Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: tschrama

Search: Search took 0.00 seconds.

  1. Replies
    2
    Views
    69

    or just put a 10R in series to drop a volt or...

    or just put a 10R in series to drop a volt or so....
  2. Replies
    8
    Views
    350

    following :D

    following :D
  3. Replies
    10
    Views
    3,890

    cool project, folowing this thread!

    cool project, folowing this thread!
  4. Just started test my SD card... for reference I...

    Just started test my SD card... for reference I will post my results here:

    Scandisk Ultra micro SDHC(tm) UHS-1 Card with Adaptor
    "A1 for fatser mobile app performance"
    32GB
    "speed up to 98...
  5. Replies
    25
    Views
    1,365

    That would be great.. cannt wait to put my teensy...

    That would be great.. cannt wait to put my teensy 4 into work with an audioboard.
  6. Following this thread... thx for teating the fast...

    Following this thread... thx for teating the fast convolution!
  7. and the analog output of the 3.6 can go beyond...

    and the analog output of the 3.6 can go beyond 1MHz.. for audio thats to much, but for ultrasonic ranging or sonar it might be interesting. Even for extended amplifier testing it might be fun to be...
  8. Linear sweep! Itvs very convinient for...

    Linear sweep! Itvs very convinient for calculating spectra since the energy per unit bandwidth is constant, contrarry to log sweep.
  9. Looking into the .cpp file that is called from...

    Looking into the .cpp file that is called from the library, I see that the output of the CMSIS fft is a UNIT32, but it is squarerooted just before assigning it to the output. If I am not mistaken, if...
  10. Well, I found out through some measurement of raw...

    Well, I found out through some measurement of raw spectra that is putout by the AudioAnalyzeFFT1024 , that it puts out a 16bit value. Now I understand that the ADC uses 16bit data, but why would the...
  11. Here's the Matlab figure I use to visualize the...

    Here's the Matlab figure I use to visualize the octaveband SPL meter. Note the high noisefloor for the high freq bands. The high noisefloor is also present when using a software simulated sine signal...
  12. Got the octaveband SPL meter working usethe...

    Got the octaveband SPL meter working usethe spectrum BIN weigthing factors for each octave band. These BIN weigthing factor BTW, were squared by the OP; they were way off! So I had the sqrt them...
  13. Taken this code and simplified it, made some...

    Taken this code and simplified it, made some changes as the SPL calculation was off.. noise floor is a bit higher than I would expect from 13 bit, but otherwise it works great. Trying to make this...
Results 1 to 13 of 13