Pro Audio Design Forum

I have a couple of questions about the schematic. What is the advantage of using the instrumentation amp over the THAT microphone preamp IC? (My guess is source impedance). Why use the 1240's as line drivers and not a 1646?

I have to say this is pretty awesome. I've had what this is rolling around in my head for a long time. Some features that I think would be very useful in the base station would be isolated balanced +4dbu outs and consumer RCA outputs. A meter buffer and adjustable output gain. This may be outside th...

Yeah, WOW. Very Dali but more "in the style of" than plagiarism. That must have cost some money and had an executive patron. Nowdays they'd just buy a Koons.

Great! Can't wait to see it.

I took a look around but couldn't find the NTP docs. When I run across them I;ll post them.

The CRT is only a couple of inches around. The image has to fill the screen no matter the level because there isn't much display room. I have the documentation around somewhere. I'll see if I can dig it out.

The best vectorscope for audio is the NTP in the CRT Danner cassette that was in the Neumann consoles. They have log amplifier inputs so they scale audio nicely. The display tubes are hard to come by though. I use an HP 1200B in the studio. It has balanced inputs which makes it easy to interface. Th...

Wow Wayne, that's fantastic work. I need to look at the post a few more times to grasp it. It's a bit of a brain teaser.

I think this is the same test you sent me sound files from, Wayne. I found the EE77 more effective at controlling vertical modulation on the lathe than the VAB84 approach. From the graph it looks like there is 2dB or so more attenuation around 40Hz or so. I think this accounts for it. If the steeper...

I was proposing doing the the normal EE response in the same style as the VAB. Maybe I'm not thinking clearly but wouldn't it be possible to do the same kind of external circuitry you did except instead of the complicated derivations just mix back in a reverse polarity LPF'd side channel signal deri...