Hello !
Here is my project of a "Time Explorer Machine" for a school teacher.
The most difficult things is to export a good sound format. ( here : WAV, mono, 8000Hz - No AD4 ).
The vidéo :
Audio Convertion for WT20SD16 :
Save a sound in WAV 44100Hz
In Audacity : Track -> Mix Stereo Down to Mono
In Audacity : Track -> Resample -> 8000Hz
In Audacity : low left : Project Rate -> 8000Hz
In Audacity : File -> Export as WAV -> 16bit-PCM
SD card format : FAT16 ( SD no HC )
Files names : 0000.wav 0001.wav 0002.wav ... ( At the root of the SD )
Exemple of a WAV file in attachment
The code attached
Excuse my english ...
Machine_Piette_mega_final.ino (12.7 KB)
WtvSD16 Wav Files.zip (220 KB)