Main Menu

Home

Products

Sample Champion
Overview
Features
Plug-ins

Download

Order

Support

Sample Champion
Manual on-line
FAQ and RAQ
Tips
Known issues

Resources

MLS theory
Application notes
Video Tutorials
Bibliography
Links

What's new

Contact us

Site Map


 
 
 

U2A and Sample Champion
Sample Champion

 

U2A USB sound card with Sample Champion


The following plot reports the frequency response of the U2A (obtained by means of a loop-back measurement and Sample Champion).

 

 

IMPORTANT: to obtain correct results, the "AUTO Sample Rate" selector in the U2A control panel must be disabled and the frequency must be manually set to 48 kHz. The Analog IN button of the Analog OUT selector, in the U2A control panel, must be DESELECTED.


Sample Champion can then be used at the following sample rates:

  • 48 Hz Recommended
  • 44100 Hz NOT ALLOWED (even if play/rec permitted)
  • 32000 Hz NOT ALLOWED (even if play/rec permitted)
  • 24000 Hz OK (*)
  • 22050 Hz OK (*)
  • 16000 Hz OK (*)
  • 11025 Hz OK (*)
  • 8000 Hz OK (*)
  • 5000 Hz OK (*)

(*) When using these sampling rates in Sample Champion, the Output % Level value (Settings/General) MUST be less than 45%, in order to avoid distortion.

NOTE: In the U24 soundcard the sampling rate problem has been resolved: 48000, 44100 and 32000 Hz sample frequencies are allowed in the U24.

This sound card has a behavior similar to that of the SBLive (see FAQ#2 about this topic).

And here follow some comparision tests between measurements performed with an U2A sound card and a Type I Level Meter Analyzer Larson Davis 2900B.


Loudspeaker measurement. Narrow band analysis: Larson Davis FFT resolution = 800 points. Software resolution (U2A) = 1024 points

 


1/3 Octave Analysis. Difference between values measured with the Larson Davis and with the U2A (dB)

The results are quite good!

Link to Egosys website, manufacturers of U2A:
http://www.egosys.net/main.html

 

 

HOME | PRODUCTS | DOWNLOAD | ORDER | SUPPORT | RESOURCES
WHAT'S NEW | CONTACT US | SITE MAP

Copyright 2004 PureBits.com - All Rights Reserved.