Owner`s manual

Each bit in gzd corresponds to one of eight zones, with bit-0 (LSB) being the lowest zone, and the bit-7 (MSB)
being the highest zone. If the bit is 1, the zone is included in the group, and if the bit is 0, it is excluded.
The first zone (selected by bit-0) is defined as group-base-zone gbz. The next seven bits in gzd correspond to the
next seven zones above gbz. For example, if gbz = 9 and gzd = 155, the group includes zones 9, 10, 12, 13, and 16.
First, choose gbz, then to select the appropriate gzd, you need to set the gzd bits corresponding to the desired zones.
Zone gzd-bit bit-value 1=included add bit-values
9 = gbz bit-0 1 1 (lsb) 1
10 bit-1 2 1 2
11 bit-2 4 0 0
12 bit-3 8 1 8
13 bit-4 16 1 16
14 bit-5 32 0 0
15 bit-6 64 0 0
16 bit-7 128 1 (msb) 128
= 10011011 = 155 = gzd
Therefore, when we choose gbz = 9, and set the appropriate bits in gzd to include zones 9, 10, 12, 13, and 16 in
the group, we need gzd = 155. You can get this gzd either by converting the binary value 10011011 to decimal,
or by adding the bit-values that correspond to the included zones (128+16+8+2+1 = 155).
For testing clusters, use the group route/volume commands but set gbz to cluster 1 to 8, and gzd to 0.
Note 8 – Percent-Volume-Range command (*PW,20)
See the Volume/Bass/Treble/Mute Command section for the Percent-Volume (*CW,21/22) commands, which are used to
adjust a zone's volume using a percentage (0 to 100) level instead of an absolute (0 to 35) level. The message returned is also
in percent, which is handy for updating a readout or bar-graph display, without the need for additional calculations.
The *PW,20 command is used to program the Percent-Volume-Range. The factory setting sets the 0-to-100 percent range to
operates on the full absolute volume range of -80 to +6 dB (0 to 35), but you may define a smaller range. For example, the
Percent-Volume-Range can be set to -40 to 0 dB (12 to 32), by issuing an *PW,20,1,12,32 command – this example prevents
the lower part of the percentage adjustment from being barely audible, by setting the 0% point at -40 dB, and sets the 100%
point at the passthrough level of 0-dB. Note that the Percent-Volume-Range is used for all zones on the switcher. Note also,
that each zone has programmable Min/Max-Volume levels (as configured by the *PW,10 cmd) – the zone min/max levels will
overide the Percent-Volume-Range, should they be set to more restrictive levels.
Note 9 – Source Trim Leveling command (*PW,22/23)
A source may be attenuated up to 20-dB, if needed, so all sources sound at a similar volume when switching.
ast attenuation ast attenuation
0 0 dB 7 -14 dB
1 -2 dB 8 -16 dB
2 -4 dB 9 -18 dB
3 -6 dB 10 -20 dB
4 -8 dB
5 -10 dB 240 vol-down = ast+1
6 -12 dB 241 vol-up = ast-1
Note 10 – Zone-Setup command (*PW,40):
These Setup commands are handy for configuring zones, and are identical to the setup commands available using the RC-16
remote control (shift-pause-#, where # is the sid digit). The zone must be on and not muted to use these commands
sid = 1 Set Zone-Initial-Volumes to current left/right levels
sid = 2 Set Zone-Mute-Volume to current (left) level
sid = 3 Set Zone-Min-Volume to current (left) level
sid = 4 Set Zone-Max-Volume to current (left) level
sid = 5 Set Previous-Volume-Flag Off (zone turns on with programmed Initial-Volume level) (normal)
sid = 6 Set Previous-Volume-Flag On (zone turns on at previous level, saved when last turned off)
sid = 7 Set Audio-Mode to Mono
sid = 8 Set Audio-Mode to Stereo (normal)
sid = 9 Restore Zone-Factory-Settings (restored on this one zone only)
Lattis Matrix Switcher 37 Software Version 7.3.0.0