Spek Spectrogram analyzer

7/8/2026

🎉 Welcome to Spek — your professional spectrogram analyzer!

What's inside:
• Open WAV, FLAC, MP3, AAC, OGG, M4A & AIFF files
• FFT sizes 1024–8192 with Hann, Hamming & Rectangular windows
• Pinch-to-zoom spectrogram with Linear & Log frequency scaling
• Playback-synced playhead cursor
• Live microphone spectrum capture
• Left / Right / Mono channel selection
• Adjustable dB range (-120 to 0 dB)
• 100% offline — no uploads, no accounts

See your sound. Trust every file.