Noise Reduction DIY >not gated< DIY?

orson198305 · 21st June 2006, 11:31 AM

Hello everyone, i've been searching for ages for a noise reduction project. I can't seem to find any. I don't mean a noise gate, i have one of those. I'm looking for a project like an old DBX or dolby noise reduction schematic to get rid of hissing and other annoyances in realtime. The simpler the better, as i have never had anything to do with noise reduction before.

Thanks In Advance

orson198305 · 21st June 2006, 08:04 PM

I have just found out that older more (DIYable) DBX & Dolby systems do not work in realtime. DBX have a new range of equalizers out with realtime noise reduction, but the circuit would probably be too complex to build. I came across "Hush" effects by "rocktron" (i think that's correct). if anyone could find an older model schematic that would be great.

Thanks

Optical · 25th June 2006, 06:14 AM

Yeah the Rocktron Hush effect is awesome.

Ive been looking for a schematic for it for ages too but havent had any luck..

rpapps · 25th June 2006, 06:24 AM

Hi
This might do it for ya if you can track down the chip.
They're still available here in Aus.

http://www.national.com/pf/LM/LM1894.html

Cheers
Rob

21st June 2006, 11:31 AM	#1
orson198305 diyAudio Member Join Date: May 2006	Noise Reduction DIY >not gated< DIY? Hello everyone, i've been searching for ages for a noise reduction project. I can't seem to find any. I don't mean a noise gate, i have one of those. I'm looking for a project like an old DBX or dolby noise reduction schematic to get rid of hissing and other annoyances in realtime. The simpler the better, as i have never had anything to do with noise reduction before. Thanks In Advance

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21st June 2006, 08:04 PM	#2
orson198305 diyAudio Member Join Date: May 2006	I have just found out that older more (DIYable) DBX & Dolby systems do not work in realtime. DBX have a new range of equalizers out with realtime noise reduction, but the circuit would probably be too complex to build. I came across "Hush" effects by "rocktron" (i think that's correct). if anyone could find an older model schematic that would be great. Thanks

25th June 2006, 06:14 AM	#3
Optical diyAudio Member Join Date: Nov 2002 Location: Auckland, New Zealand	Yeah the Rocktron Hush effect is awesome. Ive been looking for a schematic for it for ages too but havent had any luck..

25th June 2006, 06:24 AM	#4
rpapps diyAudio Member Join Date: Jul 2004 Location: nowhere of interest	Hi This might do it for ya if you can track down the chip. They're still available here in Aus. http://www.national.com/pf/LM/LM1894.html Cheers Rob

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