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Subject: making playback CDs
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Date: Fri, 7 Oct 2005 11:13:11 EDT
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Hello to all,
Perhaps someone can help me here. I want to use playbacks of long calls
for a survey of golden lion tamarins in Brazil. I have recorded calls
using a Sennheiser mic (MKH-67) and a Marantz PMD630 (minidisk). I
digitized the calls using RAVEN. I filtered the calls (bandpass) and
adjusted the RMS values to 1023 so that all calls (I have 8 different
calls) would have the same rms.
Then I copied the calls into a CD and tried to play them back with a
Discman attached to amplified speakers. The calls sound badly
distorted, even through the headphones, even after I lowered the RMS
values to 400. The calls sound fine on the computer and when played
from my home CD player.
Is this a limitation of CDs, discman, or a problem of voltage from
computer to discmans?
Thank you
Carlos Ruiz
Dr. Carlos R. Ruiz-Miranda
Professor Associado
Chefe do Laboratório
Laboratório de Ciências Ambientais
Centro de Biociências e Biotecnologia
Universidade Estadual Norte Fluminense
Campos dos goytacazes
RJ-Brasil 28013-600
55-22-2726-1471
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