Cannot get setIndex to work

[jrussell05]

Hello and thank you very much for this great library. I'm having difficulty getting setIndex or setPath to work as expected. It's no doubt due to some improper implementation on my part, but I've gone through many of the examples and discussions and have reached in impasse.

I'm trying to use an ESP32 with an SD card and HiLetgo PCM5102 DAC to create a programmable car horn. I have a set of 4 buttons (red, green, yellow, blue) that will play an MP3 horn sound when pressed. I also have different folders on the SD card, each with four MP3 files. Thus, the user can also use up/down buttons to choose a different folder with four different horn sounds which will then be assigned to the four colored buttons.

I've gotten the sounds to play and I can change folder paths. However, no matter what button gets pressed, it always plays the first file in the folder. Here's the function that changes the index and calls the player.begin():

void play(uint8_t index) {
//    std::string path = folders[page-1];
//    path.append("/");
//    path.append(files[index]);
//    player.setPath(path.c_str());
    player.setIndex(index);
    player.begin();
    player.setAutoNext(false);
}

This set of functions looks for button presses and calls the play(index) function:

//  Button Actions
void redAction(Button2 &btn) {
    displayText("Red button pressed", true);
    play(0);
    displayText(title, false);
}
void yellowAction(Button2 &btn) {
    displayText("Yellow button pressed", true);
    play(1);
    displayText(title, false);
}
void greenAction(Button2 &btn) {
    displayText("Green button pressed", true);
    play(2);
    displayText(title, false);
}
void blueAction(Button2 &btn) {
    displayText("Blue button pressed", true);
    play(3);
    displayText(title, false);  
}

Again, no matter which button is pressed, the first file (index 0) gets played. Here's the output of the logs:

This just in ... y
[I] AudioPlayer.h : 525 - void audio_tools::AudioPlayer::writeEnd()
[I] AudioSourceSD.h : 68 - selectStream: 1
[I] AudioSourceSD.h : 72 - Using file /Car_Horns_2/Dixie-horn-sound_01.mp3
[I] AudioEncoded.h : 362 - virtual void audio_tools::EncodedAudioOutput::end()
[I] MetaDataID3.h : 575 - virtual void audio_tools::MetaDataID3::end()
[I] AudioPlayer.h : 211 - reset codec
[I] MetaDataID3.h : 569 - virtual void audio_tools::MetaDataID3::begin()
[I] StreamCopy.h : 74 - buffer_size=1024
[I] MetaDataID3.h : 569 - virtual void audio_tools::MetaDataID3::begin()
[I] AudioSourceSD.h : 68 - selectStream: 0
[I] AudioSourceSD.h : 72 - Using file /Car_Horns_2/CaddyShack.mp3
[I] StreamCopy.h : 74 - buffer_size=1024
[I] MetaDataID3.h : 513 - callback TIT2
==> Title: Caddy Shack
I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] AudioPlayer.h : 249 - sample_rate: 44100
[I] AudioPlayer.h : 250 - bits_per_sample: 16
[I] AudioPlayer.h : 251 - channels: 2
[I] AudioTypes.h : 88 - sample_rate: 44100
[I] AudioTypes.h : 89 - channels: 2
[I] AudioTypes.h : 90 - bits_per_sample: 16
[I] I2SStream.h : 74 - virtual void audio_tools::I2SStream::setAudioInfo(audio_tools::AudioInfo)
[I] AudioTypes.h : 88 - sample_rate: 44100
[I] AudioTypes.h : 89 - channels: 2
[I] AudioTypes.h : 90 - bits_per_sample: 16
[I] Fade.h : 111 - fade in 1152 frames from volume 0.000000
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops

As you can see, it seems to initially select stream 1, but then ends up playing stream 0. You can also see that I've tried using the setPath() function (commented out), but with the same results. What am I missing?

Thanks in advance!

[pschatzmann]

I suggest that you have a look at the begin method of the AudioPlayer in the class documentation. Then you should be able to figure out yourself what's happening!