Example Of Gains For The Calibration Of Input And Output Signal Levels; Gpios - Digigram ALP442e User Manual

User Manual for ALP442e & ALP442e-MIC
12.3.10 Example of gains for the calibration of input and output
signal levels
Let's consider the first analog input and output.
Gains to be set for recording
Type of gain Numid
Analog input gain 1102
Digital input gain 17
Mixer gain 593
Record digital gain 1
Gains to be set for playback
Type of gain
Play digital gain
Mixer gain
Digital gain on analog output

12.3.11 GPIOs

Reading the status of the GPIs and setting the status of the GPOs can be done through the
Linux libgpio library.
ALP882e & ALP882e-MIC
,
ALP442e & ALP882e
Value for +12dBu = Value for +24
0dBfs dBu = 0dBfs
26
901 901
901 901
901 901
Numid Value for
0 dBfs=+12 dBu
49
65
33
ALP442e-MIC & ALP882e-MIC
Value for -50 dBu
= 0dBfs
2 150
901
901
901
Value for
0dBfs=+24dBu
901
901
781
Value for -30dBu
= 0dBfs
110
901
901
901
901
901
901
57