Here are Robotworkshop 's instructions on Wav Trigger install:
Typically you would use a short 6-pin cable straight through to connect on the header pins on each. I soldered 6-pin headers to both boards.
Before using it there are several steps and you’ll want a to get one of the USB adapters for updating the firmware on the wav trigger.
These steps just need to be done once to update the wav trigger
- solder 6-pin header to wav trigger
- download v1.30 firmware and update utility
- set the slide switch on the wav trigger to the load position
- connect your desktop computer to the wav trigger using a usb cable and the adapter to the 6-pin header you installed above
- connect an external power supply to the wav trigger
- run the wav trigger flash utility.
Once the new firmware is on the wav trigger you can disconnect everything.
- you need to solder bridge two pads to allow the wav trigger to be powered through the 6-pin connection so it will get power from the RoyGBev board. If this is done earlier you may it need the extra power adapter to program the new firmware but it’s safer for dedicated power for that part.
All the actual sound files are stored on a microSD card and plugged into the wav trigger. You load the files using your computer and copy to that card.
- get a microSD card 2gb or larger and just copy all the sound files to the root directory on the card.
From the docs the only part that matters is the first three digits as it used that to identify what sound number to play. The rest of the name is more like a comment and is ignored.
After that just plug the wav trigger in with the 6-pin cable and the audio jack