4 ms·

Nice! I guess I'm just bad at judging what's PDM and what's not. :-)

• iamflimflam1 3y ago
  I think there are all sorts of modulation schemes that can be used to generate a PDM like signal. The good ones do a lot of clever things to do noise shaping and make sure it's all up the high frequencies so gets filtered out.
• dekhn 3y ago
  Maybe I'm abnormal but I could look at the bitstream above and pretty much see that it was a falling line, although I couldn't tell it was roughly straight (I assumed it was a sine).
  • phkahler 3y ago
    It's sine-ish. It's (1-x^2)^2 with x from -1 to 1.