I've recently assembled the PT8211 audio kit (thanks PJRC for developing this great kit!).
However I'm testing the playback in comparison to the SGTL5000 and I'm getting some very noticeable distortion with the PT8211 kit.
Has anyone else experienced this issue?
I'm using the test sine code from https://github.com/PaulStoffregen/A...les/HardwareTesting/PT8211Sine/PT8211Sine.ino
Here's the oscilloscope reading with jagged sine waves (in light blue):
However I'm testing the playback in comparison to the SGTL5000 and I'm getting some very noticeable distortion with the PT8211 kit.
Has anyone else experienced this issue?
I'm using the test sine code from https://github.com/PaulStoffregen/A...les/HardwareTesting/PT8211Sine/PT8211Sine.ino
Code:
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
// GUItool: begin automatically generated code
AudioSynthWaveform waveform1; //xy=110,75
AudioOutputPT8211 pt8211_1; //xy=303,78
AudioConnection patchCord1(waveform1, 0, pt8211_1, 0);
AudioConnection patchCord2(waveform1, 0, pt8211_1, 1);
// GUItool: end automatically generated code
void setup() {
AudioMemory(15);
waveform1.begin(WAVEFORM_SINE);
waveform1.frequency(440);
waveform1.amplitude(0.99);
}
void loop() {
}
Here's the oscilloscope reading with jagged sine waves (in light blue):
Last edited: