The audio le format for the MIAS is Windows PCM le format (i.e. .wav les).
The audio must be mono, 16 bit samples at 22.05 KHz sampling. The audio
should be normalized to 100% amplitude to ensure best audio quality when
played back on the MIAS. The SD card MUST be formatted as FAT with a blank
volume name before copying the 'wav' les. This is done by right clicking the
SD drive icon from 'My Computer' and selecting FORMAT.
The audio les on the PC hard disc MUST be named '01.wav', '02.wav' etc. up
to the last le to be copied. There should be no break in the le name
sequence i.e. the name of the last le should be equivalent to the total tracks
to be on the card. There can be a maximum of 8 audio les on the SD card.
You then copy each le in turn from the PC hard disc to the SD card root
directory. Do not put any other les on the SD card (except the ‘MODE.txt’ le
if required – see below).
Copying les to the SD card can take longer than the computer indicates i.e.
the computer will show that copying is nished but there is still data to be
transferred to the card. Please ensure all les have been copied to the SD
card before it is removed. The best way to conrm this is to ‘click’ the ‘Unplug
or Eject Hardware’ button in the ‘System Tray’ icons (bottom right of screen),
and then select ‘STOP xxxxxxxx’ where xxxxxxx represents the SD card drive.
If all the data has been transferred then a message will indicate that you can
remove the card, if not then wait a while and try stopping the device again.
Remember that you should not have‘My Computer’ or ‘Windows Explorer’
accessing the SD card at this time otherwise the computer will assume the
card is in use and will not allow it to be removed.
The programmed card should then be inserted into the MIAS with the label
side down.
By default, all messages are non-interruptible. This can be changed using an
additional ‘Mode’le on the SD card. See the section on ‘Operation with a
MODE le’below for further details.
PROGRAMMING THE SD CARD
The MODE le allows additional options to be programmed, which modify the way
the SBLite responds to the button inputs. This feature is available on SBLites with
rmware version SBLITE1.2 or later. By default, all the messages are non-
interruptible, i.e. once started the message cannot be interrupted by another
message button. However some (or all) messages can be assigned as interruptible
by programming a mode type for the particular message in a text le identied as
‘MODE.txt’. In addition some messages (and consequently button inputs)
can be assigned as randomly selectable. Additional features available with the
MODE le are programmable delays. One from power-on to checking the button
for the rst message; and also a delay between the end of a message and checking
the button to allow a new message to start. These delays are primarily intended to
allow operation with a PIR movement sensor.
The MODE le is a simple text le, which can be created using any simple text
editor on a PC. Alternatively blackbox-av can provide a‘Visual Basic’ programme,
which can assemble the MODE le using a simple ‘click-the-box’ user interface.
Each text line in the MODE le is a command, which sets either a time delay value
or a mode type for a particular message number. If a time delay is required then it
should be entered on the rst and/or second line of the MODE le. The line begins
with the letter ‘D’ followed by either‘X’or ‘Y’ followed by a 3-digit number.
DXzzz = Time from power-on to accepting the 1st button (zzz = seconds) N.B. all 3
digits must be entered e.g. DX030 is 30seconds delay from power-on.
DYzzz = Time from end of message to accepting the next button (zzz = seconds)
N.B. all 3 digits must be entered e.g. DY010 is 10seconds delay between messages.
The command for setting the message mode type begins with‘M’followed by a
number (1-8) representing the message, then ‘=’ then a letter identifying the mode
type for the message. The mode type letter are as follows:
N = Non interruptible
I = Interruptible
R = Random selection Non interruptible
r = random selection Interruptible
P = Play whilst the button is pressed.
OPERATION WITH A ‘MODE’ FILE
For audio encoding support please see:
http://www.blackboxav.co.uk/product-downloads/audio_encoding_guide.zip
