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Re: Use of a laptop / sound card for field recording

Subject: Re: Use of a laptop / sound card for field recording
From: Gianni Pavan <>
Date: Fri, 11 Feb 2005 08:45:17 -0800
<pre style="margin: 0em;">Here my experience withe laptop recording by using 
external audio in
 with mic preamplifiers and P48 powering:</pre><br>
 <pre style="margin: 0em;">The Edirol UA 5, although having a USB 1 interface, 
works well with
 low noise and flat response. It is very cheap now. Requires external
 DC power you can provide with a battery. Drivers are solid, in
 demanding applications it is important to set the internal buffer (in
 Control Panel) to max size.</pre><br>
 <pre style="margin: 0em;">The UA25 is even better, USB 2 and self-powered, but 
a bit less
 flexible as it lacks line level inputs.  Though be aware that some
 early units have strange interferences; for example, mine has a 12 kHz
 line that disappears when the unit warms up. In cold conditions I have
 to put it below the laptop to keep it warm!!!  A friend of mine got
 back his money because Edirol service admitted it was a defect.</pre><br>
 <pre style="margin: 0em;">If you like FireWire, the M-audio FireWire 410 is 
excellent and very
 solid.  Requires external power, but I don't remember if it requires
 AC or DC.  (...Always check for external power requirements: some units
 require 9 or 12 V AC!!!)</pre><br>
 <pre style="margin: 0em;">Last solution I successfully tested is based on 
CoreSound Mic2496
 optically coupled (this is great to reduce any possible interference)
 to CoreSound PDAudio CF card (just pure digital input without
 <pre style="margin: 0em;">Info on other options is welcome!
 <tt><br>At 19.17 10/02/2005, you wrote:
 </tt><blockquote style="border-left: #5555EE solid 0.2em; margin: 0em; 
padding-left: 0.85em"><pre style="margin: 0em;">Further to Jim Nollman's email 
about using a laptop / sound card to
 make field recordings: While this is my own preferred method, anyone
 hoping to sample at 96 kHz to record up to 48 kHz should be extremely
 careful about the sound card they buy. Several seem to have a low
 pass filter at around 22 or 24 kHz whatever sample rate you run them
 at, so you don't benefit at all from the higher sampling rate. Low
 frequency response may also be a serious issue since most cards are
 designed purely to capture audible sounds.</pre><br>
 <pre style="margin: 0em;">Low pass filtering at around 22 kHz is definitely 
the case with the
 Sound Blaster Extigy and the Edirol UA-20 (USB devices). The M-audio
 delta 44 (PCI interface so no good in laptops) is OK. I've not tested
 any others, but if anyone has found a USB sound card which will
 genuinely record to 48 kHz at 96 kHz sampling, I'd be interested to
 <pre style="margin: 0em;">Happy recording,</pre><br>
 <pre style="margin: 0em;">Douglas Gillespie
 [EMAIL PROTECTED]</pre><br>
 </blockquote><pre style="margin: 
 Gianni Pavan
 Centro Interdisciplinare di Bioacustica e Ricerche Ambientali
 Universita' degli Studi di Pavia
 Via Taramelli 24, 27100 PAVIA, ITALIA
 Tel        +39-0382-987874
 Fax        +39-02-700-32921
 Web       <a  href=""; 

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