Pro Audio Design Forum

Thanks Doug. I did a lot of planning so that if I don't like something I'm not locked into it. I'm thinking erector set. I think the overall approach and concept is sound. It's been five years in the works. It can be hard to keep focus because as i learn more I see more options. To my credit I have ...

Thanks Wayne. It's a full H pad with a 10k input impedance and a 5k output impedance. I thought it was a good compromise to throw away 6dB and get a lowish source impedance but have a bridging load.

BTW I sent you an email yesterday for some more m/s boards. Did you get it?

I finished the prototype input and output amplifiers for the console with the Shallcos. http://www.saltmastering.com/a80/InOutFront.jpg http://www.saltmastering.com/a80/InOpenBack.jpg http://www.saltmastering.com/a80/OutClose1.jpg http://www.saltmastering.com/a80/monitor-2s.jpg That's the M/S board ...

Very interesting. Thanks.

If you want accuracy in the neighborhood of .1dB then I think a pot is only good for about +/- 3dB. I wanted +/- 12db but the largest switch Shallco makes is 46 position so +/- 11dB it is. It goes to 11!

I don't know if you can make this topology work in your application but you might consider some form of gain trim that is not a potentiometric configuration. The resistor errors add along the string. IIRC In the mic preamp gain switches I built, I was able to keep the errors <<0.1 dB with 1% resist...

I did the calculations for the potentiometer style attenuator. I even learned Reverse Polish Notaion to do it. Thanks iPAD! I ordered the resistors and did a mock up. The good news is that I basically got it right. The bad news is that even with .1% resistors the accuracy varies more than 0.2dB per ...

I think that in conjunction with dynamics or EQ processing having level trims in the MS domain - a "make-up" gain - would be useful. Yes. A common usage would be to compress the M channel to knock back a vocal and then use gain to bring the balance back. Or cut some woofy low end on hard ...

Doug, They are the attenuators for the input and output line amps for the A/B path lacquer mastering console I'm building. +/- 11dB in .5dB steps. They will be potentiometer style. Each two deck switch will control either Left Preview & Left Program or Right Preview & Right Program. Doing it...

Congratulations, I'll look for it.