Hi Nick:
Great news that you're able to get the sample programs up and running. If you start with one of these sample programs as a base, you should be able to easily substitute your own audio in place of the audio that's used in the sample program.
You will need an audio editor like Audition, Audacity, or WavePad. You can use the audio editor to record your voice using a microphone (or your webcam). Once you make a recording, you will need to do some processing to adjust the volume (if you need to) and get the file at the correct sampling rate. (Our sample programs use 12 kHz sampling rate.) Your new file can be saved in the same directory as the sample program. You will need to edit the .EZ file to include your new file. Once that's done, you compile the program and load your .bin file onto the board just like you did with the sample program.
There is some additional info in the
Getting Started Guide