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Old 25th October 2010, 09:51 AM   #1
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Default compressor diy

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I soldered up this circuit today to find that it is utterly useless.
An output of 70mV from line level input.
bah! what a waste of time

I'm keen on DIY recording gear, and I want some compressors to run as inserts on my mixing console.

can anyone suggest a simple circuit?
I prefer veroboard, as I have no experience in making PCBs.
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Old 25th October 2010, 03:24 PM   #2
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What a waste of time? You learned something!
Interesting circuit, but it will not do to send clean audio to a mixing console! Low distortion compressors can not be build with 10 parts.
Go to thatcorp.com and check on their app notes on signal processing (parts THAT2180 and THAT4301)
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Old 26th October 2010, 09:50 AM   #3
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Default cheers

Thanks a lot mickeymoose. That site has a pretty comprehensive array of designs. I'm looking at the "one knob squeezer". http://www.thatcorp.com/datashts/dn125.pdf

It is slightly going against my original idea. I want to design simple veroboard diagrams using easy to find, straight off the shelf parts. I want to compile a bunch of simple audio circuits so that other people can reproduce them easily.

This is my first try Levy Sound Design: Electret Condenser Microphones

I'm currently working on a veroboard design of the "flatline compressor"
Click the image to open in full size.
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Old 28th October 2010, 06:57 AM   #4
audi0 is offline audi0  Australia
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Hi,
I remember seeing this compressor circuit in a Elektor circuit book, don't know if this circuit is worth a try?
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Old 28th October 2010, 11:27 AM   #5
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Quote:
Originally Posted by audi0 View Post
don't know if this circuit is worth a try?
That is exactly the circuit I made the other day.
I must have checked it twenty times trying to find something wrong with it, but even on my guitar amp, it attenuates the level way too much.

I guess you don't get anything for nothing. looks like passive isn't the way to go.
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Old 2nd November 2010, 05:12 PM   #6
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Compressors using Led / LDR use to work very well.
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Old 2nd November 2010, 05:36 PM   #7
LAJ is offline LAJ  United States
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Have you tried the Signetics NE570? It can be configured as a compressor or an expander. Its a two channel device also. It worked very well for me.
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Old 8th November 2010, 08:58 PM   #8
amz-fx is offline amz-fx  United States
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A couple of easy designs on my web site: SSM2166 Compressor

Easy is not a substitute for top audio quality but you can give it a try - use v2. It's going to be less noisy than the NE570. Small Bear Elec has some of the chips for sale.

regards, Jack
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Old 28th November 2010, 07:30 PM   #9
C13 is offline C13  Indonesia
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Quote:
Originally Posted by amz-fx View Post
A couple of easy designs on my web site: SSM2166 Compressor

Easy is not a substitute for top audio quality but you can give it a try - use v2. It's going to be less noisy than the NE570. Small Bear Elec has some of the chips for sale.

regards, Jack

whether the compressor can be applied with Daw ... for example be applied to mixdown from NUENDO 4..???
best regardds
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