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  1. Hi FinleyOderSo, can you throw up your latest...

    Hi FinleyOderSo, can you throw up your latest code with the changes you made, Cheers, Paul
  2. I use following with Teensy 4 which works for me ...

    I use following with Teensy 4 which works for me


    #include <WS2812Serial.h> // leds
    #define USE_WS2812SERIAL // leds
    #include <FastLED.h> // leds
    ...
    FastLED.addLeds<WS2812SERIAL,...
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    First go at a new board using the WM8731 codec as...

    First go at a new board using the WM8731 codec as suggested by @blackaddr, easy to solder and seems to work well, bit more testing to do.

    Used pretty much the application circuit from the...
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    I found these helpful: Grounding and Decoupling:...

    I found these helpful:
    Grounding and Decoupling: Learn Basics
    Staying Well Grounded
  5. Here's a simple modification of the standard...

    Here's a simple modification of the standard mixer with 10 inputs, cheers Paul

    20646
  6. Hi Holger, I don't want to hijack your thread but...

    Hi Holger, I don't want to hijack your thread but could I ask about you stereo > mono effect - are you just summing the channels like the mixer or something else? thank Paul

    PS I agree a...
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    Hi, you might want to check out...

    Hi, you might want to check out https://codeberg.org/dcoredump/TeensyMIDIAudio from user @C0d3man for a few ideas
  8. Hi lokki Good you got a fix. I'm no expert but...

    Hi lokki
    Good you got a fix. I'm no expert but looks like there is an influence from the oscilloscope impedance and your long cables as you've found with the cap but I can't say that I understand...
  9. that's quite a lot of reads a second - could you...

    that's quite a lot of reads a second - could you try 2 millis and see if that helps?
  10. @lokki, have you tried slowing your loop down? ...

    @lokki, have you tried slowing your loop down?

    I use keypad on a mac with a mag cable and on battery with no issues
  11. @alrj can you post some sample code that...

    @alrj can you post some sample code that reproduces your problem, it makes it a lot easier to help that way, cheer Paul
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    @blackaddr I've been looking at your schematic,...

    @blackaddr I've been looking at your schematic, which has been really helpful thanks for sharing it.

    I know your board is focussed towards guitars and has significant attention to that with the...
  13. Tops, thanks

    Tops, thanks
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    @blackaddr thanks for that, I'll look into...

    @blackaddr thanks for that, I'll look into WM8731, I can deal with TSOP so looks promising
    Your board looks great. cheers, Paul
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    As far as I know, the 1.8V supply is for VDDD,...

    As far as I know, the 1.8V supply is for VDDD, text below from the Datasheet, the max for VDDD is 2.0V-

    The SGTL5000 requires 2 external power supplies: VDDA and VDDIO. An optional third external...
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    thanks @boxxofrobots, not sure inside of a 70's...

    thanks @boxxofrobots, not sure inside of a 70's stereo was the look I was going for but thanks for the link to Jessa ;)

    doesn't look like many alternative options so will have a look into heat gun...
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    Audio Board Equivalent for Custom PCB

    I've built a custom effects board with Teensy and AudioBoard which has been great fun but the connection from the Audioboard to inputs and outputs are a bit of a mess.

    I know I could tidy up the...
  18. Hi, You need the Rev D for 4.1 ( from here...

    Hi,

    You need the Rev D for 4.1 ( from here TEENSY4_AUDIO Audio board for use with Teensy 4.0 - 4.1, (Rev D))

    There are other changes in pins between 3.6 and 4.1 so you might have to look at...
  19. I'm fairly sure the neopixels are ws2811s (rather...

    I'm fairly sure the neopixels are ws2811s (rather than ws2812s)

    The OctoWS2811.h lib is another of Paul's non-blocking libs that you can use with FastLED as in #5
  20. try #include #define...

    try
    #include <OctoWS2811.h>
    #define USE_OCTOWS2811
    #include <FastLED.h>

    in that order
  21. Hi, That's good lineOutLevel helps a bit....

    Hi,

    That's good lineOutLevel helps a bit. Couple of additional thoughts:

    Here is the text from the design tool on volume, might not affect you as i think you are using line out only (if so do...
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    beautiful looking custom keyboard and excellent...

    beautiful looking custom keyboard and excellent writeup of the process

    p.s. love T800 arm also :)
  23. @touting, couple of thoughts - do you have any...

    @touting, couple of thoughts
    - do you have any flashy lens (neopixel or ws2812s or anything like that?)
    - are you setting the audio board with any other functions?
    - are you using line out or the...
  24. Your synth looks great, nice work. On your...

    Your synth looks great, nice work.

    On your noise question have a look at this.

    Simply disabling the high pass filter on the audio board seems to help a lot (adcHighPassFilterDisable())
    ...
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    I made a (very) rough and ready AudioBoard using...

    I made a (very) rough and ready AudioBoard using FreeCAD (for the first time!).

    Zip file with the FreeCAD model plus a .wrl that you can use direct in KiCAD
    19948


    A picture of it sitting on...
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    for me there is clickable attachment at #7 with a...

    for me there is clickable attachment at #7 with a zip file with the filter_biquad_f.h, filter_biquad_f.ino and a test sketch - are you looking at it on a phone?
  27. I came across this paper ...

    I came across this paper "Non-Linear Digital Implementation of the Moog Ladder Filter" (Proceedings of DaFX04, University of Napoli) by Antti Huovilainen and found an implementation for Reason JSFX...
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    It's a floating point (rather than integer)...

    It's a floating point (rather than integer) version of the biquad filter - see post #7
  29. Thanks for these, I'd love a good Moog like LP...

    Thanks for these, I'd love a good Moog like LP filter and I had a play about with the sketch.

    I added a pot for cut-off freq and res and a couple of extra waveforms to thicken the sound for...
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    3d CAD Model for Audio Board / Shield

    Hi, has anyone come across a 3d model for the audioboard, looking to use it in KiCad but any 3d MCAD format would be great.
    thanks Paul
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    I agree but I still want more that 24 steps per...

    I agree but I still want more that 24 steps per turn :)
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    The problem I've had with encoders for audio...

    The problem I've had with encoders for audio effects/applications is the lack of resolution with a single turn - with 24 pulses per revolution you need to turn the knob 10 times to get 8 even bit...
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    hi @xtreemechill I'm no expert but a few...

    hi @xtreemechill

    I'm no expert but a few points just from my experience with pots and audio effects:
    - are you using the audioboard as part of your design, if so remember that will take out a...
  34. have you had a look at...

    have you had a look at https://www.pjrc.com/teensy/td_libs_AudioNewObjects.html
  35. Hi, if you upload the code you are using I'll...

    Hi,

    if you upload the code you are using I'll test it on a similar setup

    cheers, Paul
  36. Hi Have a look at @a_guy_called_tom's Polaron...

    Hi

    Have a look at @a_guy_called_tom's Polaron DIY Drum Machine - https://github.com/zueblin/Polaron

    He has created a custom Envelope using an exponential look up table, have a look at the...
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    Hi, I wired up a Teensy 3.2 with the DAC and...

    Hi,

    I wired up a Teensy 3.2 with the DAC and the first two examples above work fine.

    The last one (#5) doesn't work because you've got two connections to the dac (which only has one port) so...
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    @nubie I tried your code with a Teensy 3.6 with...

    @nubie I tried your code with a Teensy 3.6 with the Audioboard. I changed the dac for an i2s output and it works fine (sounds good!).

    I don't have the dac set up for audio out so can't test that,...
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    Try increasing AudioMemory() delay uses lots of...

    Try increasing AudioMemory() delay uses lots of memory.

    From the GUI:
    Memory for the delayed signal is take from the memory pool allocated by AudioMemory(). Each block allows about 2.9...
  40. @iankravets being using PlatformIO for a while...

    @iankravets being using PlatformIO for a while now, just want to say thanks, can't believe I struggled with that Arduino IDE for all that time!
  41. Hi 1) The mixers are fine, you can use two amp...

    Hi

    1) The mixers are fine, you can use two amp objects instead of mixers if you want, it will look neater but it will not really make any difference to performance

    2) Combine does a binary...
  42. @etmoody3 - thanks for the feedback :) on the...

    @etmoody3 - thanks for the feedback :)

    on the error:
    - I'm using const to place the arrays in flash rather than ram. If you have a few of these large arrays of floats they quickly use up ram that...
  43. Hi @flo I've attached the wavetables below,...

    Hi @flo

    I've attached the wavetables below, some notes:
    - I've converted them to 513 samples from the original 2001
    - I've also included a version of one of them at 1025 samples (12ax7)
    - In...
  44. thanks, what version of teensy are you using...

    thanks, what version of teensy are you using (sorry if I've missed it)?
  45. @RABB17 - in a single post could you put all the...

    @RABB17 - in a single post could you put all the code that would allow us to reproduce your issue
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    +1 for KiCAD

    +1 for KiCAD
  47. Tried on a couple of different macOS versions...

    Tried on a couple of different macOS versions with the same issue as you (glitches at AUDIO_SAMPLE BLOCK 64), nothing obvious /easy mades a difference. Block size lower than 64 sounds worse.

    18790
  48. how have you set up/connected the mac and where...

    how have you set up/connected the mac and where are you hearing the distortion (headphone on the audio board or through the mac)
  49. Hi danixdj, I don't have a great amount of...

    Hi danixdj,

    I don't have a great amount of USB experience but I have a mac and have looked out a 3.6 - how have you set up/connected the mac and where are you hearing the distortion (headphone...
  50. Hi Dani, what audio objects are you using? I'm...

    Hi Dani, what audio objects are you using? I'm using a number of different objects with AUDIO_BLOCK_SAMPLES at 16 for the same reason (low latency) and all running well, Cheers Paul
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