Gilderfluke&Co Sd-25 Audio Repeaters w/Amplifier User Manual

Page 15

The serial port on a Sd-25 runs at a fixed rate of
9600 baud, n, 8, 1 (unless it is in one of the IR
Modes).

Adapters to attach this port to a PC or Mac are
available from Gilderfluke & Company. It can also be
controlled from a Gilderfluke & Co. Br-SDC/09 (a
null modem cable must be used to flip pins #2 and
#3 when used with a Br-SDC/09).
When the Sd-25 boots or a new MMC/Sd card is
inserted, the Sd-25 will list all the SoundFiles that
are found. When any SoundFile is played, the name
and info about the file are displayed through the se-
rial port (there is approximately one second delay
after a SoundFile starts before this info is dis-
played). As a SoundFile plays, the Sd-25 reports the
number of seconds (in ASCII Hex) into the Sound-
File it is.

Using the Optional Serial Port to Select
and Play SoundFiles:

To select and play a SoundFile through the serial
port, send the Sd-25 an ASCII ʻpʼ character, followed
by a two digit ASCII Hex number of the SoundFile

you want to be played. Example: to play SoundFile
1, send ʻp01ʼ. For SoundFile 25, send ʻp19ʼ.

Using the Optional Serial Port to Adjust
Audio Playback Levels:

This command requires Sd-25 Firmware v1.21 or
later. To set the ʻnormalʼ audio playback level
through the serial port, send the Sd-25 an ASCII
+ʼVʼ character (0x16), followed by a two
digit ASCII Hex number of the level you want to use.
Valid levels are ʼ00ʼ to ʻFFʼ. Example: to set play-
back level to 80h, send ʻ<0x16>ʼ80ʼ.

The volume control through the serial port is highly
logarithmic. Once set, the Sd-25 will scale all the
ʻmuteʼ and ʻduckʼ functions to the value you have set
as the ʻnormalʼ playback level.

Special Orders:

If none of the standard operating modes available
on the Sd-25 meet your needs, we can modify the
existing modes, or put in a new mode to suit your
special needs.

Gilderfluke & Co.• 205 South Flower Street • Burbank, California 91502 • 818/840-9484 • 800/776-5972 • fax 818/840-9485