sparkfun WIG-13660 Manual page 12

Along with this improvement is a whole list of status indicators for users:
After SD card is inserted and Tsunami is reset:
µSD card found and formatted correctly: 3 short green blinks, then idle state
Error Codes:
No µSD card: One long blue, then idle state
µSD card format error (card installed but can't read FAT): One long red, one short, then idle
state
Audio hardware initialization error: One short red, repeats forever (continuous fast blinking red)
During normal operation:
System idle state: 1 very short blue (flash) every 3 seconds.
Audio playing: Solid green.
Error Codes:
Stereo wave file is triggered with the mono firmware, or a mono wave file is triggered with the
stereo firmware: 1 long red
Bootloader operation (Updating firmware):
Firmware successfully updated: Solid green
Error Codes: (All bootloader blink codes, except success, repeat forever)
No µSD card: One long blue, repeats (slow blinking blue.)
µSD card format error (card installed but can't read FAT): One long red, one short red, repeats
No firmware hex file found, or incorrect file contents: One long red, two short reds, repeats
Flash write error (hardware error): One short red, repeats (fast blinking red.)
Firmware successfully updated: Solid green.
Breakout Pins
Note: All the trigger, serial control, and button pins operate with 3.3V logic. Do not provide 5V to any of these
pins; it will permanently damage the board. The exception to this are the MIDI pins, which are opto-isolated.
There are a lot of breakout pins on the Qwiic Tsunami. While we won't cover them all, we'll discuss the pins with
major functionality that users would normally interface with.
The RGB status LED on the Qwiic Tsunami. (Click to enlarge)