Sunofix Lab
Audio to Spectrogram: What the Image Shows and What It Cannot
Convert WAV or MP3 audio to a 1920×840 spectrogram PNG. Follow the free browser workflow, read time and frequency, and check clipping clues by listening.
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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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.
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10 Spectrogram Reading Mistakes That Lead to Bad Audio Decisions
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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
Learn why window size, scale, normalization, color, and display dimensions can change a spectrogram, plus a repeatable method for comparing the same audio fairly.
Sunofix Lab
How to A/B Test Audio Cleanup Without Being Fooled by Loudness
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
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.
Sunofix Lab
How to Read a Spectrogram for AI Music Artifacts
Learn what time, frequency, and color show in a music spectrogram, which visual patterns deserve a listen, and which conclusions the picture cannot support.
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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.
Sunofix Lab
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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