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Type: Posts; User: Rolfdegen

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  1. Replies
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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...
  18. 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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    Hello friends I have installed the current...

    Hello friends

    I have installed the current Visual Micro plugin for AtmelStudio 7. Compiling is now very quick. Thanks for the great support :) :) :)
  20. Hi luni. Thank you for your great tip with...

    Hi luni. Thank you for your great tip with ResponsiveAnalogRead. The ADC noise is very low and my potentiometer settings are very stable. :)
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    Thanks for the hint. For this reason I am...

    Thanks for the hint. For this reason I am currently only using Atmel Studio 7 as comfortable editor for my arduino sketch.
  22. I want to try it and I will report. Tanks ..

    I want to try it and I will report. Tanks ..
  23. ADC noise and potentiometer query Video:...

    ADC noise and potentiometer query
    Video: https://youtu.be/Cuzt2-V0pK0
  24. But.. the adc noise is not better (:. Now i have...

    But.. the adc noise is not better (:. Now i have installed 100nF caps on the pots.
    It's not an improvement. Now I want to try to reduce the sample rate.

    Can I do that in Teensy 4.1 board ?
  25. Now I have improved the ADC query. ...

    Now I have improved the ADC query.



    //-----------------------------------------------------
    // read Pots
    //-----------------------------------------------------
    void read_pots (void)
    {
    ...
  26. Ok I understand this. But..the max return value...

    Ok I understand this. But..the max return value cannot be greater than 127 !?
  27. read pots ...

    read pots


    //-----------------------------------------------------
    // read Pots (ADC resolution 12Bit )
    //-----------------------------------------------------
    void read_pots (void)
    {
    ...
  28. My Prototyp :)...

    My Prototyp :)
    https://i.ibb.co/m0ypHVn/20200928-175112.jpg
  29. I want to set envelope parameter from 0-127 in my...

    I want to set envelope parameter from 0-127 in my Synth. These must be stable.
  30. Thanks for your tip :) I think the right way...

    Thanks for your tip :)

    I think the right way would be to find the cause of the spikes. With 12-bit resolution, a little noise is normal. But at 7Bit it is not normal (see my test results).
    ...
  31. Hallo Teensy friends :) I connected 4...

    Hallo Teensy friends :)

    I connected 4 potentiometers to the analog inputs of Teensy 4.1. Each potentiometer has a pin on 3.3V and GND. The ADC result is very noisy and unstable. I've already tried...
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    Many Thanks. I want to try it. Although I'm not...

    Many Thanks.
    I want to try it. Although I'm not an expert in Windows programming ;)
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    Oh.. I forgot to mention that I'm using Windows...

    Oh.. I forgot to mention that I'm using Windows 10.
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    Hallo defragster Thank you for your help....

    Hallo defragster

    Thank you for your help. Compiling with Atmel Studio 7 works well with the Visual Micro plugin for AtmelStudio. I also get error messages on the AtmelStudio console. But when I...
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    Thanks a lot :)

    Thanks a lot :)
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    Hallo Teensy friends :) I use Teensy 4.0 and...

    Hallo Teensy friends :)

    I use Teensy 4.0 and Teensy 4.1 boards and work with AtmelStudio 7. The compiler in AtmelStudio is very slow. That's why I compile my code with Arduino 1.8.13. This is much...
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    Unfortunately, I cannot edit my post. The image...

    Unfortunately, I cannot edit my post. The image title is incorrect. It is called with noise not without. Sorry ..
  38. Use a 7805. It can load 1A with cooling. When...

    Use a 7805. It can load 1A with cooling. When running at 600 MHz, Teensy 4.0 consumes approximately 100 mA current.

    Best regards. Rolf
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    Hallo lokki :) I tested the ADC in the Teensy...

    Hallo lokki :)

    I tested the ADC in the Teensy 4.1. The ADC is very noisy. A resolution of 12 bits is hardly usable. The ADC reference voltage is coupled to VCC. That is a big problem. External...
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    OK.This is Pin function now: #define TFT_SCLK...

    OK.This is Pin function now:

    #define TFT_SCLK 27 // SCK1
    #define TFT_MOSI 26 // MOSI1
    #define TFT_CS 6 // CS & DC can use pins 2, 6, 9, 10, 15, 20, 21, 22, 23
    #define TFT_DC 9 // but certain...
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    I think I found a solution. I swapped the Display...

    I think I found a solution. I swapped the Display connections MOSI and SCK to MOSI1 and SCK1 on teensy board.
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    Hallo I have a problem with the playback of...

    Hallo

    I have a problem with the playback of PWM sound and TFT display. I have no PWM sound on pin 10 + 12 when using the display driver.
    The PWM sound works without display driver.



    //...
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    New Teensy Synth "Shruthi 2"

    Hi there...

    I am currently developing a new DIY synthesizer based on a
    Teensy 4.0 Boards. The synthesizer will look similar to the small
    Shruthi Synthesizer from Mutable Instruments. Compared...
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    Yes. It works. Thanks a lot :) #include...

    Yes. It works. Thanks a lot :)



    #include <Wire.h>
    #include <SPI.h>
    #include <SD.h>
    #include <SerialFlash.h>
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    Do you have an example for me Thanks :)

    Do you have an example for me Thanks :)
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    Here the test without audio interface. I read...

    Here the test without audio interface. I read only ADC input (10Bit). Its same problem.

    code


    #include <Wire.h>
    #include <SPI.h>
    #include <SD.h>
    #include <SerialFlash.h>
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    Thanks for your help. I will test this :)

    Thanks for your help. I will test this :)
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    I do not understand. What is the problem with...

    I do not understand.
    What is the problem with reading an ADC register :confused:


    The ADC value (10bit resolution) is Interruption from 492 to 656. The following values from 656 up to 4095 are...
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    I do not understand. What is the problem with...

    I do not understand.
    What is the problem with reading an ADC register :confused:
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    Hallo I have installed Arduino 1.8.13 and...

    Hallo

    I have installed Arduino 1.8.13 and Teensyduino 1.53. I have change resistor from 50K to 10K. Its same Problem.

    The adc resolution ist 10Bit. I will set Oscillator parameters with an...
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