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  1. I know you wrote that you disconnected the supply...

    I know you wrote that you disconnected the supply to the leds. Are you sure? I had a lot of nasty noise from those LEDS influencing other signals nearby. Ended up with a 2200uF cap on the 5V supply...
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    I am running my code on Teensy yes. At the moment...

    I am running my code on Teensy yes. At the moment I am working on the HW on my project, but I will investigate this further when I get to the programming again and publish the results here.
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    Seems like this is dithering? As dithering use a...

    Seems like this is dithering? As dithering use a random signal injected into the filter. And the lowest bits are random(the noise floor) it should be about the same. But maybe worth a try to use...
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    Hi, I found out the same a little while...

    Hi,

    I found out the same a little while ago...
    I think it is something called limit cycles. It is present when the input to the filter is very low. The filter itself will make the noise. With...
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    I actually did some measurements on the sgtl5000...

    I actually did some measurements on the sgtl5000 on this topic. It is on my own board, with some circuits in front of the codec. Just to get a wider dynamic input range(for guitars/bass). But the...
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    Did you manage to get it working?

    Did you manage to get it working?
  7. I often use the DC object and multiply it with...

    I often use the DC object and multiply it with the signal. The DC object has the option to set the time the change in value should be gradually changed over.
    amplitude(level, milliseconds);

    But...
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    Good to hear! Would love to see what you can get...

    Good to hear! Would love to see what you can get from this.
    And yes, you should disable the "nintendo" sounds=) And you might want to mix the pitched voice with a bit of the original to get the...
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    Yes... I took out some code to clean it up a...

    Yes... I took out some code to clean it up a little, but I removed too much=)

    Put this array into the code after the ArbWave:


    int16_t DelayWave[256] =...
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    Yes, I used a delay object made by Byron Jacqout...

    Yes, I used a delay object made by Byron Jacqout at Sparkfun. This object has a input for a modulation signal i.e the input determine the length of the delay. And then I feed that input with a...
  11. Yes it is possible. You don't specify what type...

    Yes it is possible. You don't specify what type of display (i2C or SPI) you are going to use. But I have used I2C and connected it to pin 18 and 19. Works fine with the Adafruit_SSD1306 library.
  12. Good to hear that you figured it out=) From...

    Good to hear that you figured it out=)
    From your code I see one important improvement:
    In your void setup() you should disable the HP filter in the codec. It adds some nasty noise..

    ...
  13. sounds very promising yes! To be able to measure...

    sounds very promising yes! To be able to measure the impulse response is the key to any "black box" my teacher used to say=) Will try to play around with your code when I got some spare time... ...
  14. ohh! Thats some nice code=) This gives a lot of...

    ohh! Thats some nice code=) This gives a lot of opportunities indeed! And how does it sound compared to a real tube amp?
  15. Good work! Seems like you did a very good job...

    Good work! Seems like you did a very good job with this. From where did you get the tube data?
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    Thank you both! That works perfectly =)

    Thank you both! That works perfectly =)
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    I have a question... I am trying to extend...

    I have a question...
    I am trying to extend chipaudettes compressor class with an option to add another input and use it as a sidechain compressor. Where one of the inputs are analyzed and the other...
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    I absolutely understand your arguments. I also...

    I absolutely understand your arguments.
    I also like it as clean as possible when it comes to GUI, but it's hard when it comes to stuff like this. Audio Weaver got over 400 blocks, so as long as it...
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    Ok, I drop the first suggestion. My main...

    Ok, I drop the first suggestion. My main programming language is LabView, so I have a tendency to think in wires all over. Maybe too much..
    So the tap tempo thing should be done in the code outside...
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    Thank you @Blackaddr for bringing up these...

    Thank you @Blackaddr for bringing up these topics! Will also influence my next revision of my pedal input board=)
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    Yes I have to read my books too here=P You are...

    Yes I have to read my books too here=P You are right about the open loop gain. I had one zero too much. TI specifies the typical gain to 100V/mV.

    To be honest, I started using the NE5532 many...
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    thanks! Its a 128x64 OLED screen. Nice and easy...

    thanks!
    Its a 128x64 OLED screen. Nice and easy and lights up well. Actually better then what the picture show
    https://www.pjrc.com/teensy/td_libs_SSD1306.html
    And quite cute=)
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    I love the compressor you made chipaudette! I...

    I love the compressor you made chipaudette! I used some of the code in this one:
    9995

    For my use, I didn't needed the Pre gain calculation. Thats up to the user to decide in this case.
    But I...
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    The input impedance of an opamp is dependent of...

    The input impedance of an opamp is dependent of the configuration.
    In a non-inverting configuration the input impedance is defined as: (1+A0*B)*Zi
    Look at this link:...
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    whats the pitch on the teensy 3.6?

    whats the pitch on the teensy 3.6?
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    or this codec from ti:...

    or this codec from ti:
    http://www.ti.com/lit/ds/symlink/lm49352.pdf

    1.27USD if you buy 1k..
    And -46dB to +18=)
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    Nice! Like the microMIDI box! You are...

    Nice! Like the microMIDI box!
    You are absolutely right in that the signals can get very high on many stompboxes. But it seems like some of the major players out there stick to the industry...
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    Don't you want any potmeters or other inputs for...

    Don't you want any potmeters or other inputs for controlling parameters of the effects? Or do you plan to put that on another board?
    Regarding the input levels, I know that there are some active...
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    I'll split it in two and try to sort my...

    I'll split it in two and try to sort my thoughts..

    -The first one: Basically the waveform object in the library with an option to assign an Inputpin that can be used to adjust the tempo by tapping...
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    Thanks Paul, will do that.. One more thing;...

    Thanks Paul, will do that..
    One more thing; could it be an idea to have a block in the audio lib that can be set up to be a i.e tap tempo block. You assign a pin as input and then it handles the...
  31. I have used the neopixels a lot in combination...

    I have used the neopixels a lot in combination with audio. Have used pin 3 and 8 as output for the LEDs. And it works.
    But you should really watch out for noise on the power lines! The best is to...
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    Thanks again. This seems like a good approach to...

    Thanks again. This seems like a good approach to speed up the slow stuff yes..
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    Thanks KurtE! I will try your way. btw, how long...

    Thanks KurtE! I will try your way. btw, how long time takes an analog conversion?
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    I agree that it is not needed to use interrupts...

    I agree that it is not needed to use interrupts on potmeters. But when you want to have an accurate tap tempo it comes in handy. I have up till now made it without interrups, but the accuracy is not...
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    But it didn't.. I put the intToFloat in front of...

    But it didn't.. I put the intToFloat in front of the compressor and the FloatToInt after. But it was only 0 out.. will search more and see if there is another reason=)
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    Really good work Chip! I have tested the...

    Really good work Chip! I have tested the compressor for use with instruments and it works very well!
    But now I'm in need of a level detector (or envelope follower) for the audio signal.
    And you...
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    This depends on how many units you will make.. if...

    This depends on how many units you will make.. if its one, then you should by the audio shield. If its 10. Do the same. If its 100, maybe design your own card based on one of the supported codecs...
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    Cool stuff! and a lot of good work!

    Cool stuff! and a lot of good work!
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    If you post the code of your program it would...

    If you post the code of your program it would help. But if you use a mixer and mix both of them at unity gain, you would probably get some overdrive! Signals will add up and you will hear clipping...
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    How was you pot connected? Whats the max voltage...

    How was you pot connected? Whats the max voltage that could have been on the pins?
    And have you tested a very simple program that just outputs a sine? That can at least give you a hint if there are...
  41. Thanks Paul! I am also looking foreward to do...

    Thanks Paul! I am also looking foreward to do more testing with the 3.6. An order for some boards will soon come=)
  42. Thanks! You are right. It's better to change the...

    Thanks! You are right. It's better to change the Vdda to 3.3V. Will do!
  43. Yes I know that the 3.5 and 3.6 are longer. But I...

    Yes I know that the 3.5 and 3.6 are longer. But I don't use any other extra pins on them than the A12 and A13 that has changed positions. All the other pins have the same positions. You can see those...
  44. You are right in that the input from the...

    You are right in that the input from the instrument is biased to 2.5V. That is used instead of using symmetrical positive and negative supply to the opamp. But if we use this solution we must put the...
  45. The input buffer in front of the codec is unity...

    The input buffer in front of the codec is unity gain high impedance input. I did not put any gain there because you can add gain in the codec or Teensy.
    I have tried to make a good ground scheme...
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    How did you implement the picth shifter? What...

    How did you implement the picth shifter? What kind of algorithm. And is it changing the pitch both up or down?
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    Do you have the code for these functions...

    Do you have the code for these functions available? The ramping of the mixer level is needed!
  48. Yes I have=) Take a look at my site:...

    Yes I have=) Take a look at my site: http://openeffectsproject.com/
    It is still a bit beta.. and I am waiting for an upgraded version right now. Tha major change on the new version is that I use the...
  49. Looks great! Cool stuff you make!!

    Looks great! Cool stuff you make!!
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    If you're still looking for a board for...

    If you're still looking for a board for effects/audio, I have put together a board that I am now starting to sell. The site is still not very good, but it works. Some years ago I made a board I...
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