iSpectrum
iSpectrum Analyzer is an audio spectrum analyzer for macOS that visualises sound in real time using spectrum, oscilloscope, and waterfall frequency displays. It supports user-selectable bandwidth settings (500 Hz, 2.5 kHz, 10 kHz, 20 kHz), works with system and USB microphones, and allows users to save analysis images to disk. It is used by audio engineers, musicians, acousticians and other professionals who need to inspect audio signals in detail.
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1 suggestioniSpectrum Analyzer 2.0 and later ship as a Universal Binary, which means it includes both Intel and native Apple Silicon code in the same installer. If you are running a recent copy downloaded from Dog Park Software within the last few years, your installation likely already contains the native build and will run natively on M-series Macs without any action needed. To confirm, open iSpectrum and check About → Version or look for any auto-update notifications from the vendor. If you are unsure which build you have, you can reinstall from the Dog Park Software website to ensure you have the latest Universal Binary. Since you have until September 2028 before Rosetta 2 is removed, there is no immediate urgency, but updating to the latest version will give you noticeably better performance and battery life if you currently have an older Intel-only build.
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