No specific info about version 1.5. Please visit the main page of Spectrogram on Mac Informer.
GarageBand allows you to mix and create your own music tracks and podcasts.
Displays spectrogram representations of your audio files.
Leading multi-instrument, real-time audio analyzer for OS X...
iZotope Iris is a groundbreaking sample-based synthesizer.
Provides a number of signal generation & analysis tools with simple interfaces.