• Potentially adding a gaussian-like blur
• Apparently YT algo is trained with artificial noise added in to increase the robustness of the detection
• Might be the case that in order to go undetectable with gaussian blur, the music becomes completely unrecognizable.

Copyright detection systems often employ techniques such as:

• Audio fingerprinting
• Cross-correlation
• Spectral analysis

Content ID's algorithms extract robust audio features like:

• Spectral peaks: High-energy points in the frequency spectrum.
• Harmonic relationships: Relationships between frequencies that define melody and timbre.
• Rhythmic patterns: Temporal structure of beats and notes.

Some creators attempt various techniques to avoid detection, but these are usually ineffective or unreliable:

1. Pitch shifting: Slightly changing the pitch of the audio.
2. Speed changes: Slowing down or speeding up the track.
3. Noise overlay: Adding background noise.
4. Reversing audio: Playing the track backward.