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  • i2sflew's Avatar
    01-30-2021, 01:34 PM
    Thank you for setting this up, so far I couldn't write something like this for my own. Your code does show this works. This is pretty much what my main program is doing except with a lot of MIDI and Serial settings and...
    6 replies | 344 view(s)
  • i2sflew's Avatar
    01-30-2021, 10:27 AM
    Sorry I have very little time to work on my project, so I'll try to setup another program which reproduces the problem when I have time. I'll try with a better description: I can alter the mixer gain by serial...
    6 replies | 344 view(s)
  • i2sflew's Avatar
    01-29-2021, 05:55 PM
    Hi everyone, above you see my basic setup. I am trying to regulate amplitude by the mixer gain setting instead of the oscillators. However if the envelope has already started and the gain was 0.0 at the start and...
    6 replies | 344 view(s)
  • i2sflew's Avatar
    01-18-2021, 04:57 PM
    In that case I might be better and cheaper off to order the audio shield. I wanted to save some money by using the class D I already have and maybe learn something about audio op amps on the way. I used PSpice...
    13 replies | 483 view(s)
  • i2sflew's Avatar
    01-17-2021, 03:50 PM
    I was hoping that would take care of itself with the opamps relatively low BW.
    13 replies | 483 view(s)
  • i2sflew's Avatar
    01-17-2021, 12:57 PM
    The above hints already helped a lot! I altered the schematic this way for the first stage: The noise has gotten less and as long as the input amplitude is attenuated enough there is no distortion. I will make the...
    13 replies | 483 view(s)
  • i2sflew's Avatar
    01-17-2021, 09:06 AM
    Ok, so my main two objectives with this are: 1. convert the differential MAX98357A output to single ended, to drive either headphones, or an external amplifier by AUX. 2. boost the low frequencies a bit I...
    13 replies | 483 view(s)
  • i2sflew's Avatar
    01-16-2021, 03:45 PM
    Hi everyone, I am trying to build a Line-Out from my Teensy Synth. Since I am using a MAX98357A module for audio output, I can't use that to connect it to an external amp or line-in on a pc. I bought a couple of...
    13 replies | 483 view(s)
  • i2sflew's Avatar
    01-07-2021, 06:54 PM
    Thanks, some very nice info in this thread. I'll see if I can make it work, and at least get some better low freq response than this old bluetooth speaker.
    14 replies | 398 view(s)
  • i2sflew's Avatar
    01-07-2021, 06:36 PM
    Haha well I think we have gone from one extreme to the other now. I guess I'd like to settle in the middle somewhere. I want to build a synthesizer some time, with a full range of keys and about the same dimensions of...
    14 replies | 398 view(s)
  • i2sflew's Avatar
    01-07-2021, 06:17 PM
    Never heard about that, that's a freaky concept! But I'd also like to have the pure sine waves come out in the end and get rid of those pesky overtones. Oh so for proper bass I need to match the sorroundings as...
    14 replies | 398 view(s)
  • i2sflew's Avatar
    01-07-2021, 06:03 PM
    @Paul sounds affordable, but still 80€ is not an investment I'd make any day. Something to consider for a future synthesizer project, which might have more oomph! @jonr I'm thinking about adding a Line-Out which...
    14 replies | 398 view(s)
  • i2sflew's Avatar
    01-07-2021, 04:12 PM
    Yeah the speaker is about 2". Maybe for this project I'll stick to converting the differential output to single-ended then and stick to my normal standing amp, although that's not made for very low frequencies either....
    14 replies | 398 view(s)
  • i2sflew's Avatar
    01-06-2021, 05:35 PM
    Hi everyone, I am building a synthesizer with the Teensy 4.0 and the audio library. So far this has been delightfully accessible and I am liking the results. I ordered a MAX98357A Class D Amp to test the sound with...
    14 replies | 398 view(s)
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Audio Library Mixer Gain bug? 01-30-2021 01:34 PM
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