Export the spectrogram and spectrum#

Three export actions sit on the toolbar. Two produce data you can take into a spreadsheet or a script. One produces a picture for a report. The app re-analyses the data exports at full precision when you run them, so you do not get the quantised version that draws the screen.

Save the spectrogram as TSV#

TSV saves the current spectrogram as tab-separated values. The first row holds time labels in seconds. The first column holds frequency labels in hertz. Every other cell is a magnitude in decibels. Rows are frequency bins, and columns are time steps. The default file name is spectrogram.tsv.

The export covers the time range the spectrogram currently holds. It uses the FFT size, window, and channel set on the toolbar. Zoom first if you want only part of the file.

Save the spectrogram as PNG#

PNG saves the rendered spectrogram exactly as drawn. It bakes in the active palette, frequency scale, gain, and range. The default file name is spectrogram.png. Use this one for a report or a ticket, because it preserves what you saw when you spotted something.

Export Spectrum at the cursor#

Export Spectrum appears only when the spectrum panel is open and your pointer has set a cursor position. It writes two columns, frequency in hertz and magnitude in decibels, for the moment under the cursor. The default file name is spectrum.tsv.

Move the cursor and export again to capture a second moment. The app appends nothing, so each export is a separate file.

Each action opens a save dialog. If you cancel the dialog, the app writes nothing.