core/audio/visualization library
Functions
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saveSpectrogramImage(
List< Float64List> spectrogramDb, String outputPath, {required int sampleRate, required int hopLength, double fMin = 0.0, double? fMax, double topDb = 80.0, String title = 'Spectrogram', int plotWidth = 800, int plotHeight = 256, bool useNearest = true, bool isMel = true}) → Future<void> - Renders a Mel spectrogram in dB to a PNG image file.