Using the Serial Port to Select
and Play SoundFiles:
To select and play a SoundFile through the
serial port, send the
Sd-25
an ASCII ‘p’
character (‘p’ is short for ‘play’), followed by
a two digit ASCII Hex number of the
SoundFile you want to be played. Example:
To play SoundFile 1, send ‘p01’. To play
SoundFile 5, send ‘p05’. For SoundFile 25,
send ‘p19’ (the value ’19’ is the hexadecimal
equivalent of the decimal number ’25’).
Using the Serial Port to Adjust
Audio Playback Levels:
To set the ‘normal’ audio playback level for
the Sd card through the serial port, send the
Sd-25
an ASCII <Control>+’V’ character
(0x16), followed by a two digit ASCII
hexadecimal number of the level you want to
use. Valid levels are ’00’ to ‘FF’. Example: to
s e t p l a y b a c k l e v e l t o 0 x 8 0 , s e n d
‘<0x16>’,’80’.
You do this by holding down the <control>
key and then pressing the letter ‘v’. Release
the <control> key and press ‘8’ and then ‘0’
to send the value for the audio level.
The volume control through the serial port is
highly logarithmic. Once set, the
Sd-25
will
scale all the ‘mute’ and ‘duck’ functions to
the value you have set as the ‘normal’
playback level. Serial and DMX-512 volume
commands are not saved to non-volatile
memory.
InfraRed (IR) Port:
An IR port is built
into every
Sd-25
.
You can see the
window on the left
side of the case for
the IR sensor.
On the earlier versions of the
Sd-25
, the IR port was available
only as an option (part #
). The IR
receiver was used solely in one of the two IR
modes (either mode 1A or 1B) to trigger
sounds from an
. On the
Sd-25
it can
also be used with an Apple IR remote control
for triggering, testing and volume control.
Whenever the
Sd-25
receives an IR signal,
the DMX-512 LED will flash.
The IR receiver on the
Sd-25
has a fairly
wide reception angle. In some applications
you may need to ‘snorkel’ the receiver and/or
transmitter to narrow the beam to suit your
application. In outdoor applications you may
need to do this just to keep sunlight from
hitting the sensor directly and temporarily
overwhelming it.
IR Port in Modes 1A or 1B:
These modes are typically used to trigger
sound onboard a train, monorail, hay wagon,
bus, or other vehicle.
These two modes are used with
transmitters. Each
continuous request for a specific SoundFile.
When the IR receiver comes into range of
the
, it will play the requested
SoundFile.
IR Sensor
Window
Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485
Sd-25 w/DMX Manual • page 18 of 40 • © July 21, 2017 • Gilderfluke & Co. • DCM
