Hi Nic. As noted, I'm going to be out of circulation for a while, but is it worth considering merging my changes to your repo, either in the master branch or at least on a separate branch? At one point I think I got pretty divergent, but I did then start trying to get back to something closer to your API, e.g. removing the warnings, and changing the interpolation data stuff ... I can re-address that, can't remember where I left it.
Thanks! This is going to be perfect for my next project. Will let you know once is tested.OK, so quite a bit later than advertised, but I've made some progress. Prior to doing a PR I want to sort out an example showing how to access the SD card while streaming audio from it, and update various bits of documentation, but the current state of things can be found at https://github.com/h4yn0nnym0u5e/teensy-variable-playback/tree/dev/h4y/trunk. I believe it's working from at least SD, LittleFS and in-memory arrays, with variable speed, interpolation, cross-fading and looping all OK.
One new example I've added is a piano player, along the lines of the PlaySynthMusic example, but using 9 stereo samples made at 6-semitone intervals, and then changing the playback rate to shift each one between -3 and +2 semitones to re-create a full 4-octave chromatic capability. At 5-note polyphony it registers just over 9% CPU, though this will be an underestimate as the SD card accesses don't occur inside the audio update.
As ever, if you find an issue, please post complete code I can drop into the Arduino IDE to reproduce it
Thanks for your help,
...followed by a snapshot of your audio configuration ... with all sorts of mystery arrays ... definitely not fulfilling
Yes, the Design Tool documentation isn't what you'd call well-maintained: PWM output is an option for Teensy 4.x. The recommended output hardware is documented in the info pane thus:As ever, if you find an issue, please post complete code I can drop into the Arduino IDE to reproduce it
AudioPlaySdResmp, as mixing those with the stock AudioPlaySdWav may well cause other problems.
playWav1.setLoopType(looptype::looptype_repeat); does not work for me.I tried to use these functions, but didn't have success yet.
typedef enum loop_type {
looptype_none, // 0
looptype_repeat, // 1
looptype_pingpong // 2
} loop_type;float rate = ((float)pow(2, (note - 48) / 12.00)); // sample note C4 440Hz
sample.setPlaybackRate(rate);
sample.setLoopType(looptype_repeat);
channels = 1;
sample.playRaw(Sample->sampledata, Sample->samplesize / 2, channels);Sorry for being "the guy" that provided too little context and still expects help
I did, but it didn't work for me. It's in the arduino sketch.You still need to set the loop_type
#include <Arduino.h>
#include <Audio.h>
#include <SD.h>
#include <TeensyVariablePlayback.h>
// GUItool: begin automatically generated code
AudioPlaySdResmp playSdWav1; //xy=324,457
AudioOutputI2S i2s2; //xy=840.8571472167969,445.5714416503906
AudioConnection patchCord1(playSdWav1, 0, i2s2, 0);
AudioConnection patchCord2(playSdWav1, 0, i2s2, 1);
AudioControlSGTL5000 audioShield;
// GUItool: end automatically generated code
double getPlaybackRate(int16_t analog);
char* _filename = "SPACE.WAV";
void setup() {
Serial.begin(9600);
if (!(SD.begin(10))) {
// stop here if no SD card, but print a message
while (1) {
Serial.println("Unable to access the SD card");
delay(500);
}
}
AudioMemory(24);
audioShield.enable();
audioShield.volume(0.5);
playSdWav1.enableInterpolation(true);
playSdWav1.setPlaybackRate(1.0);
playSdWav1.playWav(_filename);
playSdWav1.setLoopType(looptype_repeat);
}
void loop() {
int newsensorValue = analogRead(A0);
playSdWav1.setPlaybackRate(1.0);
if(!playSdWav1.isPlaying()) {
playSdWav1.playWav(_filename);
}
}
// map analog input 0-1023 to 0.5-3.0 pitch
double getPlaybackRate(int16_t analog) { //analog: 0..1023
return ((analog / 1023) * 2.5) + 0.5;
}I'm sorry, but I'm not sure how to get the length of the files.
setLoopType(), there is still the small audible delay.setUseDualPlaybackHead and setCrossfadeDurationInSamples can be used to achieve this.Oh sorry, it's the 4.0 with a Rev. D audio apapter. Board manager and libraries are all up to date.
#include <Arduino.h>
#include <Audio.h>
#include <SD.h>
#include <TeensyVariablePlayback.h>
// GUItool: begin automatically generated code
AudioPlaySdResmp playSdWav1; //xy=324,457
AudioOutputI2S i2s2; //xy=840.8571472167969,445.5714416503906
AudioConnection patchCord1(playSdWav1, 0, i2s2, 0);
AudioConnection patchCord2(playSdWav1, 0, i2s2, 1);
AudioControlSGTL5000 audioShield;
// GUItool: end automatically generated code
float rate = 1.0; // ((float)pow(2, (Midi_note - 48) / 12.00)); // sample note C4 440Hz
const char *_filename = "SPACE.WAV";
void setup() {
Serial.begin(9600);
if (!(SD.begin(10))) {
// stop here if no SD card, but print a message
while (1) {
Serial.println("Unable to access the SD card");
delay(500);
}
}
AudioMemory(24);
audioShield.enable();
audioShield.volume(0.8);
playSdWav1.enableInterpolation(true);
playSdWav1.setPlaybackRate(rate);
playSdWav1.playWav(_filename);
playSdWav1.setLoopType(looptype_repeat);
}
void loop() {
//int newsensorValue = analogRead(A0);
//playSdWav1.setPlaybackRate(rate);
if(!playSdWav1.isPlaying()) {
playSdWav1.playWav(_filename);
}
}// map analog input 0-1023 to 0.5-3.0 pitch
double getPlaybackRate(int16_t analog) { //analog: 0..1023
return ((analog / 1023) * 2.5) + 0.5;// Midi notes from 0-128
float rate = ((float)pow(2, (note - 48) / 12.00)); // sample note C4 440Hz is middle