Cirrus Logic CobraNet - Manual (Page 93)

CobraNet Programmer’s Reference
Management Interface Variable Reference
DS651PM25
©
Copyright 2006 Cirrus Logic, Inc. 93
Name audioTxChannels
Description
Number of unique audio channels currently being transmitted to the network.
On CS4961xx and CS1810xx this variable always reads 0.
Host Address
0x30003
SNMP Object ID
1.3.6.1.4.1.2680.1.1.5.8
Type Integer
Attributes
Read-only
Default Value
0
Implemented Version
2.8.3.
Name
audioMeterDecay
Description
Decay time constant for audioMeters. Meters have an instantaneous attack time that cannot be
adjusted. This constant can be computed from the desired decay time (t) as:
24-bit platforms: 0x800000
×((1-tan(1/(1500×t)))/(1+tan(1/(1500*t))))
32-bit platforms: 0x80000000 ×((1-tan(1/(1500×t)))/(1+tan(1/(1500*t))))
For reasonably large decay times (>50ms) this can be approximated as:
24-bit platforms: 0x800000
×(((1500×t)-1)/((1500×t)+1))
32-bit platforms: 0x800000 00×(((1500×t)-1)/((1500×t)+1))
Example decay settings:
0 - Instantaneous
8170671 (0x7CACAF) 24-bit, 2091691776 (0x7CACAF00) 32-bit - 50ms
8333053 (0x7F26FD) 24-bit, 2133261568 (0x7F26FD00) 32-bit - 200ms
8377430 (0x7FD456) 24-bit, 2144622080 (0x7FD45600) 32-bit - 1 second
8388235 (0x7FFE86) 24-bit, 2147388160 (0x7FFE8600) 32-bit - 30 seconds
Host Address 0x30100
SNMP Object ID
1.3.6.1.4.1.2680.1.1.5.5
Type
Integer
Attributes
Read/write - Persistent
Default Value
0
Implemented Version 2.6.9