Re: Mid Side M-S Matrix Uses No Precision Resistors
Posted: Wed Apr 07, 2010 8:00 pm
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 as a bridged T would be better but I had to draw the line somewhere. These switches were expensive. I had Shallco make me a stereo 30 position 10k:5k H attenuator in 1.5dB steps for the monitor. 12 decks. That was expensive too. I think I'm going to make the line amp attenuators 3k. That's as low as I want to go as I haven't decided what will be driving them. Either a DOA or a chip.
The console is getting close. I've been working on it for over three years. I haven't talked about it much in public because it is such a huge project. I didn't know if I could do it when I started. The frame fabrication is almost done. I should have a four channel transfer path done in the next month or two. It will have the In/Out amps, HPF/LPF from the Neumann console (HT75), and an elliptical EQ. Roger did a beautiful job laying out the elliptical EQ board. This will allow me to remove the Neumann console and start using the transfer path for cutting. As I finish the EQ's and compressors I can add them in. Ed Anderson is designing the A/B path switch and crossfader. I hope to have that in June. Then it will be "done". Then on to trying my hand at designing an elaborate HPF/LPF set.
Just to toot my own horn, I believe this will be the most elaborate A/B console ever built. It's going to sound great too. All processing units are four channels. That's eight channels of everything. Each path will have a Barry Porter "net EQ", a Pico SEII, an Igor Sontec and a DAOC. There will also be a Maselec deesser for each path. It's a beast.
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 as a bridged T would be better but I had to draw the line somewhere. These switches were expensive. I had Shallco make me a stereo 30 position 10k:5k H attenuator in 1.5dB steps for the monitor. 12 decks. That was expensive too. I think I'm going to make the line amp attenuators 3k. That's as low as I want to go as I haven't decided what will be driving them. Either a DOA or a chip.
The console is getting close. I've been working on it for over three years. I haven't talked about it much in public because it is such a huge project. I didn't know if I could do it when I started. The frame fabrication is almost done. I should have a four channel transfer path done in the next month or two. It will have the In/Out amps, HPF/LPF from the Neumann console (HT75), and an elliptical EQ. Roger did a beautiful job laying out the elliptical EQ board. This will allow me to remove the Neumann console and start using the transfer path for cutting. As I finish the EQ's and compressors I can add them in. Ed Anderson is designing the A/B path switch and crossfader. I hope to have that in June. Then it will be "done". Then on to trying my hand at designing an elaborate HPF/LPF set.
Just to toot my own horn, I believe this will be the most elaborate A/B console ever built. It's going to sound great too. All processing units are four channels. That's eight channels of everything. Each path will have a Barry Porter "net EQ", a Pico SEII, an Igor Sontec and a DAOC. There will also be a Maselec deesser for each path. It's a beast.