OT: Getting best noise reduction for phone Webinar

ken c wrote on 8/16/2007, 10:06 AM
Hi -

I just had a teleseminar recorded, and as usual there were big peaks and valleys between both parties, eg on my end, recording with an mp3 tap device, I was loud, and the person I interviewed sounded much quieter...

What I just did was to go through and manually do a -6dB cut on my voice segments, and a +6dB boost on the interviewees segments, to somewhat normalize it, and now the waveform is all same height. But now there's way too much noise, particularly on the +6dB boosted segments.

Using Sound Forge 9, or Audition, or Vegas audio plugins/NR, any ideas on how I can now reduce overall noise to make it sound good?

I like using the newbluefx crisper plugin to get better audio, not sure how to reduce noise using the newblue audio plugins, or sony's NR plugin - any tips? Much appreciated... this is an important interview with a *very* famous person, and I'd like to make it as high-quality as possible..

(eventually I'll get higher end telephone recording equipment, that's the root cause answer... but for now, I need to improve the audio from what I have).

Thanks very much,

Ken

for example, one great tip I picked up from Jeffrey Fisher is to add rolloffs above/below high and low end frequencies, I do this in vegas with the track EQ, eg to limit/fade the very highs and very lows, to reduce distortion..

UPDATE: I used the NewBlue "Cleaner" plugin with their drop down setting "Hum and Noise Begone!", then upped the master gain in Vegas by +4.8dB and it's a beautiful audio... simply amazing.

Comments

Dach wrote on 8/16/2007, 11:23 AM
Ken,

While I am not expert when it comes to audio, I would suggest trying the noise gate feature. Depending on the frequency of the unwanted noise, this may help eliminate it.

I use this as a standard process when cleaning up audio from interviews or v.o. work.

Chad
farss wrote on 8/16/2007, 5:41 PM
First thing to get is a proper hybrid, that'll do 2 wire to 4 wire line conversion and let you adjust levels of Me and Them independantly.

As I think you've realised, getting the best quality signal from the phone line is the place to start and it's not overly expensive compared to spending time trying to fix things after the fact.

Bob.
birdcat wrote on 8/17/2007, 5:39 AM
Hi Ken -

WOuld you be willing to post a short clip of before & after NewBlue cleaner - I'd love to hear the difference and could use something to help me clean the audio of the phone based webinars we record at work.

Thanks.

Bruce