I am trying to use the wav trigger with an arduino and I download and install both the WAV Arduino Trigger Serial Library and the AltSoftSerial library.
When I load the AltSoftSerial example code and compile, it gives me no error message and everything is working fine.
When I load the Wav Trigger Basic code example I'm getting the following error (see attached file)

How can I fix it and make it work?
Thanks you very much