Re: 192 kHz USB sound cards

[Gianni Pavan <>]

Hi, 
the E-MU Tracker Pre is a USB powered audio interface with 192kHz
sampling. The frequency range is flat up to 90 kHz and the anti-aliasing
filtering is pretty good. With high level signals exceeding 96 kHz (in
the range 96 to 105 kHz) you can get aliased components in the range 96
to 87 kHz. Graphs will be shown soon on our website.
This interface has only analog I/O. At max gain the mic inputs accept
levels up to 18mVpp (measured between pins 2 and 3 of the XLR
input).

Gianni Pavan

At 10.32 29/11/2008, you wrote:

Hi,
 
I have successfully tested the E-MU 0404 USB 2.0 Audio/MIDI Interface:
http://www.emu.com/products/product.asp?category=610&subcategory=611&product=15185&nav=features
 
It's frequency response is flat up to 90 kHz. Unfortunately, it is not BUS-powered, which means that it requires an external power adapter.
 
The frequency response and anti-aliasing characteristics of such audio interfaces are primarily determined by the A/D converter chips in them. The above unit employs the AK5385A chip, whose pass-band filter characteristics (at fs=192 kHz) can be found at page 10 of the data sheet: http://pdfdata.datasheetsite.com/pdf1/AKM/AK5385A.pdf .
 
Regards,
Raimund
 
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Raimund Specht
Avisoft Bioacoustics
Kirchstr. 11
13158 Berlin
Germany
 
tel +49 30 48476986
fax +49 30 48476987

www.avisoft.com
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