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  1. Not really, for that i'd advice using a standard...

    Not really, for that i'd advice using a standard 12 stage mono phaser unit. There is no classic LFO built into the Infinite version.
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    Thanks! Will check it out.

    Thanks! Will check it out.
  3. Shepard/Barberpole infinite phaser for Teensy4

    I always wanted to build that thing, to this dayi have a huge number of LM13700 OTAs laying around, bought with plan to make a Shepard/Barberpole phaser. Finally did it, but on Teensy 4.
    It is an...
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    Well, after designing a board that has: 14...

    Well, after designing a board that has:


    14 pots
    1 encoder
    small 0.96" IPS display
    3 footswitches
    optional hardware midi on Serial2
    I2C + SPI expander headers
    expression pedal input
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    Shimmer requires a pitch shifter somewhere inside...

    Shimmer requires a pitch shifter somewhere inside the reverb tank. That'll need more time to implement. At some point i'm going to add it, esp, since i've built myself a new hardware platform for...
  6. Thread: Jaws-fx

    by Pio
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    Jaws-fx

    JAWS-FX - Teensy 4.0 based concept art guitar pedal


    https://www.youtube.com/watch?v=_kUOpjCtoa0

    Story:
    This device was a part of two component birthday gift for a seasoned Jaws movie fan....
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    To change the reverb time you could alter the...

    To change the reverb time you could alter the rv_time_k_max parameter (max reverb time coeff)m which is used in the size function:



    void size(float n)
    {
    n = constrain(n, 0.0f,...
  8. What i find extremely useful in Platformio: 1....

    What i find extremely useful in Platformio:
    1. local to the project libraries placed in the /lib folder. Compiler will look into this folder first and if an included library is not found, only then...
  9. L+ and L- is the left differential input....

    L+ and L- is the left differential input.
    Connect it this way:
    L- -> GND
    L+ -> Teensy Line out L
    R- -> GND
    R+ -> Teensy Line out R
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    12 stage Phaser effect

    Coded something new during last weekend, another classic effect which sounds great with many instruments:

    12 stage mono phaser with internal (built in) LFO or an external modulation input

    23805...
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    Thanks for the explanation Paul. I have fixed...

    Thanks for the explanation Paul.
    I have fixed the code using the __disable/__enable macros. Also changed all the float constants to use "f" postfix to ensure they are single precision floats.

    And...
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    I might be wrong with my assumptions, but the...

    I might be wrong with my assumptions, but the thinking behind this was:
    __disable_irq() disables all interrupts, everything including USB, timers etc.
    AudioNoInterrupts(); disables the software...
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    Could be one of the reasons: if you are using...

    Could be one of the reasons:
    if you are using the Teensy4.0 without the usb cable plugged in make sure there is no

    while(!Serial);
    in your setup function, right after the Serial.begin(); Use a...
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    I'd leave the attn as it is. It is used to...

    I'd leave the attn as it is. It is used to attenuate the input signal depending on the reverb time, creates more attenuation for long reverb tail to avoid clipping.
    The n calculation looks fine....
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    M4ngu make sure both of the files,...

    M4ngu
    make sure both of the files, effect_platervbstereo.h and effect_platervbstereo.cpp are in the same directory as your main file.
    And of course, there header is included properly:

    #include...
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    What i usually do for clean pot readings is: 1....

    What i usually do for clean pot readings is:
    1. Proper supply decoupling. All pots and AVREF are decoupled with an LC filter 10uH + 1u.
    2. 100n filter caps placed close to the analog inputs for...
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    The difference between the hidamp and lowpass is:...

    The difference between the hidamp and lowpass is:
    - hidamp is a lowpass filter placed inside the reverb tank, causing an increasing treble loss as the reverb tail fades out,
    - lowpass is a static...
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    Jay, that's a nice sample, thanks for posting. ...

    Jay, that's a nice sample, thanks for posting.
    I noticed i should maybe reverse the "lowpass" operation. Right now the parameter controls the cutoff frequency, so lower settings give more darker...
  19. Thread: freeverb noise ?

    by Pio
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    Posted a new thread about the reverb:...

    Posted a new thread about the reverb:
    https://forum.pjrc.com/threads/65688-Stereo-Plate-Reverb-for-Teensy4-x
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    Stereo Plate Reverb for Teensy4.x

    Here is something i have been working recently and already used it in a few projects:
    a new implementation of a plate type reverb sound for Teensy4.X.
    It's an allpass based reverb using two LFOs...
  21. Thread: freeverb noise ?

    by Pio
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    I was going to add CPU load measurements but...

    I was going to add CPU load measurements but managed to fry the codec chip. Center negative 9V barrel jacks are dangerous with their exposed +9V ring. Must have touched something that instantly fried...
  22. Thread: freeverb noise ?

    by Pio
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    I have been working on a new reverb...

    I have been working on a new reverb implementation on the Teensy4.0 recently. The algorithm is inspired by the Alesis allpass based reverbs, a fully stereo in-stereo out, using internal lfos to...
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    Just a few thoughts about using PSRAMs after...

    Just a few thoughts about using PSRAMs after struggling with them in my projects. Maybe they will be helpful in some way.
    Although from the outside these chips invite to use them as a regular serial...
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    Here it is. Just comment/uncomment the #defines...

    Here it is. Just comment/uncomment the #defines to start a test for zero time or a quick reverse sweep test.
    It is just a tonesweep connected to both DACs on the codec chip. The loop tests if...
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    Issues with tonesweep in audio library

    Hello Everyone!
    My first post, and a bug + solution report :)
    I have been working on a Teensy3.1 + Audio board based test signal generator oriented towards building music instruments and various...
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