Wildlife Acoustics sm3bat, Руководство пользователя

Страница: 34 / 86

Programs SM3BAT User Guide
page
28
BIOACOUSTIC MONITORING SYSTEMS
4 Programs
4.1
Introduction
This section describes how to work with programs on the recorder using the LCD
screen main menu and keypad.
The operating behavior of the SM3BAT is controlled by a program file. You can
create and save multiple programs; however, you can only load one active
program at a time on the recorder. You can load one of the built-in programs,
import a program on an SD card, or create and edit your own program using the
recorder or SM3 Configurator software. The program defines the recording
schedule, commands, and all parameters. Out of the box, the SM3BAT does not
have any program loaded and one must be loaded using one of the above
methods.
4.2
Recording File Basics
Song Meter can record in mono using either channel 0 or channel 1, or in stereo
using both channels. Bats can be recorded in full spectrum using standard .wav file
format or compressed .wac file format. By default, compression is turned off and
the audio files are stored as uncompressed .wav files. If you enable compression
to reduce file size, the SM3BAT stores the audio files in the proprietary Wildlife
Acoustics Audio Compression (WAC) file format with a .wac filename extension.
On average, .wac files are 40% smaller than uncompressed .wav files though the
superior noise filtering in triggered .wav mode can still result in lower file size.
NOTE : As memory card capacities expand and prices fall, the value of the
compressed .wac file format decreases. Compression consumes more processing
power. For most wildlife recording projects, we recommend .wav format.
In WAV mode, if either channel is recording, either because of a triggered
recording or a continuous recording, the other channel will be forced to record as
well. Therefore, it is not wise to record continuously (untriggered) on one channel
and triggered on the other in WAV mode, as effectively the triggered side will also
record continuously. If the desired behavior is to record continuously on one
channel and only during a trigger on the other channel, then WAC mode will
perform as desired.
The SM3BAT also offers a zero crossing format for recording bats.