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Old 15th October 2012, 06:13 PM   #11
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Tanks for the link Dave
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Old 15th October 2012, 06:33 PM   #12
euro21 is offline euro21  Hungary
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M-audio Transit.
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File Type: jpg M-audio Transit spectrum.jpg (130.0 KB, 424 views)
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Old 15th October 2012, 06:39 PM   #13
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I am currently using an M-Audio Firewire 410. It's an external box with Firewire connection to the computer and its own wall wart PS. Noise floor falls from -120 dBFS at the lowest frequencies to -140dB FS at the highest frequencies. Max sampling rate is 96k Hz. It also has a built in mic preamp with defeatable phantom power. They are discontinued, but you can pick them up on Ebay for easily under $100.

The newer option is the ProFire 610. Mostly the same, but sampling rate up to 192k Hz. This goes for about $250 I think.

See attached pic of noise floor. This is done using REW:
REW - Room EQ Wizard Home Page

-Charlie
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Last edited by CharlieLaub; 15th October 2012 at 06:44 PM.
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Old 16th October 2012, 12:31 AM   #14
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Doug, I can loan you a EMU 0404 USB, which in my opinion is the best choice. How can you beat try before you buy?
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Old 16th October 2012, 01:27 AM   #15
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Some more EMU0204 and EMU16 measurements are here

Soundcard Noise Performance - QuantAsylum Home Page

Some Roland measurements are here:

http://www.spectraplus.com/Downloads...TestReport.pdf
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Old 18th October 2012, 12:59 AM   #16
skidave is offline skidave  United States
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I'd like to try the Emu 0404 if you are willing. I'll cover return shipping.

Dave
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Old 18th October 2012, 10:09 AM   #17
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I have an E-MU 0204 and MI software and can measure down to 0.0003% distortion (without notch filters). Must use the balanced input to avoid earth loop noise even tho earth lift switches are part of the unit. For $230 odd dollars all up its a very effective solution for relative measurements.
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Old 22nd October 2012, 09:19 PM   #18
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Quote:
Originally Posted by luvdunhill View Post
Doug, I can loan you a EMU 0404 USB, which in my opinion is the best choice. How can you beat try before you buy?
I may take you up on that. I actually owned one for a week or so before I returned it. I recall there being a driver issue with it -- something like asio being required for using the digital output, but the free version of RMAA not supporting asio. But, I could certainly try it again as my current computer setup uses a different spdif output allowing me to work around that.

In the meantime, I picked up an M-Audio "MobilePre" that was on a huge sale and thus pretty cheap. Even cheap, it was probably not worth what I paid for it.
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Old 23rd October 2012, 12:04 PM   #19
dgta is offline dgta  United States
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Quote:
Originally Posted by triplej View Post
I have an E-MU 0204 and MI software and can measure down to 0.0003% distortion (without notch filters). Must use the balanced input to avoid earth loop noise even tho earth lift switches are part of the unit.
How do you use balanced input? Don't see that provision.
Just got my 0204 and haven't studied it yet.
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Old 23rd October 2012, 09:38 PM   #20
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Ahh yes its disguised as a 1/4 inch socket at first glance. It’s actually a combo XLR / 1/4 inch. It's definitely there

Specs:
Combo Preamplifiers (2)

Type:
- (1) Ultra-low noise combo preamplifier with Mic/Hi-Z/line inputs

- (1) Combo preamplifier with Hi-Z/line balanced input

- (1) 1/8" condenser mic input with 5V power
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