Help with reading from a Teensy3.5 microSD card

Phil144472 · 23 November 2020 15:47

I recently purchased a Teensy 3.5 from Core Electronics and have been unable to find any working example code to read from the micro-SD card and play a .wav file. I do not intend to use the audio board, instead i wish to read directly from the micro-SD card on the teensy and output the music to a small amplifier circuit I made previously for another project.

Bryce · 24 November 2020 00:27

Hi Phil,

Welcome to the forum!

I found a public repo on GitHub for this application by Paul, if you follow the comment editing to match option 3, you should be able to use this .ino for what you’re after.

//   3: Analog DAC - Connect the DAC pin to an amplified speaker
//         http://www.pjrc.com/teensy/gui/?info=AudioOutputAnalog

github.com

PaulStoffregen/Audio/blob/master/examples/WavFilePlayer/WavFilePlayer.ino

// Simple WAV file player example
//
// Three types of output may be used, by configuring the code below.
//
//   1: Digital I2S - Normally used with the audio shield:
//         http://www.pjrc.com/store/teensy3_audio.html
//
//   2: Digital S/PDIF - Connect pin 22 to a S/PDIF transmitter
//         https://www.oshpark.com/shared_projects/KcDBKHta
//
//   3: Analog DAC - Connect the DAC pin to an amplified speaker
//         http://www.pjrc.com/teensy/gui/?info=AudioOutputAnalog
//
// To configure the output type, first uncomment one of the three
// output objects.  If not using the audio shield, comment out
// the sgtl5000_1 lines in setup(), so it does not wait forever
// trying to configure the SGTL5000 codec chip.
//
// The SD card may connect to different pins, depending on the
// hardware you are using.  Uncomment or configure the SD card

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Please let us know if you run into any other issues with the Teensy.

Phil144472 · 5 December 2020 11:26

Thanks for your help, the program works and I can output the audio to an amplifier and speaker.

Bryce · 16 December 2020 02:08

You’re welcome Phil,

Make sure to let us know if there’s anything else that you need, have a Merry Christmas!

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Help with reading from a Teensy3.5 microSD card

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