Burg is the result of spending a lot of time in the workshop and learning about electronic circuits with the help of shared knowledge. We built this synth mainly for exploring the different but classic building blocks of sound design and making them as interchangeable as possible. It turns out to be a very unique and useful synth to us and hopefully for others as well.

We don't think of this as a mass product and will produce just as many as people are interested in. We want to be as transparent as possible and offer a fair price for everyone regarding the material costs and our working time.

Burg is a great way to start with modular synthesis and plugging in patchcables ;) It provides you with all necessary tools to start your modular journey now. It is a standalone synth voice, complex multi FX processor, controller for external gear or all at once. The perfect companion to any setup, if you already have modular stuff, wanna connect with instruments or other gear. It can work for many different musical approaches and creative processes, it bridges between the analog modular world and external gear. The unique combination of circuits let you customize your desired sound in all analogue ways.

18 individual and characterful modules allow you to explore beautiful and weird interactions. You can easily create dynamic melodies, harmonic drones, weird noises and outer space sound effects. If you plug-in an instrument, a microphone, your favorite tunes or the internal sounds, it is easy to modulate any signal with a crispy filter (wasp-style), a wavefolder, some heavy distortion and a double delay to glitch your mind away. With 55 patching points in total, possible combinations are almost endless. The intuitive touchpad interface gives easy control over multiple CV and gate signals at the same time and is the main modulation source of the Burg system.

Two light dependent controllers guarantee a unique behavior and can be modified easily according to your needs or for experiments. Also other modules can be modified by exchanging components on the back plate, so customizing the frequency range of the oscillators/LFOs or shaping your individual clipping distortion with different types of diodes is possible.

There are two power bus connectors on the backplate so Burg can be used as a power supply for other eurorack modules as well. The internal power supply can be powered with barrel jack from 9V to 18V (center positive) and can work as a power supply for small modular racks using a flying bus cable.

Overview:
18 individual modules
29 outs
26 ins
38 knobs

Features:
2x high impedance input amplifier
- gain control
- can overdrive the input
- buffered second output

2x saw tooth oscillator
- frequency control knob
- v/oct input
- fm input
- fine trim pot on backplate

wavefolder
- cheap octave up effect
- also VCA/Lowpass gate
- can be used as attenuator

wasp-filter
- pinging filter
- distortion possible
- unique fine tune/bandwidth poti

2x voltage controlled amplifier
- attenuator knobs for cv input
- inverted VCA possible

2x low frequency oscillators
- two ranges via switch
- exchangeable frequency range

delay 1 endless
- clipping diodes
- pt2300 glitches
- time cv input
- feedback cv input

delay 2
- regular pt2399 behaviour
- time cv input
- feedback cv input

5 channel active mixer
- individual volume controls

distortion
- exchangeable clipping diodes
- gain control
- distortion control

6 touch plates
- 0–5V touch sensitive
- individual pitch knobs
- main pitch offset
- all gates/pitches out
- 2 dedicated gate outs
- mixed pitches out

2x light sensors
- exchangeable sensors
- smoothing with capacitors
- voltage divider behaviour
- arduino/breadboard power
- connect motors/lights

Circuit bending points on the backplate:
- capacitors on VCOs
- diodes on distortion
- capacitors on LFOs
- transistors on VCAs

All parts on burg that could potentially be damaged due to some strange unfortunate events are replaceable because they are in THT size not super tiny micro electronics.

Burg means in German castle and is the name our friend gave the place, where we designed and assembled this synth, to emphasize the last bastion of free and impregnable soul in the heart of Munich.