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    Thanks for the replies. I looked at the 4067...

    Thanks for the replies. I looked at the 4067 datasheet and wondered if it was nearing the limit of how fast it could be reliably read. I should probably stop being lazy and put a scope on it and get...
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    Ferrite 600 and noisy MUXs on T4.1

    Hello I'm moving from a T3.6 to a T4.1. My MUXs have a lot of noise when reading analog signals now (from the 600MHz MCU?) I have a separate ground plane for the pots I'm reading. I want to...
  3. Thread: T4.1 Schematic

    by UHF
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    Teensy 4.0 does not appear to have an AGND...

    Teensy 4.0 does not appear to have an AGND according to it's schematic.
  4. Thread: T4.1 Schematic

    by UHF
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    Ok, sometime soon. I've got @blackketter 's T4.1...

    Ok, sometime soon. I've got @blackketter 's T4.1 KiCAD symbol and just wanted to know if pin 25 aka 47 :confused: (top right GND) is still AGND? Thanks anyone.
  5. Thread: T4.1 Schematic

    by UHF
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    T4.1 Schematic

    Hello, is there a schematic for T 4.1 please?
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    https://forum.pjrc.com/threads/59185-help-reseting...

    https://forum.pjrc.com/threads/59185-help-reseting-the-phase-of-sine
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    Oh crikey!!! Yes the Audio Library can...

    Oh crikey!!! Yes the Audio Library can seductively carry you away! Your wiring is quite neat considering the audacity of so many controls and LEDs. You've got multiple waveforms mixing together,...
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    The ADC on the Uno has an input impedance of 100M...

    The ADC on the Uno has an input impedance of 100M and possibly a significant input capacitance, compared to the K66 on the T3.6 (up to 5K). The Uno is less sensitive to the noise.
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    Hello, your voltage divider resistors have...

    Hello, your voltage divider resistors have significantly high resistance, why do they need to be so high? The 16-bit ADC is only getting a few microamps of current, the noise is probably also of the...
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    Thanks. Running InputFunctions gives some SysEx...

    Thanks. Running InputFunctions gives some SysEx messages which I'm assuming are specific to the controller when it first connects, plus the selection of controller messages it's chosen to send....
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    USB Host port connection detection

    Hello, sorry if I've missed this elsewhere in the forum. I want to detect when a MIDI controller is plugged into the USB Host port of a T3.6. Is there a callback that I can use to detect this? I want...
  12. I really don't envy your task, trying to...

    I really don't envy your task, trying to accommodate variations of what often appear to be the same displays. Again, thanks for both your efforts and for frame buffering! That really made a massive...
  13. My display is a ST7735S by the way, the library...

    My display is a ST7735S by the way, the library only mentions ST7735B and ST7735R screens, hence the INITR initialisers.
  14. I agree, tab colours don't work except for...

    I agree, tab colours don't work except for Adafruit displays with slightly better controlled supplies.
  15. // This Teensy3 native optimized version requires...

    // This Teensy3 native optimized version requires specific pins
    #define sclk 20 // SCLK can also use pin 14
    #define mosi 21 // MOSI can also use pin 7
    #define cs 2 // CS & DC can use pins 2,...
  16. // This Teensy3 native optimized version requires...

    // This Teensy3 native optimized version requires specific pins
    #define sclk 20 // SCLK can also use pin 14
    #define mosi 21 // MOSI can also use pin 7
    #define cs 2 // CS & DC can use pins 2,...
  17. Ok INITR_MINI160x80 works... but blue and red are...

    Ok INITR_MINI160x80 works... but blue and red are swapped, which is why I never used it previously. I still have to invertDisplay(true). The business with the tabs is quite hit and miss. Frame...
  18. Hello, it's a 0.96" ips 160 x 80 spi with a...

    Hello, it's a 0.96" ips 160 x 80 spi with a ST7735S. One of these:...
  19. This is nothing to do with fonts but I'll post...

    This is nothing to do with fonts but I'll post here. drawLine(...) causes pixels to be drawn over the screen when diagonal. Horizontal and vertical lines are fine.

    Arduino 1.8.12 TD1.51 on a T3.6...
  20. Here's some code that demonstrates it. Including ...

    Here's some code that demonstrates it. Including <Adafruit_GFX.h> before <ST7735_t3.h> clears up the problem with font references. Thanks for looking into this.

    On 1.48
    19655

    On 1.51
    19656
  21. Also something's happened with references to...

    Also something's happened with references to fonts between 1.48 and 1.51.

    #include <Fonts/FreeSansBold18pt7b.h> or #include "Fonts/FreeSansBold18pt7b.h" no longer work. An absolute reference...
  22. Also a problem on T3.6.

    Also a problem on T3.6.
  23. I just want to correct something I stated...

    I just want to correct something I stated earlier, LP38691 is outputting 3V3 not 5V. This is what Teensy 3.6 appears to be designed to work with, 3V3, even if the MCU will go down to VDD 1.71V....
  24. Hello. Well you already know the obvious answer...

    Hello. Well you already know the obvious answer is that 3V is too low. Vin needs 3.6-6.0V. If you look at the schematic: https://www.pjrc.com/teensy/schematic.html, LP38691 regulates a 2.7 to 10V...
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    This comes a fortnight too late perhaps, but...

    This comes a fortnight too late perhaps, but someone may find it useful. The objects on a GUI are usually known as widgets. https://github.com/AndreiDegtiarev/AWind is one such library that appears...
  26. Thread: envelope follower

    by UHF
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    Hello, how about using the Peak object to find...

    Hello, how about using the Peak object to find the amplitude and using this value (multiplied by some constant) to adjust the cutoff frequency? There is a PeakMeterMono example sketch that samples...
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    Hello, thanks for all the interest. This will...

    Hello, thanks for all the interest. This will probably be a last update. Further information for those interested will be here electrotechnique.cc. The PCBs arrived last week and I'm pleased with the...
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    The PC900 opto-isolator has been long since...

    The PC900 opto-isolator has been long since discontinued. Use a 6N137 in it's place. The pin out is different, but there are plenty of example circuits for MIDI in. A 6N138 based circuit would be...
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    He's 0x00000032 apparently ;) We missed it.

    He's 0x00000032 apparently ;) We missed it.
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    Happy (belated) Birthday Paul Stoffregen!!!

    The big day March 1st! A major one too. Sorry we were too engrossed in using your great products!:D
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    Yes that looks good: 19264 It goes back in...

    Yes that looks good:
    19264

    It goes back in the centre, rather than the end.
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    Having watched the video at 12:00, the Maschine...

    Having watched the video at 12:00, the Maschine MK3 seems to just have a normal (detent-less? - non-clicking) encoder. Arturia use these on their products like the Minilab. They rotate freely with...
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    Hello, you piqued my interest with this post....

    Hello, you piqued my interest with this post. There's obviously a correct way of coding this, that's neat and no doubt, mathematical. I don't have the exact answer, but this is a form of absolute...
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    A monosynth for $399 hmmm... or a programmable...

    A monosynth for $399 hmmm... or a programmable poly for $99.
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    Hello, I'm using KiCAD. I'm trying to get a...

    Hello, I'm using KiCAD. I'm trying to get a decent looking front panel silkscreen and am also playing about with Eagle on Fusion 360. The front panel will be red with white graphics, although JLC...
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    Great to see it coming on! Have you made a sound...

    Great to see it coming on! Have you made a sound yet!?

    Hello, yes TSynth is now six note polyphonic and this is the limit on a T3.6. I've designed a PCB and am working on the accompanying PCB...
  37. Hello, if it works perfectly with a test program,...

    Hello, if it works perfectly with a test program, then we can assume your soldering is fine?! What resistance value are the pots, out of interest?
    Can you share the code that reads from the...
  38. Hello I've no experience here, but the first...

    Hello I've no experience here, but the first thing that comes to my mind is - is there a time difference between left and right signals? This could be introduced any where in the signal path...
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    Yes that's correct.

    Yes that's correct.
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    Hello, if you want to reset to the start (0...

    Hello, if you want to reset to the start (0 degrees phase) you'll probably need to modify the AudioSynthWaveformSine object (synth_sine.h and synth_sine.cpp) because I believe, setting phase(0)...
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    If you play all 6 voices/notes at once, do you...

    If you play all 6 voices/notes at once, do you get noises? The order of the audio objects needs to have objects created in order of audio signal flow and this includes objects feeding back to...
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    Hello, could we see your code please,...

    Hello, could we see your code please, particularly the audio objects and connections - having objects created in the 'wrong' order will cause unwanted noise.
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    Wow it's coming on! I didn't use a breakout...

    Wow it's coming on! I didn't use a breakout board, just a normal 5x7cm protoboard. The Teensy is mounted on pin sockets and all the pins broken out to right-angle pin headers. As mentioned, I use Du...
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    Hello Archie. That's great! Have you got just the...

    Hello Archie. That's great! Have you got just the basic Teensy + audio board producing sound with a MIDI keyboard?
    Yes, the rotary switches have resistors (all about 1k5) between each pole in...
  45. You've come to the rescue! Thanks, exactly what I...

    You've come to the rescue! Thanks, exactly what I was looking for.
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    Hello, I've seen the breakout boards. My...

    Hello, I've seen the breakout boards. My intention is to simply make a PCB and front panel and the rest is up to the individual to get the components and solder them. I want to make this as easy as...
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    Hello, many thanks for the front page feature....

    Hello, many thanks for the front page feature. Just an update - TSynth is just about completely nearly finished :D. The synth part hasn't changed except key tracking works individually for each note...
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    The pins unused by the audioboard can be used. ...

    The pins unused by the audioboard can be used.
    I made this overlay for my project:
    https://forum.pjrc.com/attachment.php?attachmentid=16714&d=1559444315
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    Here it is. Can you look at the lfoRate() method....

    Here it is. Can you look at the lfoRate() method. I've assumed 100 COUNTS_PER_LFO is 6Hz and used that as the basis for converting LFO rate in Hz to countsPerLfo. This probably isn't correct but it's...
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    I've added a method to alter COUNTS_PER_LFO and...

    I've added a method to alter COUNTS_PER_LFO and it gives a nice lfo rate effect, ranging from 500 to 50 exponentially.
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