Here’s a link to the WAV Trigger Online User Guide.
If things don’t seem to be working, first review Online User Guide. If you still have problems, here are a few things to check:
1) Make sure your WAV files are named properly (refer to the Online User Guide) and are located in the root directory of the microSD card. When you first power on the WAV Trigger, it will locate and index the files and then blink 3 times to indicate that it found at least one WAV file. One long blink means that it either couldn’t read the card or it didn’t find any WAV files.
2) If there’s no activity on the status LED whatsoever when you power up the WAV Trigger, check the “Load/Run” switch next to the power connector and make sure it’s in the “Run” position.
3) Once you get the 3 blinks, pressing the on-board button should play the lowest numbered track on the microSD card. Confirm this by observing the status LED turning on to indicate a track is playing. You should hear the track through the stereo jack. If you’re using the on-board audio amp and speaker connection, you won’t hear anything unless you have enabled the amp using the init file (refer to the Online User Guide.)
4) If you’ve gotten this far and tracks won’t play, then it’s most likely that your WAV files are not the correct format. The WAV Trigger will only play WAV files formatted as 16-bit, stereo, 44.1kHz, and there can be no meta-data (non-audio data) in the file before the audio data. It seems that many Mac audio applications insert a meta-data chunk prior to the audio, and this will prevent the track from playing. In such cases, simply importing the file and re-exporting with Audacity will likely fix the problem. See this video about converting files from MP3 to WAV Trigger compatible files, but the same process works with non-conforming WAV Files. You can always grab some of the (correctly formatted) WAV files from the download page to see if that’s your problem.
5) If you’re planning to use the on-board amplifier, read this first. Next, please consider using a supply voltage of no more than 9V, preferably less. Playing loud audio with the on-board amp for extended periods can draw a lot of current and the lower the input voltage, the less warm the 5V regulator will get. This is especially important if you’re encasing the WAV Trigger in a small project box. I personally use 6V wall mount adaptors like this. Alternatively, you can power the WAV Trigger with regulated 5V (5Vin) and bypass the on-board regulator completely.