usb audio interface

[david12]

Hello,

I need to make some automated evaluations of audio input and output measures of several sound cards and mp3 players.

Are you aware of a good enough USB audio interface that I could use to do this?

Regards,
David

 

[nightanole]

M-AUDIO - MobilePre - Record Music with Your Computer

they make one higher if you need better

If you need higher rez but just single channel check out their transit

http://www.m-audio.com/products/en_us/Transit.html

 

[planet10]

You will be further ahead looking at Firewire interfaces. I can recommend this one from personal experience:

EDIROL FA-66 24Bit/192kHz FireWire Audio Capture

An externally hosted image should be here but it was not working when we last tested it.

dave

 

[david12]

Thanks for the answers.

However, these models have standard specifications:
input dynamic range: 100dB (typical, -60dB input, A-weighted)
signal-to-noise ratio: 100dB (typical, A-weighted)

In order to evaluate the specifications of other sounds cards and mp3 players,
I would need to have much higher measures than these standard ones.

Is there any other product that I could use?

Regards,
David

 

[nightanole]

DSO-2150 USB PC Based Oscilloscope • DIY Audio Projects Forum

Soundcard Interface

 

[richiem]

If your PC has the Intel High Definition Audio chipset as part of the main board, you can use the ARTA software for fairly high-res spectrum analysis and frequency response tests -- 24-bit and 96kHz as minimums. You can Google ARTA. It has a full-feature demo mode.

 

[david12]

Thanks for the info!

 

[luvdunhill]

You will be further ahead looking at Firewire interfaces. I can recommend this one from personal experience:

EDIROL FA-66 24Bit/192kHz FireWire Audio Capture

An externally hosted image should be here but it was not working when we last tested it.

dave

Dave, can you post basline RMAA measurements of this unit, with no DUT connected?

From my tests, it doesn't perform as well as say a E-MU 0404 USB.

 

[ramallo]

For me, the best in USB

USBPre 2 Microphone Interface for Computer Audio | Sound Devices, LLC

An externally hosted image should be here but it was not working when we last tested it.

 

[nightanole]

Is someone says "DUT test" or "DUT testing" or "what DUT are you testing" i will reach across the internet with my soldering iron.

Sorry i just have a test at work that literally says "Please do not touch the DUT testing please".

Ok some one else can vent about hot water heaters now.

 

[planet10]

Dave, can you post basline RMAA measurements of this unit, with no DUT connected?

From my tests, it doesn't perform as well as say a E-MU 0404 USB.

If i knew what you were asking i might be able to respond (but the answer is probably no)

Does the EMU fo 24/192?

dave

 

[luvdunhill]

I can post measurements later. Yes it does and can even do 32 bit measurements. I think you'll find the noise floor is about 10 dB lower as well, but I'd have to verify that with my tests.

 

[planet10]

Yes it does (24/192) and can even do 32 bit measurements.

Not in practise (at least for me): "Macintosh analog operation up to 96kHz and digital operation up to 48kHz only at this time."

It does 32 bit internal processing with 24 bit I/O. I expect that that is pretty common as it is the most sensible way to use the 32bit wide processors.

dave

 

[luvdunhill]

I have run tests with 32-bit I/O I can post. Yeah, if the drivers aren't up to snuff on the Mac, I'd look elsewhere.

 

[luvdunhill]

So, the Edirol uses CS5340 ADC and AK4385 DAC.

The E-MU 0404 uses AK5385A ADC and AK4396 DAC

The specs just looking at the datasheet shows what's theoretically possible.

E-MU 0404 in 32/96

E-MU 0404 in 24/96

Edirol FA66 (I cannot find my graphs for this one, but these are within +-0.2dB of what I remember, despite the sampling rate difference: