Zektor Palladia™ 8X8 - Manual (Page 56)

56 HDA800(V2) Serial Protocol, Version 1.3, 9/12/13
Audio Control
The HDA800(V2) can have their volumes adjusted as a percentage instead of an dB level. This can
make writing drivers easier for many systems.
The VPZ command always uses a setting of 0 to 100, regardless of the minimum volume settings
(“‘VMIZ’ Set Zone’s Minimum Volume” on page 54) and the maximum volume settings (“‘VMAZ’
Set Zone’s Maximum Volume” on page 55).
A value of 0 is always full mute.
A value of 1 is always the minimum volume level.
A value of 100 is always the maximum volume level.
Any value between 1 and 100 will be a percentage between minimum and maximum volume, to the
nearest 0.5dB.
The format is:
^VPZ @ zone,@zone,vol Set the volume of a zone or zones.
^VPZ @ zone,+step$ Add ‘step’ number of 0.5dB steps to current volume.
^VPZ @ zone,-step$ Subtract ‘step’ number of 0.5dB steps from current volume.
^VPZ ?$ In polled mode, reads current settings of all volume changes.
^VPZ @ zone,@zone,?$ Read current volume settings of given zone(s).
Response Strings:
^=VPZ @ zone,vol$
Where:
@ zone = One (or more) zones to be affected.
vol = Volume as a percentage: 0 through 100.
To jump immediately to a new volume, the range is 0 to 100.
To fade to a new level in a given time period the range is 10000 to 10100.
To fade to a new level at a given speed the range is 20000 to 20100.
Using the ‘+’ or ‘-’ modifiers to adjust the current volume level will disable the mute command.
(See“‘VMZ’ Mute a Zone using Volume Control” on page 57.) The current volume level used will
be the value heard by the user (volume - mute attenutation). In other words, when adjusting the volume
using +/- values, the volume will go up or down from the current value being heard by the user, regard-
less of the mute setting. The mute setting will be cancelled (unmuted), but will not have an affect on
the volume level. The VMZ response will be sent to the controller to indicate mute was cancelled,
along with the VPZ response to indicate the new unmuted volume level.
Setting the volume without using the ‘+’ or ‘-’ modifiers will not have an affect on the mute setting.
All the examples given in the set volume command (See “‘VZ’ Set Zone’s Volume” on page 52)
apply for the VPZ command as well. Simply substitute the VPZ for the VZ command and use values
between 0 and 100.
‘VRT’ Set Volume Ramp (Fade) Times
The HDA800(V2) allows the volume to be ramped over time (fading), this command sets the ramp
time and ramp speed used when fading volume. All zones share the same times.
There are two different ways to fade volume.
1 Fade volume over a set period of time.
2 Fade volume at a controlled ramp speed.
The VRT allows setting both of these.