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  1. oscillator with phase modulation + frequency modulation

    Hello,

    I have already post similar question but the previous thread is old, so I start a new one.

    I have made a synth with a T4.0. This synth uses Frequency Modulation to generate interesting...
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    Hello, I have been using your code and it is...

    Hello,
    I have been using your code and it is working.
    I tried to use it with band limited waveforms, but unfortunately it doesn't work with it. I have been digging the code, but I am stuck. Would...
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    used Teensy for workshops ?

    Hello,

    I am looking for used Teensy for children workshop.
    I am building small synths with teenagers (https://youtu.be/RrDzcaljXUk). I am doing this as volunteer for a non-profit.
    I am looking...
  4. It works. I have used a UDA 1334 DAC. This is...

    It works.

    I have used a UDA 1334 DAC. This is perfect for line output. It is also known to be OK for driving headphones (even if it is not designed for it).
  5. Thank you. I think the PCM5102 will be...

    Thank you.

    I think the PCM5102 will be automatically set to slave mode if I connect the System Clock pin (SCL) to ground. I will try that and report.
  6. Thank you Paul. I think I am going to add an...

    Thank you Paul.

    I think I am going to add an i2s DAC (PCM5102) to get a proper line output.
    Do you think I can share the same i2s wires for both the i2s amp and i2s DAC (BCLK, LRCLK, DIN) ?
    ...
  7. Hi, I have updated my synth a little. Minor...

    Hi,

    I have updated my synth a little. Minor bugs correction, stability and box design. I have also added a drum kit.
    I have re-draw the MIDI interface to tweak and save the presets.
    A lot of...
  8. max98357 + headphones output + line out

    Hello,

    I have made a small synth powered with a little i2s classD amp : max98357. This amp is driving a small speaker.

    I am afraid this is not possible with this type of amp, but is there any...
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    Thank you Mark. Frequency modulation sounds OK...

    Thank you Mark.
    Frequency modulation sounds OK up to 20hz. Enough for LFO.
    Amplitude doesn't sound OK, as you mentioned.
    What do you mean by throughput ?

    I use a T4.0.
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    LFOs different approach

    Hello,

    I have build a quite big polyphonic synth with many oscillators, and 3 LFOs. The patch is quite complicated with many cords.
    To simplify the patch and the code, I tried a new approach for...
  11. I2S DAC with ampli + line out + headphone ?

    Hello,

    For various audio projects, I am looking for a "all-in-one DAC" (mono or stereo) :
    - line level output
    - headphone output
    - class D small amp

    Any idea ?

    For now, I use PCM5102 DAC...
  12. Working ! Thank you. Pt8211 was causing error...

    Working !
    Thank you.

    Pt8211 was causing error when compiling, so I have deleted it and it compiles and plays.

    I am now going to understand better how this tool work.
    Emmanuel
  13. Thank you !! I am not a wizard of C++ as you can...

    Thank you !!
    I am not a wizard of C++ as you can see...

    I have seen your enhanced audio design tool. I didn't try it yet, but it seems just amazing. I hope it will be the standard tool soon....
  14. how to declare multiple similar objects ?

    Hello,

    This is probably a stupid question, but I don't know how to declare multiple objects. There must be a way to do this, but I don't know how.
    For instance, I have a MIDI controller with 24...
  15. controller #15 is mapped to filter FC.

    controller #15 is mapped to filter FC.
  16. Here is a simple test code to demonstrate the...

    Here is a simple test code to demonstrate the problem.
    My issue is getting an even filtering "impact" from low to high pitch notes.

    MY guess :
    - less filtering for lower pitch notes.
    - more...
  17. how to track filter frequency with midi note (keyboard tracking) ?

    Hello,

    I try to find the correct formula to map the frequency of a filter with the note played on a keyboard. I first thought that was easy... but I am not happy with what I have tried so far. My...
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    Hey, it's working now !! Big thank you. Your...

    Hey, it's working now !! Big thank you.
    Your code is really helpful. I hope this will be implemented on a new release.
    Emmanuel
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    Thank you Mark.

    Thank you Mark.
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    Lost with Sample and Hold waveform

    Hello,

    I can't figure out how is working Sample and Hold. I want to use a noise object to feed a sample and hold oscillator. But I can see any input with the AudioSynthWaveform object ? So how is...
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    Hello Murdog, I tried your solution. I have...

    Hello Murdog,

    I tried your solution. I have the phase modulation working, but FM modulation doesn't work. I must have done something wrong.
    I have made a very simple sketch with a LFO modulating...
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    I think think reverb should be merged within the...

    I think think reverb should be merged within the audio lib. It is a major contribution !
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    Wow!! A big Thank you ! I think your...

    Wow!! A big Thank you !
    I think your contribution will help many people who like playing FM synthesis.
    Thanks again
    Emmanuel
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    Thank you for this code. But I can't figure out...

    Thank you for this code. But I can't figure out how to implement it. Do I need to replace synth_waveform.ccp file in Teensyduino ?
    Do I need also to make some changes to synth_waveform.h file ?...
  25. Murdog, would you please give me a few...

    Murdog, would you please give me a few explanations with the way to use Waveformodulated2 ?
    Do I have to simply replace and rename the original class with yours ?
    I rarely dig in theses directions...
  26. Thank you very much Murdog ! Here is the thread...

    Thank you very much Murdog !
    Here is the thread for those who want to try : https://forum.pjrc.com/threads/68650-FM-synthesis-unpredictable
  27. phase modulation + frequency modulation at the same time

    Hello,

    I have build a synth with FM synthesis. I learned on this forum that FM synthesis was actually Phase Modulation. And indeed using phase modulation produces very consistant and musical...
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    lfo phase reset

    Hello,

    I try to reset the phase of an LFO to zero each time a note is played. It has no effect. I think I misunderstand to use of phase().

    lfo.phase(0); //reset LFO phase
    ...
  29. 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...
  32. 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
  33. 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... ...
  34. 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 ?...
  44. 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...
  47. 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.
  48. 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...
  49. 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...
  50. 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.
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