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  1. LP filter : linking cut off frequency with note

    Hello,

    I am building a simple synth with a low pass filter. I don't know what is the rule to link to frequency of a played note with the cut off frequency of the filter.
    I tried something very...
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    Big thank you ! Light !

    Big thank you !
    Light !
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    what to do with SAMPLE and HOLD

    Hello,

    Sorry this may be quite a stupid question...

    What kind of sound and effects can you produce when using Sample and Hold waveform ?
    I have been playing with it, and all I can get are...
  4. Thanks for making it clear ! I have tested a...

    Thanks for making it clear !
    I have tested a micro USB <--> micro USB connection : it fails. So yes, you definitely need a HOST USB port.
    Emmanuel
  5. Thank you ! Another question : is it possible...

    Thank you !

    Another question : is it possible to connect directly my sequencer (T-LC) into a T3.2 synth, using a micro USB <--> micro USB cable ?
    I don't have such a cable for the moment... ...
  6. USB MIDI : how to connect Teensy sequencer + Teensy synth + ext Keyboard ?

    Hello,

    I am lost with USB MIDI.
    I have build :
    - a (basic) sequencer with a Teensy LC.
    - a synth with a Teensy 3.6. I have wired the MIDI HOST and it is working.

    I don't know how to...
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    Thank you Mark, Using phase modulation greatly...

    Thank you Mark,

    Using phase modulation greatly improved the result.
    I am trying know to dig in your code to understand your approach...
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    FM synthesis, unpredictable ?

    Hello,

    I am playing with FM synthesis, but I can't get "musical" results. The notes I produce are very quickly out of tune. Mastering a consistant pitch seems to be difficult.
    I tried to link the...
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    Yes of course ! You are right, there are just...

    Yes of course !
    You are right, there are just standard messages... I didn't get the point at the first reading.
    So my question is a little stupid !
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    Thank you. I can't figure out how to receive...

    Thank you.

    I can't figure out how to receive them as "raw CC midi message". Do you have an idea ?
    Emmanuel
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    receiving RPN an NRPN MIDI messages ?

    Hello,

    I wonder if it is possible to receive (via usb MIDI) RPN and NRPN midi messages from a controller ?
    Is there specific handlers to receive these messages ?
    I only know it is possible to...
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    I2c speed and overclocking

    Hello,
    I wonder if there is some kind of incompatibility when using overclocking and the I2c bus.
    I have build a synthethiser with a T3.2. To get more polyphony, I am using overclocking. It works...
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    Hi, I have tested this reverb. It is just...

    Hi,

    I have tested this reverb. It is just great. It sounds really better than freeverb. It would be nice indeed if it was merged !
    Emmanuel
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    Thank you. It works ! Emmanuel

    Thank you.
    It works !


    Emmanuel
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    Teensy 4 with TWO pcm5102 DAC ?

    Hello,

    I have been using the PCM5102 for various projects. These DACs are cheap and deliver high quality audio.
    I am wondering if it is possible to use 2 of them to get 4 audio channel outputs ?...
  16. difference between midi host and midi device modes ?

    hello,

    I am getting confused with usb midi "host" and "device" modes.
    I have read here that the built-in micro usb is configured in device mode. It can send and recieve MIDI. So what is the...
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    Thank you. These examples are clear. I think I...

    Thank you.
    These examples are clear. I think I know how to start.

    I have another question. What could be the way to implement shuffle function ? Shuffle adds some "swing" in the tempo. I wonder...
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    MIDI sequencer : need directions

    Hello,

    I would like to build a MIDI sequencer. I don't know how to implement a solid timebase to trigger midi events.

    For instance, let's consider the way I could generate the MIDI clock...
  19. Hi Adrianfreed, Are you the author of the...

    Hi Adrianfreed,

    Are you the author of the brilliant fastTouch library ?
    If so, here is a big thank you. Your library is absolutely great. I have used it for this little project.
  20. Hi AlainD Bigger electrodes tend to give a...

    Hi AlainD

    Bigger electrodes tend to give a stronger signal, but it is nor really important. I have 1 cm electrodes to change octave and it works.
    Yes I have designed my electrodes. But of course...
  21. Hi Aidyw I tried your code for a synth...

    Hi Aidyw

    I tried your code for a synth project. It works ! This is great !!
    I was able to save CPU time to and add new features.

    I tried to include your code as an independent library in my...
  22. Hello, I have added a drum set to play beats....

    Hello,

    I have added a drum set to play beats.
    I have also made a little android app to program sounds from your smartphone.
  23. OK. I will do that. I am afraid it is going to be...

    OK. I will do that. I am afraid it is going to be tedious to read...
  24. Hi Paul, Thank you for your feedback. So if...

    Hi Paul,
    Thank you for your feedback.

    So if there is anybody that would be OK to help me to review my code, I would appreciate a lot.
    I can comment my code to make it as clear as possible and...
  25. Hi Alain, My electrodes consist of 2 tracks....

    Hi Alain,

    My electrodes consist of 2 tracks. The first one is connected to a Teensy pin, the second to the ground (see the joined doc). Doing this way makes possible to operate the synth with...
  26. Hello Jay, I am thinking of packing this project...

    Hello Jay,
    I am thinking of packing this project with a "how-to" guide. But it takes a lot of time ! I think my code also needs to be reviewed by a qualified coder. But if many people ask, I would...
  27. MiniTouch : low cost T3.2 synth for children workshops

    Hello,

    Here is a simple project I am happy to share. I have designed this compact and low cost synth especially for children workshops. It is easy to build and play. Children from 10 are able to...
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    Thank you Blackaddr, I will need some time to...

    Thank you Blackaddr,

    I will need some time to understand all of this but I am going to dig in it !
    I tried the polyBleps oscillator described here : ...
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    Thanks Mark. I have tried polyBLEPS. It works...

    Thanks Mark.
    I have tried polyBLEPS. It works but still to much CPU load for more than 3 voices.
    I am going to look to the other links you mentioned. I am afraid it is going to be hard for me to...
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    band limited oscillator with T3.2

    Hello,

    I have made a small synth using the new BAND_LIMITED_SAWTOOTH and BAND_LIMITED_SQUARE oscillator waveforms. It sounds much better than the non-band limited waveforms. However, it seems to...
  31. capacitive sensors on battery operated project

    Hello,

    I would like to know how you are designing capacitives sensors with Teensy boards and maybe have some feedback about the way I do it.

    I read 26 capacitive sensors for a battery operated...
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    Thanks a lot, it makes sense.

    Thanks a lot, it makes sense.
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    aritrary waveforms

    Hello,

    I have been playing with arbitrary waveforms. It works well. I have tried some of these examples :
    https://github.com/DatanoiseTV/AKWF_WaveForms

    But there is something I don't...
  34. Yes I have replaced '.' by '->'. I will try...

    Yes I have replaced '.' by '->'.
    I will try arrays of objets, it is new to me.
    Thaks
  35. Thank you ! I follow your idea using pointers...

    Thank you !
    I follow your idea using pointers and it works .
  36. C++ how to increment objects name in a loop ?

    Hello,

    I am not a C++ expert... and I don't know how to compact this kind of code in a loop :

    }
    pot0.update(output[0]);
    pot1.update(output[1]);
    pot2.update(output[2]);
    ...
  37. DAC and headphones, what is really possible or not ?

    Hello,

    I have been playing for a while with Teensy boards and here is a question about te builtin DAC. I must confess I have hooked headphones to the T3.2 DAC. I have put a capacitor to cut DC and...
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    My battery delivers 5V. I'll find a reference for...

    My battery delivers 5V. I'll find a reference for the regulator.
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    Hi Mark, Here is a simplified schematic. The...

    Hi Mark,

    Here is a simplified schematic.
    The Teensy board is hooked to a battery pack via USB. My amp is powered via Vin pin (= battery). It works but I get "digital" noise. I tried Analog GND...
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    Thanks Mark. I have a few class D chip PAM8403....

    Thanks Mark.
    I have a few class D chip PAM8403. It is better, but I still have coupling problems.
    Is it possible to have 2 fully isolated power rail from 1 battery ?
    Emmanuel
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    Sorry... it is TDA2822. The problem is not the...

    Sorry... it is TDA2822.
    The problem is not the chip I think, but noise coupling. I made test with other amps, same results. When I use an external amp with its own power supply, there is no noise....
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    ampli & Teensy on same power rail

    Hello,

    For a little portable synth, I try to power a T3.6 & a small amp (TDA 1822) with the same battery. It is working but I can't get completely rid off noise. I think I don't have any ground...
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    capacitive sensors and battery

    Hello,

    I know it is very difficult to deal with capacitive (touch) sensors with battery powered circuits. I read threads about the way to make it work :

    - First solution : 2 plates electrodes...
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    Thank you for your help. If it's a memory issue,...

    Thank you for your help.
    If it's a memory issue, there is no way I can use a T3.2.
    I tried to allocate more memory with AudioMemory(), but it doesn't work.
    I think I am going to use standard...
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    Hello, Here is a simple code that crashes my...

    Hello,

    Here is a simple code that crashes my Teensy 3.2.
    I use the builtin DAC.
    There is probably some kind of incompatibility between freeverb and band limited waveforms oscillators.
    Emmanuel...
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    Hello, I noticed a bug when using band-limited...

    Hello,

    I noticed a bug when using band-limited waveforms and freeverb. My T3.2 crashes when playing high pitch notes. No problem when using standard waveforms.
    My code is rather long. I am going...
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    Hi, Just to say thanks for this release. Band...

    Hi,

    Just to say thanks for this release.
    Band limited waveforms + clean Freeverb = big improvement for synths projects !
    Emmanuel
  48. Hi Frank, Yes it has been asked hundred times......

    Hi Frank,
    Yes it has been asked hundred times... but the threads often end with no solution.
    I found this :
    ...
  49. playSdWav object pitch shifting possible ?

    Hello,

    Is it possible to change the pitch of the playSdWav (or playFlashRaw) object ? The idea would be to change the speed at which the audio samples are read, but I doubt it is as simple as...
  50. Thank you very much MarkT. I am going to redo my...

    Thank you very much MarkT.
    I am going to redo my PCB design following your rules.
    Emmanuel
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