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    Hallo Jonathan Thanks for your tip. MIDI is...

    Hallo Jonathan

    Thanks for your tip. MIDI is faster if I move the AudioOutputI2S block to the end :)


    Greetings Rolf
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    Current voice block...

    Current voice block
    https://i.ibb.co/VxjGbwF/Jeannie-one-Voice-V104-5.jpg

    My new audioConnection list with waveshaper and gain controll


    AudioOutputI2S PCM5102A;
    ...
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    OK. I found the mistake :rolleyes: It was the...

    OK. I found the mistake :rolleyes:

    It was the position of the waveformMods at the top of the list.

    The oscillator definition (waveformMod) was below in the old list.

    The numbering of the...
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    Hello Jonathan I changed the order list of...

    Hello Jonathan


    I changed the order list of the Audio Connection objects and the error is back. What is wrong :confused:


    New order list with error


    Oscilloscope scope;
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    Hello Jonathan Thank you for your very good...

    Hello Jonathan


    Thank you for your very good explanation. I checked the order of the audio stream objects again. It seems ok.

    I use special oscillator objects from the TSynth core (see code)....
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    If I switch the waveshaper (without an amp)...

    If I switch the waveshaper (without an amp) behind the ampEnvelope it works very well.

    But then I can't control the waveshaper :confused:

    https://i.ibb.co/nbyrj9Z/Voice-V104-4.jpg
    ...
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    Hallo friends.. I use the Waveshaper function...

    Hallo friends..

    I use the Waveshaper function from the Teensy Audio Library in my synthesizer.

    When I press a new midi note, a part (6ms) of the old note can still be heard at the audio...
  8. Hi music fan. Look at here:...

    Hi music fan. Look at here: https://forum.pjrc.com/threads/48308-test-code-for-piezo

    Greetings from germany. Rolf
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    Small correction in the block diagram. The pitch...

    Small correction in the block diagram. The pitch LFO for the oscillator was missing.

    https://i.ibb.co/WDCKw1X/Voice.jpg
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    Hello friends.. We have also integrated a...

    Hello friends..


    We have also integrated a waveshaper for interesting sounds. Andre once uploaded a sound demo on soundcloud.

    Soundcloud:...
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    Hello.. We are almost finished (also with...

    Hello..


    We are almost finished (also with our nerves) and hope that our "Jeannie" including case can be sold on TubeOhm.com in two months.


    Andre turned the buttons again and made some...
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    Hallo Graham Thank you for your very good...

    Hallo Graham

    Thank you for your very good explanation. I will think about it for my project. :confused:

    Greetings from germany. Rolf

    My little "Jeannie" Synthesizer Prototyp
    ...
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    Yes. Thank you for the information. The...

    Yes. Thank you for the information.

    The cutoff frequency now follows the midi note. It wasn't exactly before.

    For filter velocity to 7 octaves, we have limited the resonance to 4.0.

    Direct...
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    This is the table for the filter tracking values....

    This is the table for the filter tracking values. The middle frequency is 440Hz.

    The filter corner frequency and resonance is shifted 100% with keytracking.



    const static float...
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    In the TSynth the key tracking is monophonic. I...

    In the TSynth the key tracking is monophonic. I made it polyphonic in the Voices


    polyphone KeyTracking


    //*************************************************************************
    // play...
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    I want to control the filter tracking over seven...

    I want to control the filter tracking over seven octaves with midi notes.

    These are the keytracking values (Signal) for the FilterModMixer input.


    https://i.ibb.co/L6mF6Hj/Signal-Value.jpg
    ...
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    The calculation must work according to this...

    The calculation must work according to this formula.

    Signal is Filter.tracking value. For frequence shift with 1.octav is signal value 0.14285 (7 octaves)

    24783

    I can't find that in your...
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    Filter Tracking with Resonance issue

    Hallo friends

    I'm using the Teensy Audio Lib for a state variable filter. I control the filter frequency for key tracking via the frequency control input.

    The filter's corner frequency is set...
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    Hello dear Synthians (: We have built in a...

    Hello dear Synthians (:


    We have built in a small distortion stage in front of the digital filter in the software (picture).


    One voice

    https://i.ibb.co/pZCKHHJ/TSynth-1-Voice.jpg
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    No. Its Target 3001 Link:...

    No. Its Target 3001

    Link: https://www.ibfriedrich.com/de/index.html
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    Hello.. The changes to the hardware of the...

    Hello..


    The changes to the hardware of the Jeannie are now complete.


    We had a few minor problems with the power supply and could solve that now.

    Before new boards are ordered,...
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    Hallo John.. Thank you for your development...

    Hallo John..

    Thank you for your development work. I will test it in my synthesizer. :)

    Greetings from germany. Rolf
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    The Fx module The Fx module is plugged into...

    The Fx module


    The Fx module is plugged into the marked socket strips on the back of the Jeannie.


    It contains a SPIN FV-1 24Bit DSP with 15 effects. The first 7 effect programs are set as...
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    Hello.. There are a few more changes. My...

    Hello..


    There are a few more changes. My friend Andre is changing the Jeannie circuit board and integrating the PCM5102A DAC converter.


    Like the other boards, the DAC converter is also...
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    Thanks all for the information. The PCM5102A...

    Thanks all for the information.

    The PCM5102A (right) has very good values for harmonic distortion. I think I using this DAC in my Synth. :)

    https://i.ibb.co/M1VRxRM/PCM5102-A-FFT-Plot.jpg
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    Mixer Behringer QX1222USB Link:...

    Mixer Behringer QX1222USB

    Link: https://www.behringer.com/behringer/product?modelCode=P0AKX

    The measurement signal goes in Mixer analog in and USB out (16Bit 48KHz Samplerate)
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    I use 32Bit DAC PCM5102A and Audacity. The...

    I use 32Bit DAC PCM5102A and Audacity.

    The 440Hz sines wave is generated by AudioSynthWaveform from Teensy 4.1 and LCK 44.1KHz, BCK 2.857MHz.
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    I tested the 24Bit ES9023P from HIFIberry DAC+...

    I tested the 24Bit ES9023P from HIFIberry DAC+ light. It works well too.

    But we will be using a 32Bit PCM5102A. It's a DAC with better quality.
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    Since the DAC chip (PCM5102A) cannot be easily...

    Since the DAC chip (PCM5102A) cannot be easily soldered, we considered using a ready-made converter board (3-6 euros) and plugging it onto the mainboard from behind.


    This eliminates the...
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    Hello dear Synthi friends .. We have now...

    Hello dear Synthi friends ..


    We have now checked our "Jeannie" and everything works flawlessly. Andre listened a little more closely with his trained ears and noticed distortions in the sound.
    ...
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    I am not satisfied with the PT8211. It sounds bad...

    I am not satisfied with the PT8211. It sounds bad in my DIY synthesizer. Because of this, I want to use a different DAC.

    The PCM5102A sounds very good and works very well with Teensy 4.1.
    ...
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    I made another measurement with PCM5201A and...

    I made another measurement with PCM5201A and 44.1KHz in my Teensy 4.1 . It's a good result.

    https://i.ibb.co/LZyD2Tw/PCM5102-A-44-1-KHz.jpg
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    A friend made this measurement with PT8211 ...

    A friend made this measurement with PT8211

    https://i.ibb.co/rdV35XZ/Analog-Sin.png
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    I also measured at 44.1KHz and found no harmonic...

    I also measured at 44.1KHz and found no harmonic distortion with PCM5102A and ES9023P. Only harmonic distortion with PT8211.

    Increasing the sample rate to 88.2KHz with the PT8211 was no...
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    24 Bit DAC for Teensy

    I tested different 24bit DACs on my Teensy 4.1.


    1. PT8211 16-bit DAC
    2. PCM5102A 32-bit DAC Burr Brown
    3. ES9032P 24Bit DAC HIFIberry Board

    Here are spectrum analysis from DACs. The sample...
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    Yes.. I think so :cool:

    Yes.. I think so :cool:
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    My friend Andre is busy soldering. I'm curious .....

    My friend Andre is busy soldering. I'm curious ..

    Soldering the components shouldn't be a problem. I hope the SMD pads are not too small and can be soldered well. :)
    ...
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    Hello.. It won't be long before we can hold...

    Hello..


    It won't be long before we can hold the circuit boards in our hands and then test them.


    My friend Andre has already published the "Jeannie" project on his homepage tubeohm.com.

    ...
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    @alfrede We are waiting for the first boards. It...

    @alfrede
    We are waiting for the first boards. It will take a while before circuit boards or kits can be ordered.

    @trevorbryden
    The Jeannie Synth-core is a little different from TSynth. It's...
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    LUT version is a good suggestion. This is done in...

    LUT version is a good suggestion. This is done in the 8Bit Shruthi Synthesizer from Mutable instruments.




    // Copyright 2009 Olivier Gillet.
    //
    // Author: Olivier Gillet...
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    Hi Daniel The PCB boards or DIY kit with case...

    Hi Daniel

    The PCB boards or DIY kit with case can be ordered in future from Tubeohm.com.

    You don't need an audio card. An 16Bit audio converter (PT8211) is fitted on the board.

    Greetings...
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    Hallo friends.. Now we are done and we start...

    Hallo friends..

    Now we are done and we start producing circuit boards in China :)

    https://i.ibb.co/6DvvHGC/Jeanny-PCB1.jpg

    https://i.ibb.co/P1MbYKT/Jeanny-PCB2.jpg
    ...
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    Hallo friends :) The board is now ready. We...

    Hallo friends :)


    The board is now ready. We thought about integrating an expansion connection (K4, K8 ) in the synthesizer for the electronics hobbyist).


    It consists of 3 analog inputs...
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    It is progressing .. The 3D model of the...

    It is progressing ..


    The 3D model of the motherboard. 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.
    ...
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    what was the issue :confused:

    what was the issue :confused:
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    Please. Can you draw that ?

    Please. Can you draw that ?
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    Hello Edwin. Thanks for the good tips. I will...

    Hello Edwin. Thanks for the good tips. I will check it.

    Greetings. Rolf
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    Power circuit for my teensy synth.. Link:...

    Power circuit for my teensy synth..

    Link: https://forum.pjrc.com/threads/63255-New-Teensy-Synth-quot-Shruthi-2-quot?highlight=Teensy+Shruthi

    23898

    23899

    23900
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    The 1st draft in 3D ...

    The 1st draft in 3D

    https://i.ibb.co/zXbw5jK/Jeanny1.jpg
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    The design is not final yet :confused:

    The design is not final yet :confused:
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