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Spektra 0.5.0

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@rarepops rarepops released this 03 Jul 21:25
v0.5.0
0a6e04d

Spektra is a desktop audio spectrum analyzer: view spectrograms, get an automated "is this really lossless?" verdict, and compare two encodes side by side.

Highlights

  • Bandwidth verdict: detects a lossy low-pass cutoff and labels a file Lossless, Suspicious, Lossy, or band-limited, with a likely codec/bitrate guess.
  • Preferences: FFT size, window function (Hann/Hamming/Blackman/Blackman-Harris), palette (Magma/Viridis/Inferno/Grayscale), dynamic-range floor, and a linear or logarithmic frequency axis.
  • Inspection: cursor readout (time/frequency/dB) and a toggleable average-spectrum overlay.
  • Export: save the spectrogram to PNG or copy it to the clipboard.
  • Compare: stacked spectrograms on a shared time axis, synced zoom/pan, manual and automatic alignment, A/B flip, a signed A-B difference view with a numeric diff score, a null test, and drift detection.
  • Companion CLI: spektra report <files> and spektra scan <folder> for headless bandwidth checks and library transcode scans.

Downloads

Platform File
Windows GUI (installer) Spektra-0.5.0-Setup.msi
Windows GUI (portable) Spektra-0.5.0-win-x64.zip
CLI, Windows spektra-cli-0.5.0-win-x64.zip
CLI, Linux spektra-cli-0.5.0-linux-x64.zip
CLI, macOS Intel spektra-cli-0.5.0-osx-x64.zip
CLI, macOS Apple Silicon spektra-cli-0.5.0-osx-arm64.zip

All builds are self-contained, so no .NET install is needed. On Linux/macOS, mark the CLI executable after extracting: chmod +x spektra.

ffmpeg + ffprobe are required on PATH for decoding; the GUI can download them for you.

Licensed under PolyForm Strict 1.0.0.

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