Patsy Ramsey 911 Call - Analysis and Restoration (JonBenet Ramsey Murder)

Описание

0:00 - Intro
0:30 - My Background/Experience
1:55 - Original Audio
3:50 - Spectral Analysis
5:00 - Noise vs Harmonic sound
6:30 - Taking 2 Approaches
7:50 - Overview of the Audio - What I'm Hearing
9:00 - Tape Recording - How it Works and Why that Matters
15:00 - Broadband Noise Reduction (Approach #1)
18:30 - Taking Noise Reduction Too Far - Audio Artifact
19:55 - Removing Swish/Swipe sounds
21:50 - Focus on the Unclear Section
23:17 - Restoring the Unclear Section
33:25 - My Interpretation of the first Approach
37:35 - Spot Specific Noise Reduction (Approach #2)
42:20 - Spectral DeNoise - Tweaking the Settings
47:45 - Removing Low End
48:20 - Isolating Unclear elements
50:30 - Decrackling
52:00 - My Interpretation of the second Approach
53:13 - Pareidolia
54:45 - Personal Anecdote about Auditory Masking
56:50 - Audio Illusions - Diana Deutsch
57:30 - Alias tones, audio artifacts
59:00 - Squeaky Tape Machines
1:00:00 - Conclusion

Audio Files:
Broadband (Wav)
https://drive.google.com/file/d/1ssTWi-jH38MqnUssIZEYBTNvdL8NAqe9/view?usp=sharing

Spot Specific (Wav)
https://drive.google.com/file/d/1v8E-Svx8S9RNDf43qnX3OTtCYO6B3csU/view?usp=sharing

Broadband (MP3)
https://drive.google.com/file/d/1fPxrjOnB5MFEdnmVrizrgMFZrNmP0oIl/view?usp=sharing

Spot Specific (MP3)
https://drive.google.com/file/d/1N93kcWXfcy1LR0N-5k52Y0RL1YwbRw7q/view?usp=sharing


References:
https://en.wikipedia.org/wiki/Pareidolia
https://en.wikipedia.org/wiki/Mondegreen
https://en.wikipedia.org/wiki/Auditory_masking
https://en.wikipedia.org/wiki/Data_compressio #Lossy_audio_compression
https://en.wikipedia.org/wiki/Aliasing
https://www.soundonsound.com/sound-advice/q-what-aliasing-and-what-causes-it
https://theproaudiofiles.com/digital-audio-aliasing/
https://ozgurnevres.com/audio-illusions/
https://www.youtube.com/watch?v=w40XcUP5KrI
http://deutsch.ucsd.edu/psychology/pages.php?i=211
squeaky motors: https://www.youtube.com/watch?v=t3YLOlALF7k