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Discussion Starter · #841 ·
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.
Did you use the Change Cal button on the measurement panel?

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?
No, it's not.
 

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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?
I use 24 bit for input and output with no problems with ASIO driver
 

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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?
 

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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?
I'm using a Windows 8.1 laptop with the ASIO 24 bit and my noise floor is averaging about 44 dB, it has not gone beyond 48 even with cooling fans near my receiver. I've never heard of a noise floor being that high, Maybe John can help there........

Cheers Jeff
 

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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.
 

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Discussion Starter · #848 ·
I suspect you are talking about different things, the 44 dB is most likely an in-room SPL figure as opposed to the dB FS input level of a loopback connection. -142 dB on the input level meters would suggest that the data is being muted or heavily attenuated somewhere in the digital chain.
 

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I'm sorry my mistake, I didn't read the whole post just heard the noise floor mentioned, I do use 24 bit but not in the application you're referring to, again my mistake...
 
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