1 "", 2 " XAnalyser - A frequence spectrum analyser for X Window", 3 " Version " VERSION "", 4 "", 5 " Copyright (c) 1998-2006 by Arvin Schnell", 6 "", 7 "", 8 "", 9 "Source:", 10 "", 11 " The source is either the soundcard or a diskfile. The name of the diskfile", 12 " can only be specified on the commandline.", 13 "", 14 "", 15 "Frequency Spectrum:", 16 "", 17 " The frequency analyser showes the frequency spectrum of the source, either", 18 " separately for both channels or together.", 19 "", 20 " The sampled data are windowed with a gaussian exponential function. This", 21 " function has a single parameter called alpha. A small value gives very sharp", 22 " peaks but also much noise over a wide frequence range. A bigger value", 23 " reduces this noise but also makes the peaks wider. You can best study the", 24 " effect with a sine wave (e.g. audio test CD).", 25 "", 26 "XY Scope:", 27 "", 28 " Roughly speaking the XY scope draws a plots where the left channel is used", 29 " for the x axis and the right channel for the y axis. Thus a audio signal", 30 " only present on the left channel produces a horizontal line, whereas a audio", 31 " signal only present on the right channel produces a vertical line.", 32 "", 33 " This is very useful to check if a signal is mono or stereo. A mono signal", 34 " procedures a thin line from the left bottom to the right top. A stereo", 35 " signal gives a very wide line or even fills the entire scope. (Just check it", 36 " out.)", 37 "", 38 "Copyright:", 39 "", 40 "This program is free software; you can redistribute it and/or modify it under", 41 "the terms of the GNU General Public License as published by the Free Software", 42 "Foundation; either version 2 of the License, or (at your option) any later", 43 "version.", 44 "", 45 "This program is distributed in the hope that it will be useful, but WITHOUT", 46 "ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS", 47 "FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.", 48 "", 49 "You should have received a copy of the GNU General Public License along with", 50 "this program; if not, write to the Free Software Foundation, Inc., 675 Mass", 51 "Ave, Cambridge, MA 02139, USA.", 52 "", 53