[Quantum Pulsar]

Bear in mind that below 10 Hz there can be significant roll-off in soundcard inputs and outputs.

Not when you ball as hard as we do. :whistling:

Seriously though, I am pretty happy to hear that. Give me a date and I'll mark it on my calendar. Can you bump the high end past 24K while you're at it for signal chain measurement stuff?

 

[Quantum Pulsar]

Woo Hoo!

 

[Quantum Pulsar]

When you make a calibration file in REW, it applies the inverse response to the measurement right?
http://img1.imagehousing.com/57/00f371a2ed4737c9620a660eb9aa627c.png

My question is: does REW boost the actual signal levels of the sweep going out to your hardware or does it apply the inverse response digitally after the measurement is taken? :dontknow:

 

[Quantum Pulsar]

I can put different cal files on the measurements after they have been taken? How do I do that? I just tried to change the cal file after I took a measurement and the measurement was unaffected.

When I use an ASIO driver for my soundcard in REW and loop my out to in, it shows the noise floor at -142dB in the make a measurement and levels windows. That can't be right, it should show around -110dB at best for what I have. Is this a common thing for anyone who runs their ASIO in 24bit?

 

[Quantum Pulsar]

BTH, isn't that already on there?

http://img1.imagehousing.com/46/12d27e4ad35435e278ae1c93b27c7967.png

 

[Quantum Pulsar]

OK, now I get it. Thanks John.

I have an Essence STX and ASIO for all doesn't work with it. When I use the STX ASIO, it works but I don't konw if I can trust it because of what it tells me the noise floor is. What does your noise floor read, needspeed?

 

[Quantum Pulsar]

44dB is unbearably bad. What does it read when you switch to java drivers using 16bit?

 

[Quantum Pulsar]

You are misunderstanding my original point then.

I'm talking about looping your output to input and looking at the noise floor with no signal, not the noise floor of the room with a mic. Using 24bit in ASIO drivers, the noise floor has a theoretical limit of -144dB while using the Java 16bit setting will have a maximum of -96dB. Correct me if I am wrong John. My loopback measurement of the noise floor shows -142dB which is not possible.

Even if the noise of your room with a mic is -44db that is not typical, it's a loud room. I have quite a few amplifiers with fans going right in the front of the room and the noise floor stays around mid 60's.

If you are talking about looping your soundcard, -44dB is not only not typical but it is horrific.