These test files contain -10dBFS 1kHz tone on the left channel and 100Hz tone on the right channel. Various formats are available to verify wav header processing. The '.ac3.wav' can be used to verify that the -am824 switch can create compliant AM824/SMPTE 2110-31 stream with Dolby Digital (AC-3) content. This was created with a professional Dolby Digital encoder (not available) and SMPTE 337 wrapping tool (available at Dolby's github repository).
