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4407 Digital Audio Sample Rate Converter
Technical Manual 17
set fade - byte 1 : 00l0000D
-
byte 2 : 0SSSSSSS
To start an audio fade this command is sent with the parameters D for up (1) or down
(0) and SSSSSSS for fade rate.
SSSSSSS 00 = fade in 0 seconds
05 = fade in 1 second Notes: These are
0A = fade in 2 seconds approximate times
14 = fade in 4 seconds
28 = fade in 8 seconds
Other values have no effect.
status request
- byte 1 : 00110000
On receiving this command the 4407 will respond by sending 6 bytes of status data
as detailed in the following section.
reset - byte 1 : hex FD
Causes the 4407 card to reset to the power up condition which is fader at the top and
unity gain.
Bytes transmitted
The following data bytes are transmitted by the 4407 after a panel poll from the link
layer has been issued by the controller.
fader gain high - 0001HHHH
fader gain low - 00l0LLLL
Reports the fader gain status. This is not the audio gain setting but a value
corresponding to the fade position at that particular point. These bytes are issued in
response to a status request command given from the controller.
HHHHLLLL
00 = fade has reached bottom position
80 = fade active
FF = fade has reached top position
Note: These bytes are included for compatibility with the CBC 5015 fader protocol.