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1
2
Time
1
2
Time
1
2
Time
Using the BS2C
Recorder Layout
The BS2C's memory is laid out like a timeline, and the BS2C software can jump
to any absolute position within that line. You can think of it like a piece of tape
laid out in a long strip. It is then divided into eight equal pieces that mark the
start point for any one of eight messages. The BS2C can instantly go to any
one of these eight points. (See the above diagrams). This makes the BS2C
very flexible since you are not limited to 8 one minute messages, but any com-
bination of lengths to use the full 8 minutes. (Depending on sample rate of
course).
Any message can start at any one of these points, but it doesn't have to end at
one. A single message can cross into the next message's area, and keep going
right up to the end of memory. Example two above shows how Messages 1, 2,
3, 7, and 8 are all within their respective segments of memory, but message 4
crosses into 5 and 6. If you were to play message 5, you would start the player
at partway into message 4. Keep in mind you are limited in message length by
its location in respect to the end of memory. Message 1, you can record the full
8 minutes, message 4, only 1/2 of the memory, and message 8, only one min-
ute. So when you are planning on where to store your messages, pick ad-
dresses accordingly!
Adjusting Sample Rate
OK, what is this sampling rate anyway? Sampling rate has a direct relationship
between length of recording and audio quality. The higher the sampling rate,
the better the audio, but we go through memory faster and this results in less
time for recording. The fastest rate is 8kHz resulting in 4 minutes of audio. At
this rate the audio bandwidth is 3.4kHz so the fidelity for voice is good. The
slowest rate is 4kHz, which means we can record lower fidelity audio for a full 8
minutes. The audio is now only good to 1.7kHz, but typically still good quality.
3
4
3
4
3
4
= Used Space
5
6
5
6
5
6
BS2 • 21
7
8
7
8
EOM
7
8
= Unused Space
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