Lost with Sample and Hold waveform

[emmanuel63]

Hello,

I can't figure out how is working Sample and Hold. I want to use a noise object to feed a sample and hold oscillator. But I can see any input with the AudioSynthWaveform object ? So how is it possible to sample and hold noise or a sine for instance ?
I am lost...

I tried the following sketch. It is working but I can't explain why, because there is no input...

Emmanuel

#include <Audio.h>


// GUItool: begin automatically generated code
AudioSynthWaveform       Sample_and_hold;      //xy=213,222
AudioSynthWaveformModulated waveformMod1;   //xy=444.28571224212646,229.00000095367432
AudioOutputI2S           i2s1;           //xy=624.2857055664062,230
AudioConnection          patchCord1(Sample_and_hold, 0, waveformMod1, 0);
AudioConnection          patchCord2(waveformMod1, 0, i2s1, 0);
AudioConnection          patchCord3(waveformMod1, 0, i2s1, 1);
AudioControlSGTL5000     sgtl5000_1;     //xy=231,122
// GUItool: end automatically generated code



void setup() {
  AudioMemory(12);
  Sample_and_hold.begin(0.2, 5, WAVEFORM_SAMPLE_HOLD);
  waveformMod1.begin(0.3, 200, WAVEFORM_SINE);
}

void loop() {
}

 

[MarkT]

The AudioSynthWaveform only does random sample and hold. It doesn't take an input.

The AudioEffectBitcrusher class has a sampleRate() method which might be more what you want.

 

[emmanuel63]

Thank you Mark.