Audacity Forum

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.

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