on Windows and Macintosh platforms (up to Vista for Windows OS; PPC and Intel for Mac), and
you may seemlessly swap call files between the platforms.
by a graphical user interface, although there are key
shortcuts for the most-used operations.
can be appended to a sequence view and are automatically
adjusted to match the time and frequency scale of the view.
Any call may be selected
for very high resolution standard view display and have
a reference call displayed beside it with matching time and
frequency scales. view a
Any call displayed
in standard view may be stored with an accompanying text
note as a reference call, including the time position
of the call within the parent file. view
views allow a range of call varieties from a single species
(or more) to be displayed in a single view. With a library of
compiled reference views, you can quickly compare an unkown
call against the calls of a variety of candidate species. view
functions using screen-positioned cursors: low/high frequency,
bandwidth, duration, call interval spacings, heel, slopes, characteristic
frequencies, harmonics. view
File navigation is
shortened by saving call directories and the reference call
library along with other user settings in a preference
file, and an intelligent file dialog. view
Time and frequency
scales are programmed to match x10 time expanded audio
data. Customized versions are available for other time expansion
Calls are processed
from standard wav files. Acceptable wav formats are 22.05
kHz/8 bit, 22.05 kHz/16 bit, 44.1 kHz/8 bit, 44.1 kHz/16 bit.
The software automatically recognizes and displays which format.
Calls may be recorded
in any of these wav formats with the Recorder Accessory,
which provides real time amplitude feedback during recording.
view a screenshot
The Recorder Accessory
allows the selection of desired segment before saving to file.
This is especially useful for selecting a continuous sequence
from a looping audio output. view
Call files in 44.1
kHz/8 bit and 44.1 kHz/16 bit format are processed to display
frequency information up to the maximum frequency resolution
of the detector that acquired the call sequence, e.g. 175 kHz
for a Pettersson D980 which samples at 350 kHz. Call files in
22.05 kHz/8 bit and 22.05 kHz/16 bit format are processed to
display frequency information up to 110.25 kHz, the upper limit
of frequency information at this recording rate. (Keep in mind
the difference between the detector's sampling rate of
the actual sound, and the digital recording rate of the
x10 time expanded audio data.)
Very large files
open in a segment-select mode. The length of the segment
is user-definable to match the performance characteristics of
the host computer. In files requiring segment selection, the
selected segment remains in the selected location for reprocessing
if selected parameters are changed, e.g. a filter setting.
A selection of filters
are available: 5 kHz and 20 kHz cut off filters to eliminate
low frequency noise, and a special harmonic emphasis filter.
view comparative screenshots
Call sequences can
be opened in a real time view mode, or a compressed
view mode in which the "dead air" space between
calls is compressed; the degree of compression discrimination
is user-controlled. view
All calls and call
sequences can be played. In compressed view mode, an intelligent
time position cursor waits during the "dead air"
Reference calls of
a different wav format than the currently displayed file are
automatically converted to match the display file.
With a reference
call appended, calls may be compared aurally as well as visually.
In compressed view
mode, the call interval times are automatically calculated
A "hold frequency"
zoom mode permits zoom selection of time segments without affecting
the frequency scale.
Multiple zoom recovery
with a single click.
help messages may be enabled. view
of most button clicks. However, all sound play may be turned
of display amplitude intensity and threshold,
i.e. the sonogram display changes immediately as the controls
are adjusted. view comparative
palette changes from black background to white background,
and color to grayscale (useful for printing and publishing);
also, exclusive contour display of intensity levels
in grayscale. view a composite
feature of the current sonogram display.
of amplitude range. This enables comparison of faintly recorded
calls with those of full level recorded calls.
can be displayed for comparing frequency of calls across the
sonogram display. view the
active ruler on this screenshot
mode, standard view selection is automatically referenced
from whatever piece of a call that is zoom-selected. In real
time display, the standard view is centered on the zoom-selected
A call displayed
in standard view displays its time position within
its parent sequence.
view lengths are available: 10, 15, 20, 30, 40, 50, and
Analysis data may
be written to a spreadsheet.
- Automatic calculation
of real positions of aliased harmonic components. This
allows the use of frequency information as high as 350 kHz