I tested with the FullFunction example and everything works great - except all the read() functions. I don’t think any are returning the right values. The first call returns -1 and all the rest are numbers I can’t interpret - but they are the same every time I run.
I’m using a new SanDisk SD card that came pre-formatted. I have six folders under the root folder - 00, 01, 02, 03, 04, and 05. All the files in the folders start with a unique, sequential, three-digit number. In past implementations I just had all the audio files under an MP3 directory under the root and audio files with four-digit starting numbers, but this time I need to segregate the folders. I don’t think I’ve ever built a project that needed to use any of the read calls. Tomorrow I’ll try reformatting the SD Card, but since all the initialize, setup, and play functions seem to be working this seems like a stretch. I’ll also build up a separate stand-alone hardware testbed and try that too.