Sunofix Lab
How to Compare Before-and-After Audio With a Spectrogram
Compare original and processed audio fairly by matching the source, spectrogram settings, playback level, listening passage, and decision criteria.
Sunofix Lab
Test cleanup decisions with evidence you can hear
First-party methods for level-matched A/B listening, representative test segments, spectrogram checks, device comparisons, and regression review—without exposing private implementation.
Listening map
Problems this hub covers
- Loudness bias during before-and-after comparison
- Choosing short test segments that reveal the real defect
- Using spectrograms without mistaking patterns for diagnosis
- Checking updates across headphones, speakers, and source types
Curated path
Start with this reading order
Move from diagnosis to action in sequence. Each guide answers a different decision instead of repeating the same cleanup advice.
- Step 01Create a visual referenceGenerate a private browser-only spectrogram and pair it with careful listening.
- Step 02Use a repeatable diagnosisFollow the same source checks and A/B sequence before and after cleanup.
- Step 03Test a specific defect classUse metallic shimmer as a focused example of audible evidence and treatment limits.
Category library
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Spectrogram vs Spectrum Analyzer: Which View Do You Need?
Choose between a spectrogram and a spectrum analyzer by matching the view to the sound: moving artifacts over time or steady frequency balance in one passage.
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Why Two Spectrograms of the Same Audio Can Look Different
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Learn a practical level-matched A/B test for audio cleanup, with rapid switching, a difficult chorus, playback checks, and a clear stop criterion.
Sunofix Lab
Audio to Spectrogram: What the Image Shows and What It Cannot
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Sunofix Lab
How to Spot Clipping and Over-Compression on a Spectrogram
Learn which waveform and spectrogram clues can support a clipping or over-compression check, which patterns mislead, and how to confirm the problem by listening.
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Spectrogram Frequency Axes Explained: Hz, kHz, Time, and Color
Learn how to read time, Hz, kHz, and relative color in an audio spectrogram, why resolution changes the picture, and how to confirm every visual clue by listening.
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WAV vs MP3 vs FLAC Spectrograms: What Changes?
Learn what can change when you compare WAV, MP3, and FLAC spectrograms, which differences matter, and which conclusions the image cannot support.
Change the question
Browse the full cleanup map
Work on the source
Use the guide to decide. Use your own track to confirm.
Start with the best export available, compare at the same listening level, and keep the cleanup only when it serves the song.
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