HOST MOCK TRACE: milliseconds are injected inputs, not measured latency
5,key=3,physical=PRESS
5,key=3,note=ON
10,key=27,physical=PRESS
10,key=27,note=ON
15,key=27,physical=RELEASE
15,key=27,note=OFF
105,key=3,physical=FAULT_RELEASE
105,key=3,note=OFF
135,key=3,physical=PRESS
135,key=3,note=ON
