Zektor Switch Serial Protocol, Version 0.16, 5/13/16
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Overview
The Extended I/O mode
This manual assumes all Zektor switches have been set to the Extended I/O mode.
This mode sets all of our switches to use the same source numbering. This allows writing a single
driver that can be used with multiple switches.
In the Extended I/O mode, all switches use the same mappings for the sources. Setting a zone to a
source that doesn’t exist, (like setting a zone to analog input 17, on a switch with only 16 analog
inputs) will simply mute the zone -- it’s the same as setting the zone to 0.
To use the Extended I/O sources you have set the XIO flag in the ‘XS’ command to one (1) by sending
the following commands:
^XS +32768$
<-
Set the XIO flag to use the extended I/O mappings
^SS 8$
<-
Save all ‘XS’ settings in EEPROM (optional)
The ‘SS’ command will save the settings in EEPROM so that the Extended I/O setting is saved
through a power cycle. Otherwise you will need to send the ‘XS’ command each time you initialize the
switch after applying power.
(See: “‘XS’ Control Settings” on page 52, and “‘SS’ Save Default
Power On Settings” on page 55.)
In the Extended I/O mode, the sources for the analog audio zones are
(see “‘SZ’ Set Zone(s) -- Analog
Audio Switch” on page 41)
:
0
= Disconnect zone from any source.
1-32
= Analog audio from RCA left / right inputs.
33-64
= PCM-stereo audio from Coax inputs (mutes if Dolby5.1 or DTS).
65-80
= PCM-stereo audio from Optical inputs (mutes if Dolby5.1 or DTS).
81-96
= PCM-stereo extracted from HDMI inputs (mutes if Dolby5.1 or DTS).
97-112
= Audio from “audio return” inputs on the HDMI receivers (mutes if Dolby5.1 or
DTS).
113-128
= PCM-stereo extracted from HDMI outputs (mutes if Dolby5.1 or DTS).
Note: Only SPDIF type audio can be extracted from the HDMI video. Only PCM-stereo type audio can
be down-converted to analog audio. You cannot down-convert Dolby5.1 or DTS. You cannot extract,
or down-convert high definition audio like Dolby TrueHD or DTS Master Audio.
The sources for the digital audio zones are
(see “‘DSZ’ Set Zone(s) -- Digital Audio Switch” on
page 45)
:
0
= Disconnect zone from any source.
1-32
= Reserved. Mutes audio, same as switching source ‘0’.
33-64
= PCM-stereo, Dolby5.1 or DTS from Coax inputs.
65-80
= PCM-stereo, Dolby5.1 or DTS from Optical inputs.
81-96
= PCM-stereo, Dolby5.1 or DTS from HDMI inputs.
97-112
= Audio from the inputs on the HDMI receivers.
113-128
= PCM-stereo, Dolby5.1 or DTS from HDMI outputs.
129-144
= PCM-stereo that mirrors the 16 analog outputs of the same audio card.
Note: Only SPDIF type audio can be extracted from the HDMI video. Only PCM-stereo type audio can
be down-converted to analog audio. You cannot down-convert Dolby5.1 or DTS. You cannot extract,
or down-convert high definition audio like Dolby TrueHD or DTS Master Audio.
