I have several OLD cassettes that I’m attempting to recover to CD. Most have the 60hz hum and the cassette hiss but I have one that has a steady “thrum” or pulse that renders it almost useless.
I’ve been able to make the 60hz hum tolerable with this:
(notch2
(notch2
(notch2
(notch2
(notch2
s
300 10)
240 8)
180 4)
120 2)
60 1)
and the hiss is reduced with a low pass filter but this thrum thing is not going away!
If anyone can tell me how to remove or at least reduce this to a tolerable level so I can save this recording I’d be very VERY grateful!
Also if anyone has some really good settings for eliminating cassette hiss I’d be really grateful.
Try posting a short audio sample that has the thrum noise on its own followed by the thrum mixed in with the speech or song. See How to post an audio sample .
Generally, try using a noise sample near the beginning of the cassette rather than the end.
Gale, Thank you for your reply. Thought I added samples??? Must have had another senior moment… anyway here’s the thrum and the thrum + vocal. These are both raw. I have not done any filtering on either of these samples.
I must say I’m new to Audacity when it comes to cassette to CD transfer. I mostly do direct to CD recording and those seldom need filtering or any post production work.
One thing should be mentioned and that is these are cassettes made from reel-to-reel masters created in 1950/51. The cassettes themselves are probably 15-20 years old. I’m trying to preserve as much as I can and cleanup enough of the garbage to make them listenable. I’m not expecting perfect recovery. Any help would be greatly appreciated!