Setup MicroSD Card

The MY1690X works with standard microSD cards up to 32GB capacity and formatted to either FAT16 or FAT32.

Format µSD Card

If you're using a brand new SD card, you may not need to format it though it may come with pre-installed files that could cause performance issues. The Quick Format option in Windows is the usually the simplest method to properly format the µSD card. Otherwise there are many free software options for formatting SD cards available online.

Upload Audio Files

The MY1690X supports both .MP3 and .WAV audio files and acts as a removable USB drive while plugged in over USB-C to directly add audio files to a connected µSD card. In our testing, we found the MY1690X transfer speed is somewhat limited and can take several minutes to upload larger files. If you're moving a large number or large files to use on the Serial MP3 Shield you may want to use a USB SD card reader or plug your SD card into the matching slot on your computer.

File & Folder Naming

The MY1690X requires specific naming conventions for files and folders stored on the SD card. Audio files stored in the root directory must begin with a four digit number (000#) starting at 0001 and can have characters following the numbers. Folders should be named with two digits at the start (0#) and then can have descriptive characters following the numbers. Files stored in these folders must be named starting with three digits (00#) and can have characters after the numbers. Refer to section 6.3 in the datasheet for more information on naming requirements.