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A tribute to analog synthesizers of the 70's and 80's. Analog sounds with real knobs for editing but a digital dsp heart.
Jan Ostman
Email Verified
1 Team Member

The dsp-G1/dsp-Gplug chip kit

You can now buy a kit to build the dsp-G1/dsp-Gplug for your self.
The kit is only 5 components and makes the complete dsp-G1 MIDI engine.

It's so easy to build that any beginner can handle it.
Buy 8 or 16 of them and make it multitimbral.

Buy the dsp-G1 chip

And thanks to Blaine Perkins it has it's own MIDI patch editor.

Thanks for your funding!

All you have made the dsp-G series synth a reality.

I'm currently working on the build and delivery of the claimed synth's
I have also bought a domain http://www.dspsynth.eu where I will keep taking orders and selling the synth.

I have also been drawing on the dsp-W series, A sample player in a MIDI-plug.
It will be able to upload samples to it's 2Mbyte or 32Mbyte flash memory and play those back at 8-voice polyphonic with a 24db LPF.

So it's both synth and storage in a plug.

The dsp-W1 will also be here on Indiegogo later this summer.

It's actually up now at  http://igg.me/at/dsp-w1

Thanks everyone!

What Is The dsp-G1?

I'm an embedded developer and programmer since many years.

I also have another passion in life, Music and preferably synthesizers.
And I like building them.

Building analog synthesizers is beyond the reach for most people because of the great in depth knowledge needed in the design of analog electronic circuits. 

There is a way to achive the same analog sound using dsp technology.
The great sounds from Roland, Sequential Circuits, Oberheim and Moog can once again live in the form of Analog Modeling on microcontrollers and dsp-chips.

So I have written the analog algorithms to recreate the sound of the past.

The dsp-G1 is a computer model of an analog synthesizer running with a sample resolution of 44.1KHz and 16-bit. It reads the parameters from the frontpanel knobs and calculates the sound output. It is played through a MIDI-IN connection.

It features a 3-DCO variable waveform oscillator, 18dB Lowpass filter with resonance, 2 Envelopes and 1 LFO. That adds up to 17 frontpanel realtime knobs.

The waveform can be seamlessly morphed from Sine, Triangle, Pulse to Saw.
There is also a Wrap setting for additional harmonics.

The 18dB resonant lowpass filter sounds very realistic and selfoscillates at high resonance settings.

It's 5-Note paraphonic meaning that it can take 5-key chords but they are all routed through single filter and amp envelopes.

All internal calculations are done at 32-bit integer resolution and output at 16-bits.

The dsp-G1 is a standalone synthesizer and requires no computer to play.
Just MIDI input from a keyboard or sequencer.

What does it sound like?

What We Need, What's In It For You?

For the microcontroller to be a musical instrument for anyone to play it needs to be boxed with knobs and buttons for the parameters.

High quality knobs and pots are expensive and so is a nice looking box.
By making a first run of 100 synthesizers, the price can be brought down.

This is where your contribution is of help. 

  • The $5000 funding goal if reached will go to the manufacturing of 100 synths.
  • For a $200 pledge you will recive the complete synth ready to play.
    For a smaller contribution that amount will be deducted from the $200 price.
  • If the funding goal is not reached a smaller run will still be manufactured but the retail price will be higher.

If this is successful an expander module will be marketed that is capable of hosting and playing patches from the dsp-G1 but without editing.

Benefits over other VA synths?

What makes the dsp-G1 better than existing VA's?

  • Power vs. price. It packs alot of sound for the money.
  • User interface. It has a knob for every function. No fiddeling in menus.
  • All knobs send and recive MIDI-CC making it possible to record changes or use it as a control surface.
  • The soul. It is specifically designed to sound analog and good too.

And now there is the dsp-Gx

A performance oriented sketchbook synth.

It has the same great sounding dsp-G1 engine but with less knobs.

It features a color-TFT display for step sequencing and editing.
An analog modeling sketchbook.

The best of all is the price.
If you order one of the first 50 made its yours for $120.

The dsp-Grack

A dsp-G1 in 19" rackformat.

12 knobs and a 320x240 color TFT display.

Stereo output and onboard FX-processor for delay, reverb etc.

The heart of the Grack is the Open Source Arduino Due 84MHz ARM Cortex M3.
That makes it possible to rewrite the synth-OS by anyone using free tools.

Will also be ready for delivery on the 1st of September.

The dsp-Gplug

Its a 5-pin DIN plug with a 3.5mm stereo jack on the other end that you stick into the MIDI-out jack on a master keyboard or a MIDI-interface.

It gives you an Analog Modeling synthesizer built into the plug itself.
It requires no power as it draws it from the MIDI port.

Just MIDI-in and audio out for a dsp-synth.

It uses the same NXP dsp-chip as the other synths for 44.1KHz 16-bit analog synth sound. It is the same dsp-G1 synth but without the knobs.

The synth parameters are sent as MIDI-CC so it will work at its best using a master keyboard with knobs.

raised in 2 months
39% funded
No time left
$5,000 USD goal
Flexible Funding This campaign has ended and will receive all funds raised.
Campaign Closed
This campaign ended on June 21, 2014
Select a Perk
  • $3USD

    $3 for some coffee. Keeps me awake during those long nights of development. A nice way to encourage me to continue.

    1 claimed
  • $10USD
    Support the dsp-G1

    An amount of $10 supports the developement of the dsp-G1. The $10 will be applied if you order a synth.

    0 claimed
    Estimated delivery: September 2014
  • $20USD
    The NXP dsp-Engine chip

    The 8-pin DIP chip is preprogrammed with the dsp_G1 Engine and can be controlled over TTL-serial 115Kbaud. 44.1KHz 16-bit audio output. Solder it to an Arduino Project shield and you have an instant analog modeling synth controlled from you Arduino. 3.3v Power requirement. Arduino library included. $20 includes international shipping.

    2 out of 50 claimed
    Estimated delivery: August 2014
  • $50USD
    Preorder the dsp-G1

    An amount of $50 lets you preorder one of the first 100 synths manufactured. The $50 is deducted from the retail price when you order your synth. If orders are more than the first 100 run, you will still recieve one when more are manufactured.

    3 claimed
    Estimated delivery: September 2014
  • $120USD
    Order the dsp-Gx

    $120 buys one of the first 50 units & includes international shipping.

    2 out of 5 claimed
    Estimated delivery: October 2014
  • $200USD
    Order a dsp-G1

    $200 buys one of the first 100 units & includes international shipping.

    3 out of 5 claimed
    Estimated delivery: October 2014
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