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    You can use PROGMEM to store variables in flash,...

    You can use PROGMEM to store variables in flash, EXTMEM if you have PSRAM installed. There is also another post on the forum regarding loading wavetables from an SD card to memory.



    EXTMEM...
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    Soundfont decoder loop/sample index

    Hello,

    Recently upgraded to a t4.1 and have been converting various opensource soundfonts for use with wavetable object. I came across some very nice CC synth voices with very small memory...
  3. synth looks amazing though! very nice work

    synth looks amazing though! very nice work
  4. regarding aliasing, it is quite a simple thing to...

    regarding aliasing, it is quite a simple thing to sample a waveform at each c note 0 - 8 using a free commercial DAW and vst type synth, clip them in something like audacity, and re-import them using...
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    ty for the reply! I will run some experiments...

    ty for the reply! I will run some experiments using some of the piecewise tanh solutions i have come across and report back. I was quite curious to try using MATLAB to smooth the function into the...
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    frankenlanguage. idk whats worse, garbage syntax...

    frankenlanguage. idk whats worse, garbage syntax or garbage collectors
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    extern? my god c++ is so ugly XD

    extern? my god c++ is so ugly XD
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    if you still have difficulty pls post your code...

    if you still have difficulty pls post your code and I will help correct it
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    https://forum.pjrc.com/threads/58158-Accessing-Aud...

    https://forum.pjrc.com/threads/58158-Accessing-Audio-Objects-from-an-Array
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    So like this: in audio tool you make mixer[1]...

    So like this:

    in audio tool you make mixer[1] mixer[2] mixer[3] mixer[4]

    comment out the auto gui declared mixer[1] mixer[2] mixer[3] mixer[4]

    do not comment out the patchchord connections,...
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    Yes, essentially what you do is use the audio...

    Yes, essentially what you do is use the audio design tool you can just use the bracket notation in the naming scheme to indicate the setup you desire, then in your editor comment out those...
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    You know I was going to suggest a piecewise...

    You know I was going to suggest a piecewise function, out of curiosity how did you derive the lookup table? I was recently looking at this: https://arxiv.org/pdf/1809.09534.pdf researching...
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    Yes, ty. I realized this the other day when I...

    Yes, ty. I realized this the other day when I started working on my wavetable project again. It would be nice to add this info somewhere in the audio tool documentation because it seems a common...
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    I did end up getting this working, stupidly...

    I did end up getting this working, stupidly forgot I had already encountered this error before a few months back.
    Here is the first example working for anyone who might care:



    #include...
  15. Martin Fink has a good tutorial regarding...

    Martin Fink has a good tutorial regarding PolyBLEP algo: http://www.martin-finke.de/blog/articles/audio-plugins-018-polyblep-oscillator/
  16. https://www3.nd.edu/~dthain/courses/cse20211/fall2...

    https://www3.nd.edu/~dthain/courses/cse20211/fall2013/wavfile/
  17. The simplest way would be to construct a...

    The simplest way would be to construct a soundfont using a free program called Polyphone: https://www.polyphone-soundfonts.com/ for each c note provide a sample of a triangle wave which is not...
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    Array handling in the audio tool.

    Is array declaration on the roadmap for audio tool development? It would be of some use for more complicated designs, as currently you can't declare arrays of wavetables and fill that array with...
  19. You can use a bandwidth limited triangle...

    You can use a bandwidth limited triangle wavetable.
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    So it turns out it was the array declaration of...

    So it turns out it was the array declaration of the wavetables, I forgot I had encountered this before. For some reason you can't declare wavetables and then place them into array and set them, you...
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    #include #include #include...

    #include <Audio.h>
    #include <Wire.h>
    #include <SPI.h>
    #include <SD.h>
    #include <SerialFlash.h>
    #include "AKWF_0036_samples.h"

    // GUItool: begin automatically generated code...
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    How I ended up resolving the clicking anomaly was...

    How I ended up resolving the clicking anomaly was simply to write the code as to avoid the fancy clean functions. C++ isn't my native language so I get quickly irritated by its... haha character. I...
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    Yes this is with wavetables only. I was trying...

    Yes this is with wavetables only. I was trying to determine the max # of unisons and wavetable osc sources I could have per voice. 3 osc, with 8 unisons and 10 key polyphony seems quite tenable...
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    I ended up just rewriting the code in the most...

    I ended up just rewriting the code in the most obtuse fashion and it ended up working. If anyone is interested in the results here they are:
    T4 @ 600 Mhz ~ approx 391 voices
    T4 @ 816 Mhz ~ approx...
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    Probably should include a link to the referenced...

    Probably should include a link to the referenced wavetables: https://github.com/FFFFFF12ABB17/Polysynth_Wavetable_AKWF. The wavetables themselves I believe are not the issue. I've also tried...
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    very cool! thanks for sharing

    very cool! thanks for sharing
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    Issue with wavetable sound

    Hey all, I was trying to put together a simple program to test max polyphony of various teensy platforms but I'm getting unexpected results, specifically just clicking noises
    I've included my code,...
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    I don't understand why anyone would pay Arduino...

    I don't understand why anyone would pay Arduino prices for anything; Which is not to downplay the role the brand has had in advancing the interest in and accessibility to the world of...
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    I was just able to place my order no issues

    I was just able to place my order no issues
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    Oh sweet Jesus I can finally order one! Sorry I...

    Oh sweet Jesus I can finally order one! Sorry I haven't read through the thread in it's entirety but which audio shield is appropriate for the 4.1?
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    Looks cool! Out of curiosity have you explored...

    Looks cool! Out of curiosity have you explored using a touchscreen display with little vgl? I've been using one push click rotary encoder and a touchscreen to great effect, minimal wiring just a...
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    https://github.com/FFFFFF12ABB17/Polysynth_Wavetab...

    https://github.com/FFFFFF12ABB17/Polysynth_Wavetable_AKWF/tree/master Here is a working example using the first 127 AKWF wavetables. Simply download the repo, rename to Polysynth_Wavetable_AKWF and...
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    Manatee sorry for the absence! I'll upload my...

    Manatee sorry for the absence! I'll upload my soundfont header files for the adventure kid waveforms sometime today. I've made significant progress regarding wavetable synthesis on the teensy in...
  34. I'm curious. Try underclocking the teensy @ 150...

    I'm curious. Try underclocking the teensy @ 150 and 396. Does the issue persist? You might also check into using littlevgl lib.
    This link pertains to T3.6 but may be relevant to yr issue: ...
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    Very cool. I was just looking at this on the...

    Very cool. I was just looking at this on the ESP32, nice to see it working on the Teensy. Thanks for sharing!
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    Right now I'm just using a program called...

    Right now I'm just using a program called polyphone(https://www.polyphone-soundfonts.com/en/) You can also use Viena(http://www.synthfont.com/Downloads.html) or any soundfont editor, really. There...
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    Yes certainly! I will make the entire akwf...

    Yes certainly! I will make the entire akwf package available as teensy wavetables sometime tonight. I have quite a few single cycles outside of this, but I need to organize them more coherently :)
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    *see below

    *see below
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    Unless your objective is more a midi player using...

    Unless your objective is more a midi player using the midisynth examples polyphonic setup you can just create a bank of effects and use amps and dynamic patching for your individual voices. 8 - 10...
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    www.adventurekid.se/akrt/waveforms/

    www.adventurekid.se/akrt/waveforms/
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    Any interest in sf2 single cycle fonts?

    So I've spent the last few days processing the Adventure Kid Single Cycle collection into sf2 files. If anyone is interested I can upload them for everyone's use. Each waveform uses exactly 4.09kb...
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    Using 64 waveform oscillators in such a fashion...

    Using 64 waveform oscillators in such a fashion doesn't really use much of the teensy resources:

    18915


    #include <Audio.h>
    #include <Wire.h>
    #include <SPI.h>
    #include <SD.h>
    #include...
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    https://forum.pjrc.com/threads/59092-Notes-and-Vol...

    https://forum.pjrc.com/threads/59092-Notes-and-Volts-Synth-tutorial-polyphonic-expansion?highlight=notes+volts here is an example expanding the mono synth from the Notes and Volts tutorial. You can...
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    Why not create an object pool of desired audio...

    Why not create an object pool of desired audio objects? Actually, I'm not sure this approach would make sense in this case. Why don't you figure out the maximal number of oscillators you need and...
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    ah very good point.

    ah very good point.
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    XD More meaning the sound would be shit on an 8...

    XD More meaning the sound would be shit on an 8 bit dac and you'd get truncation errors
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    I suspect this is the case as well. Perhaps a...

    I suspect this is the case as well. Perhaps a simple edit to the description would be helpful. Relatedly, is development of t4 as usb audio out on the dev roadmap?

    [EDIT]

    ah, just saw this: ...
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    Doesn't ESP32 have 2 8 bit DACs? I imagine that...

    Doesn't ESP32 have 2 8 bit DACs? I imagine that would cause some headaches trying to port the library.
  49. Ah so just read up on the transwave - seems very...

    Ah so just read up on the transwave - seems very similar to the wavetable morph function in Serum. I was definitely planning to implement something like this. Currently, I'm working on creating an...
  50. I was just going to paste the code here but...

    I was just going to paste the code here but forking the git does make more sense. Regarding the transwaves, thank you for the suggestion, I will check it out :) And thanks again for your help.
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