file format specification for wav on sd card

[donnersm]

Description

can't play wav fiels from SD with non specific names

Hardware & Software

Teensy 4.0 with audio shield and 2Gb SD card

Arduino Sketch

Tutorial example 2 sketch: play audio file

Errors or Incorrect Output

No error's but file doesn't seem to open.
file has name: marksd.wav
won't open....but if i rename it to SDTEST1.WAV it will open.
i did change the file name to be opened in the sketch.
anyway...this gives me the impression that files on SD have to have a specific naming convention. like should it start with SD?

[djphazer]

I think in the code, filenames need to be ALL CAPS. The actual files on the SD card can be lowercase, but you have to use uppercase to open them.