...
below requires macOS ≥ 10.14
Xcode project and source code:
https://paloz.marum.de/bitbucket/scm/qlift/spectrogram.git
Screenshot:
...
below requires macOS ≥ 10.14
Xcode project and source code:
https://paloz.marum.de/bitbucket/scm/qlift/spectrogram.git
Screenshot: