LessonCraft Audio Analyzer

Use this to check frequency shape, peak level, and RMS loudness. Target for spoken-word mobile listening: peak around -1 dB, RMS around -18 to -14 dB.

Peak (dBFS)
-∞
RMS (dBFS)
-∞
Dominant Band
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Spectrum (low bass on left, high treble on right)
Quick notes:
  • Too quiet in headphones: raise RMS with compression + normalization.
  • "Radio depth": gently boost 100-180 Hz and 2-4 kHz presence.
  • Avoid clipping: keep peak under -1 dBFS.
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