Runs identically 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.

Operates entirely by a graphical user interface, although there are key shortcuts for the most-used operations.

Reference calls can be appended to a sequence view and are automatically adjusted to match the time and frequency scale of the view. view screenshots

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 screenshot

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 a screenshot

Compiled reference 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 a screenshot

Extensive analysis functions using screen-positioned cursors: low/high frequency, bandwidth, duration, call interval spacings, heel, slopes, characteristic frequencies, harmonics. view a screenshot

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 a screenshot

Time and frequency scales are programmed to match x10 time expanded audio data. Customized versions are available for other time expansion factors.

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 a screenshot

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 screenshots

All calls and call sequences can be played. In compressed view mode, an intelligent time position cursor waits during the "dead air" pauses.

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 and displayed.

A "hold frequency" zoom mode permits zoom selection of time segments without affecting the frequency scale.

Multiple zoom recovery with a single click.

Pop-up contextual help messages may be enabled. view a screenshot

Audible feedback of most button clicks. However, all sound play may be turned off.

Real-time adjustment of display amplitude intensity and threshold, i.e. the sonogram display changes immediately as the controls are adjusted. view comparative screenshots

Real-time sonogram 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 of screenshots

Print window feature of the current sonogram display.

Automatic adjustment of amplitude range. This enables comparison of faintly recorded calls with those of full level recorded calls.

Adjustable ruler can be displayed for comparing frequency of calls across the sonogram display. view the active ruler on this screenshot

In compressed 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 view.

A call displayed in standard view displays it’s time position within its parent sequence.

Seven standard view lengths are available: 10, 15, 20, 30, 40, 50, and 100 milliseconds.

Analysis data may be written to a spreadsheet.