TubeOhm Jeannie - the TubeOhm Synth
you are not only buying a synthesizer but also the experience of building your own musical instrument
NEWS 28.09.23: first tests with Braids oscillator model in Jeannie
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first test Vowel sound from Braids
Be an artist of your sounds
As of now (23.04.23), Ericasynths has metal cases for Jeannie on offer. For the time being, these can only be ordered via Ericasynths.
For more infos click on the pictures.
Our aluminium case kit for the TubeOhm Jeannie synthesizer turns the DIY Jeannie into a proper, studio-grade instrument.
The kit consists of a two-part powder coated and silkscreened aluminium case, a CNC-machined plexiglass LCD cover, 4 screws and 4 anti-slip pads.
TubeOhm - Jeannie (Polyphonic Synth)
Jeannie is an brandnew 8-voice polyphonic DIY synthesizer by TubeOhm. We really took our time to develop it during the past few years and now here is it, currently released in small batches. If it is out of stock, it will come back soon after.
Jeannie features 2 Oscillators, Noise, 2 Envelopes, a Multimode Filter, 10 different Waveshaper, 2 LFOs, Ring Modulator, FM, XOR, OR, and a Step Sequencer. The Oscillators can run independently or synced and feature the impressive amount of 945 different waveforms each! 2048 sounds programs can be stored on the SD Card.
New to the latest firmware is an adjustable Waveshaper per voice. Unlike in many other synths, the Waveshaper is located after the filter, what gives extremely interesting timbres and has its advantages.
The synth contains a digital effect processor with 14 different, adjustable effects.
TubeOhm are constantly improving the firmware at the moment, so you can expect updates and new features during the near future.
This is definitely an extremely interesting DIY project with a high price/performance ratio. Hopefully a little community will grow over time around that nice piece of gear.
To get an impression what Jeannie is capable of, please check out this Amazona article including a video sound demo and also read the detailed manual - it’s worth it!
The TubeOhm website is the resource for some sound demos, building instructions, manuals, firmware updates etc. Please download all that stuff there.
Infos also here :
You additionally need:
• Power supply 12V DC, min. 1A with 5,5/2,1mm center positive
• Micro SD RAM card 8 to 16 GB
Attention , if you build Jeannie you have to use a LCD from Tubeohm. This display is available in all kits.
Other LCD displays will not work properly.
This is a Do-It-Yourself kit, not an assembled module. SMD parts are pre-soldered, rest to solder.
DIY level: medium/advanced.
Building instructions can be downloaded here.
How to build Jeannie :
Here are all files you need to build Jeannie. Manuals are in german and english.
DIY Manual (do it yourselfe) V 1.05 - 08.04.22
Bill of material for the Motherboard , FX Board and Case
User manual: New for firmware V 2.xx
Technical info / schematics
Firmware / sound and seq files
The latest stable firmware for Jeannie , sounds and some helpful tools can be found on the following >firmware< website.
Jeannie on github
Jeannie Forum here :
You can also speak english
Copy and paste it into your browser This is not a direct link.
old Forum on Sequencer.de
new Forum only for jeannie (german/english ) here :
Jeannie - DIY Synthesizer , technical data
Jeannie - DIY Synthesizer FX Board
The FX board is based on a Spinsemi FV-1. At first we wanted to switch off the built-in effects programmes, but some of them are quite usable. We have also programmed 8 new effects.
The audio output
DIY ready build FX board
The FX board
Here you can see the soldered FX board. The effort is limited to the three SMD components.
The board with soldered SMD components can be ordered from TubeOhm.
*** Attention, 16.09.21. Due to the shortage of components, the FV-1s will not be available again until January 2022, according to the European distributor. I have not had good experiences with FV-1s from the spot market. Therefore, the board will be offered without the FV-1 for the time being.
It's like real life, at the beginning of the year there were still hundreds of them, but when you need them there's nothing to be had.
But Jeannie works without the effects for now.
If the FV-1 is available again, mad can simply install the FX board and plug it into the Jeannie - done.
*** A full kit contains also the FV-1.However, we have received only a limited number of the FV-1 ICs .
you see the LCD, encoder, pots and switches.
On the right side at the back the Teeny 4.1 is plugged in. On the right side in front of it is the plug-in digital-analogue converter.
In the middle is the FX board . This is simply plugged onto the motherboard
Thus Jeannie consists of :
Jeannie is based on the Teensy 4.1
DAC output is 16 bit stereo .
The unit can be freely programmed with 4 potentiometers, one encoder and 6 switches. An color 1,8 TFT 160x128 display provides visual feedback and displays all parameters in
And yes, we used 6 SMD components because space was limited.
However, we made sure that the footprint of the SMD components was enlarged so that the components can be soldered easily.
But we will also offer boards where the SMD components are already soldered on.
So, the coolest thing is the easy plug-in DSP board with the FV-1 and an EE-Prom.
EE-Prom . So you can - if you can - also write your own effect programmes.
You can also operate Jeannie without the DSP board at first, i.e. with the sound without effects. Then you buy the board, plug it into the board from below .... Well, your ears will be surprised ......
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Here is the case:
Side parts black and the panel dark blue transparent
The plexiglas case is a new development compared to the Shruthi Case . Due to the structure, plugged and additionally screwed with the spacers of the board, it is much more stable. The additional side panels serve as design elements and tilt the device slightly so that the display is more visible. Special allen screws are used for the optics.
The scope of delivery includes:
I would also like to thank Mr. Schön from Plexilaser.de for the production of the housings.
History , the beginning in 2021
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