Digitally repairing an old cassette recording with pitch warble? 2019-12-21 00:47:34 I am digitally capturing several old cassette tapes for a friend, and one of them - that was published in 1983 and has sat on a shelf for more than 30 years - suffers from cyclical pitch modulation or "warble". I suspect it's due to tape stretching because it gets significantly more pronounced near the end of the spool. At any rate, it's not the USB player I'm using, as only this one tape is affected, and it's consistent.I've run the tape through several times hoping it might just be a "stickiness", "dry rot" or contaminant problem...no luck. Since the pitch modulation is cyclical...does anyone know of an Audacity (or similar) plugin that might allow me to repair the audio? I've done a fair amount of Googling and, except for professional-grade tools, no one's had any ideas. But then again, most of the posts I found were 5+ years old.Thanks in advance.