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Hallo friends.. The DIY project is now over. Jeannie can be bought at tubeohm.com. Jeannie is an 8-voice polyphonic open source synthesizer kit with digital sound synthesis and digital filters based on a Teensy 4.1. For sound generation, the user has a variety of classic and band-limited waveforms at his disposal. A pool of 15 waveform banks with 63 different waveforms each offer plenty of space for sound experiments. A waveshaper with different characteristics provides for gentle to vicious sounding distortions. To match the waveforms, there is a digital 12dB multimode filter with fade function from low-pass to high-pass and a band-pass function. A 24-bit DSP effect module with adjustable parameters rounds off the sound synthesis. An integrated polyphonic 16-step sequencer provides for the playfulness of the small synthesizer. A total of 2048 sound patchesfrom 15 banks can be loaded and stored via an integrated SD card. A color 1.8 inch TFT display allows a clear menu structure and easy operation of the synthesizer. The parameters are entered via four rotary knobs below the display and an encoder for selecting the sound programmes and switching to the menu functions. In addition, there are six buttons for operating special synthesizer functions. properties • 8-part polyphonic DIY synthesizer • ARM Cortex-M7 processor 816MHz with 1MByte Ram • two digital oscillators per voice • 15 waveform banks with a total of 945 waveforms • 12 standard waveforms, some band limited • Noise generator (white and pink noise) • Oscillator modulation (XOR, XMOD, MOD, AND, OR, FM) • Waveshaper with different curve shapes • 2 LFOs for pitch and filter modulation with 6 different waveforms • 1 PWM LFO from 0.04Hz - 25Hz • Digital 12dB multimode filter with resonance and fade function (LP / HP / BP) • 2 ADSR generators 0.3ms - 12s with positive and negative control • 24-bit DSP effect module with 15 effects and adjustable parameters • Polyphonic 16 step sequencer • SD cards for loading and saving the sound programs up to 2048 • Colored 1.8 inch display with a resolution of 160x128 pixels • Volume control • Boost function for improved bass reproduction • Stereo audio output jack socket 6.3mm • 4 potentiometers for entering parameters • Rotary encoder for menu control and sound selection • 6 function keys • External power supply 12V DC / 1000mA • and power switch The kit The kit consists of a total of four boards, the Teensy 4.1 board and the PCM5102A Board can be delivered fully assembled and simply plugged into the existing contact strips the back of the panel board. From now on, various kits with different expansion levels will be offered on the tubeohm.com website (see link). Jeannie-1 for experienced solderers Motherboard PCB FX board LCD FX-EEPROM Price € 63.90 EUR Jeannie-2 SMD for solderers who do not trust themselves to solder the SMD components Motherboard PCB, all SMD ICs pre-soldered - SMD regulators pre-soldered FX PCB TL 074 and LM 13700 pre-soldered. Attention the FX board comes without the FV 1. LCD FX-EEPROM Price € 92.90 EUR Jeannie-3 full Mainboard PCB, all SMD pre-soldered - SMD regulators pre-soldered FX PCB SMD TL 074 and LM 13700 and FV-1 pre-soldered LCD FX-EEPROM all the parts you need to build the Jeannie casing Teensy 4.1 with the latest Jeannie firmware and 5V Cut Price € 294.00 EUR Jeannie case blue the case Screws, nuts, on / off switches Price € 43,95 EUR Attention, the power supply unit and SD card are not included in the scope of delivery. You need at least DC 12 V - 1 A for the power supply For the SD card you need 8 or 16 GB micro SD card DIY Manual , Operation Manual Link: https://www.tubeohm.com/jeannie.html Youtube: https://youtu.be/PEdhWX7O_pU DIY blog german: https://www.sequencer.de/synthesizer/threads/avr-synthesizer-wave-1-de-generator.87599/ DIY blog english: https://forum.pjrc.com/threads/63255-New-Teensy-Synth-quot-Shruthi-2-quot?highlight=Teensy+Shruthi facebook group Greetings from germany. Rolf