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  1. Hello friends. I found a solution. In the...

    Hello friends.

    I found a solution.

    In the ST7735_t3 Lib from PaulStoffregen there is a function asynchronous updates (frame buffer). With this I can deactivate the constant redrawing of the...
  2. Hi friends I still have a problem with the...

    Hi friends

    I still have a problem with the framebuffer. When I use texts and drawings are not displayed permanently :confused:

    example



    tft.fillScreen(ST7735_BLACK);
    tft.setCursor(0,0);
  3. Yes. My DIY synth project "Degenerator" is be...

    Yes. My DIY synth project "Degenerator" is be over. Link: https://www.tubeohm.com/de-generator.html

    I'm working on a new DIY synth project "Jeannie". Its a 8 voices polyphonic Synth with 16Bit and...
  4. Here is my complete code change for...

    Here is my complete code change for oscilloscopes.

    Oscilloscope.h


    #ifndef Oscilloscope_h_
    #define Oscilloscope_h_
    #include "AudioStream.h"
    #include "ST7735_t3.h"
    #include <Adafruit_GFX.h>
  5. Hallo.. I change the trigger function in the...

    Hallo..

    I change the trigger function in the Oscilloscope. Now I test 8 samples in the audio stream for triggering. Redrawing rate for screen its better.

    If no triggering then draw old buffer...
  6. Thanks. I will try too :)

    Thanks. I will try too :)
  7. Try this: Turn off the ADC input pins ...

    Try this: Turn off the ADC input pins

    example


    pinMode(14, INPUT_DISABLE);


    Greetings Rolf
  8. See this:...

    See this: https://www.instructables.com/Adding-CS-Pin-to-13-LCD/

    Link: https://forum.pjrc.com/threads/57015-ST7789_t3-(part-of-ST7735-library)-support-for-displays-without-CS-pin

    I hope I could...
  9. Hi friend Yes do that. I still have a problem...

    Hi friend

    Yes do that. I still have a problem with the sample rate and trigger function.

    The sample rate is too high and low frequencies are not displayed completely.

    The trigger only works...
  10. Hi fmenes The waveforms in the oscilloscope...

    Hi fmenes

    The waveforms in the oscilloscope are now drawn in lines. The screen is flicker-free and has no speeks (see my video).

    Video: https://youtu.be/ixhqq_wxLYI

    Link:...
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    Hallo friend.. The waveforms in the...

    Hallo friend..

    The waveforms in the oscilloscope are now drawn in lines. The screen is flicker-free and has no speeks (see my video).

    22373

    Video: https://youtu.be/ixhqq_wxLYI
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    I use Tsynth's oscilloscope in my DIY...

    I use Tsynth's oscilloscope in my DIY synthesizer. Waveform drawing flickers and have speeks (see my video).

    22366

    Video: https://youtu.be/HmxVKU90UlU


    The problem: The trigger function is...
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    Hallo manicksan No. It only looks like this...

    Hallo manicksan

    No. It only looks like this because many modules are on top of each other.

    Take a look at my export file from Designe tool. Its for 8 voices.



    // GUItool: begin...
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    Flickering in oscilloscope The flickering and...

    Flickering in oscilloscope

    The flickering and Pixel disturbance into the oscilloscope function is the trigger flag (crossing flag) when drawing the waveform.
    When trigger (crossing flag) is...
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    Thanks. The problem is solved without Quotes at...

    Thanks. The problem is solved without Quotes at the beginning of the line:)



    const static char* INITPATCH = "INIT,1.00,0.43,0.00,0,0,0.99,1.00,0.00,1.00\...
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    Word wrap error! wy ? error: invalid...

    Word wrap error! wy ?


    error: invalid operands of types 'const char [41]' and 'const char [77]' to binary 'operator+



    const static char* INITPATCH =...
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    Hey everyone .. I once tried to display the...

    Hey everyone ..

    I once tried to display the audio block from a total of 8 voices.

    The unused inputs of "voiceMIxer1" and "voiceMixerM" are used by the other voices.

    "waveformMod1a" and...
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    If the frame buffer is switched off and the...

    If the frame buffer is switched off and the oscilloscope switched on, the image display above is destroyed. But the oscilloscope display no longer flickers :confused:



    void setupDisplay() {
    ...
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    I have limited the screen area for the output of...

    I have limited the screen area for the output of the samples to the lower half of the display.

    I want to use Bresenham's algorithm for drawing lines. Link:...
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    Hallo UHF Your TSynth is a very nice DIY...

    Hallo UHF

    Your TSynth is a very nice DIY project.

    The code core of "Jeannie" is from TSynth. I adapted it to my hardware and reduced the voices to 8.

    I would like to add a few more...
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    First test with 8 Voices. The oscilloscope...

    First test with 8 Voices.

    The oscilloscope function is not yet perfect and is still being changed.
    It is probably due to the framebuffer for the display.

    22318

    Video:...
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    No. I have 2 pieces with a breadboard.

    No. I have 2 pieces with a breadboard.
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    No. I have tested the PT8211. The SGTL5000 makes...

    No. I have tested the PT8211. The SGTL5000 makes a better sound and has Filter and bass boost built-in.
  24. Hi I solved the problem with the incorrect...

    Hi

    I solved the problem with the incorrect colors.

    In the initialization for the display I changed INITR_GREENTAB for INITR_BLACKTAB.

    Framebuffer and colors now work correctly :)

    22302
  25. Thanks. I will check that :confused:

    Thanks. I will check that :confused:
  26. OK. I still have a little problem. The colors are...

    OK. I still have a little problem. The colors are not right. Where could that be?

    red = blue

    geen = neon

    blue = red
  27. Hallo vjmuzik Thanks for your tip. I found the...

    Hallo vjmuzik

    Thanks for your tip. I found the mistake. It was an incorrect initial value for colstart and rowstart in initialization function (Rcmd1). The values must be zero.

    Code excerpt...
  28. Hallo fiends I'm using a ST7735 color TFT 1.8...

    Hallo fiends

    I'm using a ST7735 color TFT 1.8 inch RGB display and have a problem with the framebuffer.
    If the framebuffer is disabled then the display is ok. If the framebuffer is switched on,...
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    It will take a little longer. I am currently...

    It will take a little longer. I am currently developing the oscillator page.

    This is my current synth block.

    22219

    Greetings Rolf
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    Hi Ok I think the problem is with the audio...

    Hi

    Ok I think the problem is with the audio buffer. I will use another audio function with sync for the waveform oscillators.

    Here is an example from UHF from the forum



    ElectroTechnique...
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    Hallo friends :) Yes that would be nice. I...

    Hallo friends :)

    Yes that would be nice. I don't need ethernet for my synth. But I would leave the USB host connection.
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    Waveform phase problem

    Hello friends
    I cannot start the LFO phase with Midi NoteOn at zero degrees. The phases are synchronous but continue to run. What am I doing wrong.


    ...
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    OK. It was my fault. It was the wrong...

    OK. It was my fault. It was the wrong filter_variable.h file in the Arduino Lib folder.
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    Hallo friends :) I have a little problem with...

    Hallo friends :)

    I have a little problem with the resonance in the filter. I use an A State Variable (Chamberlin) filter with 12 dB / octave.
    When I set the resonance to maximum level, the filter...
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    Hallo Here my Audio designe code ...

    Hallo

    Here my Audio designe code



    #include <Audio.h>
    #include <Wire.h>
    #include <SPI.h>
    #include <SD.h>
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    Hello friends :) Today I implemented the key...

    Hello friends :)

    Today I implemented the key tracking for the filter. The digital multimode filter has one
    Control input with the designation octaveControl (). This can be used to control the...
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    Thanks :) I love the small details, for...

    Thanks :)

    I love the small details, for example a small peak meter at the top.
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    Hallo friends :) I optimized the potentiometer...

    Hallo friends :)

    I optimized the potentiometer request in the ADC setup settings.
    This prevents the potentiometer values from jumping accidentally on the menu pages.

    Envelope menu
    22112
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    From today we will dance in several voices:...

    From today we will dance in several voices: cheer:

    Teensy Synth
    22085

    Synth block
    22087


    The "Shruthi 2" now has 6 voices and plays polyphonically. I think you can expand that to 8...
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    Hello friends I have a method for better...

    Hello friends

    I have a method for better reading from analog read. There is a lot of noise when analog.update() is right after by analog.getValue(). That's why I executed analog.update () in...
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    Its AudioBlock from Shruthi 2 ...

    Its AudioBlock from Shruthi 2

    https://i.ibb.co/5YnPwjp/Synth-Block.jpg
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    I use the Audio Lib and later part of the Shruthi...

    I use the Audio Lib and later part of the Shruthi syntheses.

    It's a Phoenix / Shruthi board without filters from tubeohm.com

    https://i.ibb.co/hZM4Cx7/Shruthi2.jpg
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    First sound on my Teensy Synth "Shruthi 2" ...

    First sound on my Teensy Synth "Shruthi 2"

    Video: https://youtu.be/ffCMaR70G6g

    https://i.ibb.co/Bnn5J9M/Filter-curve.jpg
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    Thanks for the link. Its very intresting :)

    Thanks for the link. Its very intresting :)
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    Hi Alan I wrote my own code. The basis is a...

    Hi Alan

    I wrote my own code. The basis is a special sine table for drawing the filter curve.




    //*************************************************************************
    //...
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    Thanks for your information. It's complicated.

    Thanks for your information. It's complicated.
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    They are digital filters. The filter curve is...

    They are digital filters. The filter curve is only symbolic and is controlled by the parameters Cutoff and Resonance.
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    My "ArduStudio7" ;) ...

    My "ArduStudio7" ;)

    https://i.ibb.co/h1dvfvn/Ardu-Studio7.jpg

    Thanks everybody
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    Draw filter curves on the display

    I am bad at arithmetic. That's why I need some support to draw filter curves on the display. I found an example and changed something. The curve looks like a low pass with a strong response. I need...
  50. You can also use a switched power regulator. This...

    You can also use a switched power regulator. This is compatible with the 7805 and does not need a heat sink, e.g. Recom R-78E5.0-0.5
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