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Re:Simulate cassette tape audio profiles using FFmpeg by spencerap on Sunday July 26, 2026 @09:12PM (#49064069)
I’m not sure of the correctness, but I see the author adjusting eq in the source, this is from the “BASF LH Extra C90” preset:

> highpass=f=50,lowpass=f=13000

> equalizer=f=500:width_type=q:width=0.8:g=-1.2,equalizer=f=6000:width_type=q:width=0.7:g=-4

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