rolfdegen Posted February 18, 2021 Report Posted February 18, 2021 (edited) Hello friends. I am Rolf and I would like to share my latest DIY project "Jeannie" with you. It is an 8 voices polyphonic synthesizer based on a Teensy 4.1 board. I started doing it last summer. Now I have built an effects circuit for the synthesizer. "Jeannie" DIY Synthesizer Effect circuit Video The Fx menu in the synth is almost ready. The new one is still missing Display of the parameter values after a program change. There are more videos on my youtube channel: https://www.youtube.com/channel/UCXQSpP0qn5MXSkyDo6PZ4Cw Greetings from germany. Rolf Edited February 18, 2021 by rolfdegen 1 1 Quote
rolfdegen Posted February 18, 2021 Author Report Posted February 18, 2021 Thanks The Synthcore is from TSynth https://electrotechnique.cc/ I have change the hardware und and other user interface and added an Effect processor (Spin FV-1). Quote
rolfdegen Posted February 18, 2021 Author Report Posted February 18, 2021 Hardware subject to change Greetings Rolf Quote
rolfdegen Posted February 21, 2021 Author Report Posted February 21, 2021 Hello and have a nice Sunday There are a few changes in the circuit diagram. The DAC output (PT8211) on the Teensy Board has an active 32KHz LowPass filter. This reduces high-frequency interference signals at the input of the effect chip.The OTA (IC5a / b) for the volume control of the effect signal (MIX) has now been moved to the output of the effect chip. This means that the noise floor at the synthesizer output is a little lower at low effect levels.Greetings Rolf Quote
rolfdegen Posted February 23, 2021 Author Report Posted February 23, 2021 Hello friends..We have started to route the boards. I'm curious how big they will be.Fx board Greetings. Rolf Quote
rolfdegen Posted February 26, 2021 Author Report Posted February 26, 2021 Hello Friends.. Our progress cannot be stopped. This time we really accelerate. The Fx PCB is ready. Now we has started to route the "Jeannie" mainboard. I'm curious.. Fx board Mainboard This is the first draft of the "Jeannie" mainboard. There will still be some changes such as the Teensy processor module (left). This is moved further down so that the USB socket can be used from the outside. Greetings Rolf 1 Quote
rolfdegen Posted March 7, 2021 Author Report Posted March 7, 2021 (edited) The 1st draft in 3D The board is roughly the size of a laboratory card in euro format (160 x 100). The Fx module is simply plugged onto the back. The current prototype Greetings from germany. Rolf Edited March 7, 2021 by rolfdegen 2 Quote
dwestbury Posted March 9, 2021 Report Posted March 9, 2021 Hi @rolfdegen. Thanks for sharing. Overall this project looks good and sounds cool! The Teensy v4 is clearly a capable MCU with it's fast ARM Cortex-M7. I'd be curious to hear about what motivated you to get started with this project and to build off of the Electrotechnique TSynth v4 foundation (http://electrotechnique.cc/)? You also chose to use a minimal control surface, so I'm guessing you're envisioning more of a sequenced, MIDI CC message type of interaction, rather than a live, interactive performance? Cheers 1 Quote
rolfdegen Posted November 19, 2021 Author Report Posted November 19, 2021 (edited) 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 Edited November 19, 2021 by rolfdegen 1 Quote
rolfdegen Posted December 18, 2021 Author Report Posted December 18, 2021 Liitle Footshooting with Jeannie.. Quote
rolfdegen Posted December 18, 2021 Author Report Posted December 18, 2021 Jeannie & Volca in Love Link: https://www.tubeohm.com/ 1 Quote
rolfdegen Posted February 18, 2022 Author Report Posted February 18, 2022 Jeannie Talk mit Rolf, Andre, Mick vom Sequencer Forum und Dean FreudYouTube: https://youtu.be/z1ktgjzEsYkState Variable Filter & Ladder Filter Sound DemoYouTube: https://youtu.be/TWzHH8oTYs8 Quote
rolfdegen Posted April 6, 2022 Author Report Posted April 6, 2022 (edited) Hallo Friends Its new Video from Jeannie :) Edited April 6, 2022 by rolfdegen Quote
rolfdegen Posted April 6, 2022 Author Report Posted April 6, 2022 The current schematic of a voice from Jeannie Quote
rolfdegen Posted May 6, 2022 Author Report Posted May 6, 2022 (edited) Small update.. Soon there will be SysEx DUMP for Jeannie. Then nothing stands in the way of the patch exchange. The transmission path is selected with DESTINATION, eg Midi or USBDUMP TYPE selects a patch, bank, or allWith DUMP-Bank the bankWith source the patchWith SYSEX-DUMP transmission to the PC or receptionTransmission or reception is then initialized via the load/save button Sending and receiving from SysEx already works. But I still have to do some programming Never ending programming. Greetings, Rolf :) Edited May 6, 2022 by rolfdegen Quote
rolfdegen Posted May 26, 2022 Author Report Posted May 26, 2022 SysEx Dump works now. See short video.It was a bit more complicated than I thought. First, conversion routines had to be developed for all 212 parameter values in the Jeannie, which convert 8/16-bit integer values and 32-bit floating-point values into a 7-bit format for the SysEx dump. The same had to be converted back again.This was followed by functions for the transmission and reception of SysEx data. Last but not least, a simple menu for operation had to be developed. The transmission path is selected with Destination (Midi or USB)DUMP type is either a patch or a bank.DUMP-Bank sets the bank (A-P) for transmission or reception.Source is either the patch no. or when receiving the space in the selected patch bank.SYSEX-DUMP is set to send or receive SysEX data.The "Load/Save" button starts transmission or reception.A progress bar shows the progress of the transfer. Greetings from germany. Rolf Quote
rolfdegen Posted August 27, 2022 Author Report Posted August 27, 2022 Jeannie has new features. Added a 3rd LFO and all LFOs have 64 waveforms.Small video about AMP modulation with LFO 3 Quote
TAGalex Posted February 27, 2023 Report Posted February 27, 2023 Добрый день Рольф! Мне очень понравился Ваш проект Джинни, и так как Вы позиционируете его как открытый, я разработал и изготовил (по Вашим принципиальным схемам ) одноплатный вариант СМД Джинни. Quote
TAGalex Posted February 27, 2023 Report Posted February 27, 2023 8 минут назад TAGalex сказал: Добрый день Рольф! Мне очень понравился Ваш проект Джинни, и так как Вы позиционируете его как открытый, я разработал и изготовил (по Вашим принципиальным схемам ) одноплатный вариант СМД Джинни. Джинни.zip Quote
TAGalex Posted February 28, 2023 Report Posted February 28, 2023 Good afternoon Rolf! I really liked your Jeannie project, and since you position it as open, I designed and manufactured (according to your schematic diagrams) a single-board version of JeannieJeannie.zip's SMD. Quote
rolfdegen Posted April 10, 2023 Author Report Posted April 10, 2023 (edited) Hallo Alex I think the display is not the right type. Hence the display error. The correct display type: https://www.buydisplay.com/st7735-1-8-inch-color-tft-display-module-spi-128x160-arduino-raspberry-pi But you can ask tubeohm.com if he sells a piece. Happy Easter from germany. Rolf Jeannie DIY Project: https://www.sequencer.de/synthesizer/threads/jeannie-polyphonic-diy-synthesizer.160564/ Edited April 10, 2023 by rolfdegen DIY Project link missing Quote
rolfdegen Posted April 10, 2023 Author Report Posted April 10, 2023 (edited) Hi dear synth fans. The Jeannie can now stereo. I reprogrammed the voice distribution in the Jeannie a bit. The eight voices can be distributed arbitrarily in the stereo panorama. In addition, there is now a Unison and Mono mode. Voice distribution in Poly mode: 1.Voice Left 90%, Right 10% 2.Voice Left 80%, Right 20% 3.Voice Left 70%, Right 30% 4.Voice Left 60%, Right 40% 5.Voice Left 40%, Right 60% 6.Voice Left 30%, Right 70% 7.Voice Left 20%, Right 80% 8.Voice Left 10%, Right 90% Voice distribution in mono mode Mono: middle voice Mono-2: 1st voice left, 2nd voice right Mono-3: 1st voice left, 2nd voice middle, 3rd voice right Mono-4: 1st Voice Left, 2nd Voice Left to Center, 3rd Voice Right to Center, 4th Voice Right Mono-6: 1st voice left, 2nd voice slightly left to center, 3rd voice slightly more left to center, 4th voice slightly more right to center, 5th voice slightly right to center, 6th voice right The whole thing can be spread from mono to stereo with the PAN control :) The distribution of votes in Unison mode is still being worked on. Jeannie current Voices Block Edited April 10, 2023 by rolfdegen Change text Quote
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