Sound
Audio file
Channel
Playback
▶ Play
■ Stop
Speed
1×
1/2×
1/4×
1/10× (time expansion)
1/20×
Loop range
Space plays/pauses. Playback covers the selected annotation, or the visible stretch when none is selected. Slow the speed to hear ultrasonic recordings.
Spectrogram
Window type
Hann
Hamming
Blackman
Bartlett
Kaiser
Rectangular
Kaiser β
Window size (samples)
DFT size
Window overlap (%)
Contour
Amplitude floor (dB below peak)
Parabolic interpolation
Both off/blank = Raven behaviour: every slice gets a point, quantised to bin centres.
Annotations
Drag a box on the spectrogram to add a selection, drag its edges or corners to adjust it. Loading a file starts with one box covering the whole file.
Import selection table from Raven
Whole file
Export selection table
Clear all
Tab-delimited tables from Raven Pro or Raven Lite, including sound selection tables (
Begin File
/
File Offset (s)
). Export writes the same format with the PFC columns filled in.
Display
Dynamic range (dB)
Overlay contour
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Download CSV
Measurements