Mute Audio, Read - Barco Projector User Manual

Example :
Read the status of mute audio of a projector with address
\x01. Suppose the audio is muted.
Transmit
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
Receive (acknowledge)
Start
Projector address
Command[0]
Command[1]
Checksum
Stop
Receive (answer)
Start
Projector address
Command[0]
Command[1]
Data[0]
Checksum
Stop

mute audio, read

\xfe
\x01
\x21
\x3d
\x5f
\xff
\xfe
\x01
\x00
\x06
\x07
\xff
\xfe
\x01
\x21
\x3d
\x01
\x60
\xff
40