...whats the best (low voltage) way of doing this?

 

Use a JFET.

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"Everything that is done in the world is done by hope." -Martin Luther
"There are two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."-Albert Einstein

 

ok, will do.

 

A rectified signal is full of even harmonics.
A JFET produces a little amount of even harmonics, maybe 5%.

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Uncle $crooge

 

What do you want to do with them? Do you want distorted audio, or...

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Ron

 

how low? the easy way it to just clip the wave with diodes.

Dan

 

Yeah, distorted audio but max even harmonics, minimum odd. It's for a 4 band EQ. I'm trying to get a tube sound with solid state parts.

 

A vacuum tube smoothly produces about 5% even harmonics distortion. Because the harmonics are smoothed then the high frequency harmonics are not produced.
A FET will sound similar.

An ordinary transistor produces severe even harmonics distortion when the output is fairly high, it has no negative feedback and the input is fed from a low impedance source.

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Uncle $crooge