filter and Envelope Follower
The K9 Dynamic Filter brings a great, clean and precise filter to the Kilpatrick
Format. Like other modules in the system K9 goes above and beyond normal
expectations by offering a wealth of control options such as calibrated V/octave
input for easy key tracking, as well as voltage controlled resonance and a built-in
VCA channel. But K9 also offers a powerful envelope follower
section as well which can track audio signals and make control voltage signals.
The K10 Dual Envelope offers two identical ADSR envelope generators
with a wealth of voltage control possibility. In its simplest form
the K10 provides a typical ADSR envelope generator. But with the
addition of a retrigger input and five real-time voltage controlled
per section, the dynamic possibilities of the module are incredible.
The peak input allows for dynamic control of the output envelope size,
and the shape control provides dramatic control over the shape of the
A, D and R slopes. From a sharp exponential shape to a very rounded
log shape and everything in between.
If you are looking for something unique and specific, please let us
know. If you have a budget, we can work to create unique and special
designs suited to your particular needs. Draw on our years of musical
instrument design and manufacturing experience!
Contact us for availability.
Systems and Pricing
Basic Four Space System
A single row of KFormat makes a great high-quality add-on for PHENOL or other banana systems. You can choose
additional filters, oscillators, effects or utility modules.
Classic Eight Space System
If you want to build an entire system from scratch starting with eight spaces will give you
enough flexibility to have everything you need for a complete synthesizer system. Two rows (eight modules)
can be powered by a single power supply and can be set up for either table-top or rack-mount use. (both sets
of mounting hardware are included)
The standard power supply powers 1x active and 1x passive enclosure. (8 module spaces) The maximum current
available is approx. +15V @ 20W and -15V @ 10W. (max. 24W combined total on both supplies) A third passive
enclosure can be attached as long as the total system power is well within spec.
K1 Mixer Interface - +15V: 1.5W / -15V: 1.2W
K2 Pitch Oscillator - +15V: 0.75W / -15V: 0.75W
K3 Digital Effects - +15V: 0.9W / -15V: 0.3W
K4 Envelope Modulator - +15V: 0.75W / -15V: 0.45W
K5 Filter Amp - +15V: 1.05W / -15V: 1.05W
K6 Voltage Processor - +15V: 1.3W / -15V: 1.3W
K7 Entropy Sequencer - +15V: 1.05W / -15V: 0.45W
K9 Dynamic Filter - +15V: 1.43W / -15V: 0.9W
K10 Dual Envelope - +15V: 0.75W / -15V: 0.38W
Kilpatrick Audio will warrant all parts of the system against
manufacturing defects for a period of one year from the date of
purchase. If you have a problem with a module, contact us and arrange
to return it to us for repair. After one year, we will offer low cost
service on modules for as long as we can get parts. We have the best
service and support in the industry so you can feel comfortable buying
our products. Plus, we're Canadian which means we're friendly and always
willing to help, eh?
Note: This warranty applies to Kilpatrick format
products and takes precedence over our general warranty policies in
the case of any differences.