Recent content by JLM1948

Google "aggregate ASIO". ASIO4ALL for example.

How would it be better than 96000:1000=96? 1kHz is a historical reference in frequency response measurements.

Many simple power conditioners are just EMI/RFI filters. If the equipment has been properly designed, EMI/RFI protection should be already addressed. Adding two such filters is not damageable, but also not significant. There are some cases, as that of the OP, that require more than filtering...

So it's not balanced power, it's floating power. I think you can expect better performance noise-wise, with the equipment earthed. Screen to safety earth is good.

Making it balanced requires connecting its center tap to the earth of te receiving equipment. Without it, it is floating.

Are you positive that it's balanced? Medical equipment is often powerd from a floating iso transformer, which is somewhat diferent, particularly because it's extremely safe, which is not necessarily teh case with balanced power. Anyway, in most cases, good earthing negates the need for balanced...

This configuration is the one that provides best rear rejection, but the front response is restricted. Another possible configuration, "end-fire" array, optimizes the front response, at the cost of having a lesser and variable rejection. Restricting BW of the rear speaker allows fixing this...

What is the size of your room. Just to check it coincides with fundamental room modes. 52 and 85 Hz suggest 22' x 13' (6.50m x 4m)

I don't see any tunable bass traps there... Check https://www.acoustique-studio.com/ulysses-tuneable-bass-trap-noir-c2x21455692 or https://www.artnovion.com/product-categories/3-bass-trap/products/908-bass-trap-corner-slotted or http://arqen.com/store/vicoustic-vari-bass-helmholtz-resonator/...

You need to check tuned resonators. Most common is Helmholtz resonator.They are bulky, but you can tune them to perfection, as long as you have the proper measurement tools.

Note that the result may differ with the RTA settings. In particular if the resolution of the RTA is inferior to the slope of the crossover filters. If you want precision, you should do sweeps.

I really meant display. The circuit I'm testing is a constant-90° phase shifter. Indeed, the Relative level and phase panel gave me confirmation of expected operation. A graph is somewhat useful, though, in that particular case. Check...

OK, got it. It works on my bench . I don't suppose there's a possibility to produce a graph of the phase delta vs. fequency...? Not terribly important anyway. Thanks for your help.

I'm working on a 4-pole All-Pass filter, for which I want to display phase continuously. I tried to usz "Fit to data", but apparently it didn't do what I wanted, so I tried forcing manually the limits, which doesn't work either. Please find attached the measurement data files, the limits dialog...

Believe me, I have done that umpteen times. I have tested rather large inductors so far, so maybe I need to use a larger series resistor than the 1k I have used so far. I see John has measured a 10nF cap with a 100r resistor, so maybe I was too far off measuring a 60nf cap with a 1k series...