Denoising Audio track from VHS capture

[yup]

Hi all!

I am newbie for using audacity.
Recently I make capture VHS tape (recorded at 2002...2003 year) by Hitachi VM-2980E PAL camcorder which have only mono audio track.
I am using Panasonic DMR-ES35V DVD recorder with VCR with time base corrector Cypress CTB-100 and capture card Pinnacle Studio Movieboard 700-PCI. Software VirtualDub 1.9.9 under Windows XP all powered through online UPS and isolated transformer.
During recording Hitachi VM-2980E plug to mains (220v/50Hz).
Main problem is noise at mains frequency and harmonics.
When I make analyzing at begin tape (silence) I see background -63dB, largest peak at 50Hz -42Hz, at 150Hz -43dB, at 100Hz -51.7, at 75Hz -53.1.
First I make conversion from stereo to mono, second normalize and now try remove noise. Advice strategy for remove noise.
I think need use different approach remove flat background and sharp peak. May be could use noise reduction plugin more than one time with different preset.


With kind regards yup.

[steve]

Unfortunately the noise removal effect in Audacity is not so brilliant.
For Linux there is "Gnome Wave Cleaner" which is free and has a very high quality noise removal effect.
For Windows, you can still get the old "CoolEdit 2000" 30 day demo version for free - it's partially crippled, but the noise removal effect is excellent.

Other than that, using multiple notch filters may be the best option for removing the hum.
There's a hum removal (multiple notch filter) plug-in for Audacity 1.3 here: http://forum.audacityteam.org/viewtopic ... 907#p79907