VO-BB - 20 YEARS OLD!

ballenberg · Posted: Sat Apr 07, 2012 2:29 pm Post subject:

Ah. Yes, well. It all take me back to the equation that I posted on these pages perhaps a year or two earlier. It is, in all it's magnitude:

SOUNDS GOOD=IS GOOD

And done.

Lance Blair · M&M Joined: 03 Jun 2007 Posts: 2281 Location: Atlanta

The best solution is clearly to turn your preamp down to about +5 gain and then scream into the microphone. Then you won't get any noise at all. Great for PSAs, children's audiobooks, and medical narrations.

I KEED!!!
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and now, http://lanceblairvo.com the blog is there now too!

Joniv · Posted: Sun Apr 08, 2012 9:54 am Post subject:

I just want to jump in here and say how much I personally appreciate all of you tech folks sharing your knowledge. I learn so much just reading your comments on various threads here Smile

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D Voice · Been Here Awhile Joined: 26 Jun 2010 Posts: 232

BTW I looked at a (logarithmic) Frequency Analysis of a few seconds of silence in the Soundcloud file you posted:

I can't figure out how to post screen shots here, but anyway, there is a big spike at 60Hz, and smaller ones at around 120, 180 and 240- all multiples of 60.

So you may have a 60 cycle hum. Which might be addressed to get your noise floor even lower.

Was just playing around with Notch Filtering in Audacity this weekend as well- lots of fun with math.[/img]

Lapianoman · Posted: Mon Apr 16, 2012 9:34 am Post subject:

Thanks so much D Voice! If you care to have another go at it, I've since posted a newer file to Soundcloud, now that I have a better preamp: http://soundcloud.com/lapianoman/re320-isa-one-test

My noise floor dropped from -56dB to around -63dB, which I'm thrilled about, but I'm now curious if that 60Hz hum is still showing. If so, I'd bet my PC is to blame.
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D Voice · Been Here Awhile Joined: 26 Jun 2010 Posts: 232

The posted RE320-ISA file doesn't have that Download button enabled.

But if you want to see what I was looking at, and since you already were able to use the Frequency Analysis in Audacity, open that, and as George suggested, switch "Axis": from Linear frequency to Log frequency.
Also, increase the "Size"- probably to around 4096 or 8192. Run the cursor along the graph to see where the peaks are.

Besides the hardware, also check the placement of the cables.

email me if you want quick instructions on how to use the Notch Filter function for existing files.

Lapianoman · Posted: Tue Apr 17, 2012 11:55 am Post subject:

Download enabled. I'll also give the frequency analysis another go.
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