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README.html
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README.html
@ -18,10 +18,10 @@
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</head>
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<body class="normal">
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<hr>
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<h1>SoundTouch audio processing library v1.3.9 (1.4.0-pre)
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<h1>SoundTouch audio processing library v1.4.0
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</h1>
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<p class="normal">SoundTouch library Copyright (c) Olli
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Parviainen 2002-2008 </p>
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Parviainen 2002-2009 </p>
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<hr>
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<h2>1. Introduction </h2>
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<p>SoundTouch is an open-source audio
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@ -47,47 +47,37 @@ data instead of 16bit integers. See section "sample data format"
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for more information.</p>
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<h3>2.1. Building in Microsoft Windows</h3>
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<p>Project files for Microsoft Visual C++ 6.0 and Visual C++ .NET are
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supplied with the source code package. Please notice that SoundTouch
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library uses processor-specific optimiations for Pentium III and AMD
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processors that require a processor pack upgrade for
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the Visual Studio 6.0 to be installed in order to support these
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optimiations. The processor pack upgrade can be downloaded from
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supplied with the source code package. </p>
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<p> Please notice that SoundTouch
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library uses processor-specific optimizations for Pentium III and AMD
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processors. Visual Studio .NET and later versions supports the required
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instructions by default, but Visual Studio 6.0 requires a processor pack upgrade
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to be installed in order to support these optimizations. The processor pack upgrade can be downloaded from
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Microsoft site at this URL:</p>
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<p><a
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href="http://msdn.microsoft.com/vstudio/downloads/tools/ppack/default.aspx">
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http://msdn.microsoft.com/vstudio/downloads/tools/ppack/default.aspx</a></p>
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<p><a href="http://msdn.microsoft.com/en-us/vstudio/aa718349.aspx">http://msdn.microsoft.com/en-us/vstudio/aa718349.aspx</a></p>
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<p>If the above URL is unavailable or removed, go
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to <a href="http://msdn.microsoft.com/">http://msdn.microsoft.com</a>
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and perform a search with keywords processor pack. </p>
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<p>Visual Studio .NET supports required
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instructions by default and thus doesn't require installing the
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processor pack.</p>
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<p>To build the binaries with Visual C++ 6.0
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compiler, either run "make-win.bat" script or open the
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and perform a search with keywords "processor pack". </p>
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<p>To build the binaries with Visual C++
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compiler, either run "make-win.bat" script, or open the
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appropriate project files in source code directories with Visual
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Studio. The final executable will appear under the "SoundTouch\bin"
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directory. If using the Visual Studio IDE instead of the
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make-win.bat script, directories bin and
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lib have to be created manually to the SoundTouch
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lib may need to be created manually to the SoundTouch
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package root for the final executables. The make-win.bat script
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creates these directories automatically.
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</p>
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<p>Also other C++ compilers than Visual C++ can be
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used, but project or makefiles then have to be adapted accordingly.
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Performance optimiations are written in Visual C++ compatible
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syntax, they may or may not be compatible with other compilers. If
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using GCC (Gnu C Compiler) compiler package such as DJGPP or Cygwin,
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please see next chapter for instructions. </p>
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<h3>2.2. Building in Gnu platforms</h3>
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<p>The SoundTouch library can be compiled in
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practically any platform supporting GNU compiler (GCC) tools.
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SoundTouch have been tested with gcc version 3.3.4., but it
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shouldn't be very specific about the gcc version. Assembler-level
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performance optimiations for GNU platform are currently available in
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performance optimizations for GNU platform are currently available in
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x86 platforms only, they are automatically disabled and replaced with
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standard C routines in other processor platforms.</p>
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<p>To build and install the binaries, run the
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following commands in SoundTouch/ directory:</p>
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following commands in the SoundTouch/ directory:</p>
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<table border="0" cellpadding="0" cellspacing="4">
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<tbody>
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<tr valign="top">
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@ -121,14 +111,13 @@ binaries to the destination locations.</p>
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</tr>
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</tbody>
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</table>
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<p><b>NOTE:</b> At the time of release the SoundTouch package has been
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<p><b>NOTE:</b> At the release time the SoundTouch package has been
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tested
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to compile in GNU/Linux platform. However, in past it's happened that
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new
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gcc versions aren't necessarily compatible with the assembler setttings
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used in the optimied routines. <b>If you have problems getting the
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SoundTouch library compiled, try the workaround of disabling the
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optimiations</b> by editing the file "include/STTypes.h" and removing
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used in the optimized routines. <b>If you have problems getting the
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SoundTouch library compiled, try the workaround of disabling the optimizations</b> by editing the file "include/STTypes.h" and removing
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the following definition there:</p>
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<blockquote>
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<pre>#define ALLOW_OPTIMIZATIONS 1</pre>
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@ -142,7 +131,7 @@ default is 32bit floating point. </p>
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<p>
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In Windows environment, the sample data format is chosen
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in file "STTypes.h" by choosing one of the following
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in file "STTypes.h" by choosing one of the following
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defines:</p>
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<ul>
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<li><span style="font-weight: bold;">#define INTEGER_SAMPLES</span>
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@ -194,8 +183,7 @@ effects, <em>sample rate transposing</em> and <em>time-stretching</em>.</p>
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<p><em>Sample rate transposing</em> affects
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both the audio stream duration and pitch. It's implemented simply
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by converting the original audio sample stream to the desired
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duration by interpolating from the original audio samples. In
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SoundTouch, linear interpolation with anti-alias filtering is
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duration by interpolating from the original audio samples. In SoundTouch, linear interpolation with anti-alias filtering is
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used. Theoretically a higher-order interpolation provide better
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result than 1st order linear interpolation, but in audio
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application linear interpolation together with anti-alias
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@ -228,7 +216,7 @@ original duration but increased pitch.</li>
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</ul>
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<h3>3.4 Tuning the algorithm parameters</h3>
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<p>The time-stretch algorithm has few
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parameters that can be tuned to optimie sound quality for
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parameters that can be tuned to optimize sound quality for
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certain application. The current default parameters have been
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chosen by iterative if-then analysis (read: "trial and error")
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to obtain best subjective sound quality in pop/rock music
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@ -236,10 +224,10 @@ processing, but in applications processing different kind of
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sound the default parameter set may result into a sub-optimal
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result.</p>
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<p>The time-stretch algorithm default
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parameter values are set by these #defines in file "TDStretch.h":</p>
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parameter values are set by these #defines in file "TDStretch.h":</p>
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<blockquote>
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<pre>#define DEFAULT_SEQUENCE_MS 82
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#define DEFAULT_SEEKWINDOW_MS 28
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<pre>#define DEFAULT_SEQUENCE_MS AUTOMATIC
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#define DEFAULT_SEEKWINDOW_MS AUTOMATIC
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#define DEFAULT_OVERLAP_MS 12</pre>
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</blockquote>
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<p>These parameters affect to the time-stretch
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@ -251,13 +239,16 @@ which determines the how the original sound is chopped in
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the time-stretch algorithm. Larger values mean fewer sequences
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are used in processing. In principle a larger value sounds better when
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slowing down the tempo, but worse when increasing the tempo and vice
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versa.<br>
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versa. <br>
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<br>
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By default, this setting value is calculated automatically according to
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tempo value.<br>
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</li>
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<li><strong>DEFAULT_SEEKWINDOW_MS</strong>: The seeking window
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default length in milliseconds is for the algorithm that seeks the best
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possible overlapping location. This determines from how
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wide a sample "window" the algorithm can use to find an optimal mixing
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location when the sound sequences are to be linked back together.<br>
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location when the sound sequences are to be linked back together. <br>
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<br>
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The bigger this window setting is, the higher the possibility to find a
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better mixing position becomes, but at the same time large values may
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@ -265,6 +256,9 @@ cause a "drifting" sound artifact because neighboring sequences can be
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chosen at more uneven intervals. If there's a disturbing artifact that
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sounds as if a constant frequency was drifting around, try reducing
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this setting.<br>
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<br>
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By default, this setting value is calculated automatically according to
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tempo value.<br>
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</li>
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<li><strong>DEFAULT_OVERLAP_MS</strong>: Overlap
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length in milliseconds. When the sound sequences are mixed back
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@ -290,9 +284,7 @@ magnitude</strong></td>
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affects...</strong></td>
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<td valign="top"><strong>Smaller value
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affects...</strong></td>
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<td valign="top"><strong>Music</strong></td>
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<td valign="top"><strong>Speech</strong></td>
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<td valign="top"><strong>Effect in CPU burden</strong></td>
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<td valign="top"><strong>Effect to CPU burden</strong></td>
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</tr>
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<tr>
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<td valign="top">
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@ -306,9 +298,6 @@ better for slowing down tempo. Growing the value decelerates the
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<td valign="top">Smaller value might be better
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for speeding up tempo. Reducing the value accelerates the "echoing"
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artifact when slowing down the tempo </td>
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<td valign="top">Default value usually good</td>
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<td valign="top">A smaller value than default
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might be better</td>
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<td valign="top">Increasing the parameter
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value reduces computation burden</td>
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</tr>
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@ -322,9 +311,6 @@ large, chosen for slowing down music tempo</td>
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good mixing position, but may cause a "drifting" artifact</td>
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<td valign="top">Smaller reduce possibility to
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find a good mixing position, but reduce the "drifting" artifact.</td>
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<td valign="top">Default value usually good,
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unless a "drifting" artifact is disturbing.</td>
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<td valign="top">Default value usually good</td>
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<td valign="top">Increasing the parameter
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value increases computation burden</td>
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</tr>
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@ -337,15 +323,13 @@ large, chosen to suit with above parameters.</td>
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<td valign="top"> </td>
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<td valign="top">If you reduce the "sequence
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ms" setting, you might wish to try a smaller value.</td>
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<td valign="top"> </td>
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<td valign="top"> </td>
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<td valign="top">Increasing the parameter
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value increases computation burden</td>
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</tr>
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</tbody>
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</table>
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<h3>3.5 Performance Optimiations </h3>
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<p><strong>General optimiations:</strong></p>
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<h3>3.5 Performance Optimizations </h3>
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<p><strong>General optimizations:</strong></p>
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<p>The time-stretch routine has a 'quick' mode
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that substantially speeds up the algorithm but may degrade the
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sound quality by a small amount. This mode is activated by
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@ -354,34 +338,55 @@ of SETTING_USE_QUICKSEEK and value "1", i.e. </p>
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<blockquote>
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<p>setSetting(SETTING_USE_QUICKSEEK, 1);</p>
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</blockquote>
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<p><strong>CPU-specific optimiations:</strong></p>
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<p><strong>CPU-specific optimizations:</strong></p>
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<ul>
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<li>Intel MMX optimied routines are used with
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compatible CPUs when 16bit integer sample type is used. MMX
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optimiations are available both in Win32 and Gnu/x86 platforms.
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<li>Intel MMX optimized routines are used with
|
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compatible CPUs when 16bit integer sample type is used. MMX optimizations are available both in Win32 and Gnu/x86 platforms.
|
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Compatible processors are Intel PentiumMMX and later; AMD K6-2, Athlon
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and later. </li>
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<li>Intel SSE optimied routines are used with
|
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compatible CPUs when floating point sample type is used. SSE
|
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optimiations are currently implemented for Win32 platform only.
|
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<li>Intel SSE optimized routines are used with
|
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compatible CPUs when floating point sample type is used. SSE optimizations are currently implemented for Win32 platform only.
|
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Processors compatible with SSE extension are Intel processors starting
|
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from Pentium-III, and AMD processors starting from Athlon XP. </li>
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<li>AMD 3DNow! optimied routines are used with
|
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<li>AMD 3DNow! optimized routines are used with
|
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compatible CPUs when floating point sample type is used, but SSE
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extension isn't supported . 3DNow! optimiations are currently
|
||||
implemented for Win32 platform only. These optimiations are used in
|
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extension isn't supported . 3DNow! optimizations are currently
|
||||
implemented for Win32 platform only. These optimizations are used in
|
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AMD K6-2 and Athlon (classic) CPU's; better performing SSE routines are
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used with AMD processor starting from Athlon XP. </li>
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</ul>
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<h3>3.6 GNU compilation issues </h3>
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<p><b>Required GNU tools</b> </p>
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<p> Bash shell, GNU C++ compiler, autoconf and automake tools are required to compile
|
||||
the SoundTouch library. These are usually included in the Linux distribution, but if
|
||||
not, install these packages. For example, in Ubuntu these can be acquired and
|
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installed in the "build-essentials" package by the following command:</p>
|
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<pre><b>sudo apt-get install build-essential</b></pre>
|
||||
<p><b>Problems with configure script or build process</b> </p>
|
||||
<p>Due differences between various GNU toolchain versions, you may get errors when running the "configure" script or building the source
|
||||
codes, if your GNU tool versions are not compatible with the versions used for
|
||||
preparing the SoundTouch kit. </p>
|
||||
<p>In such case, regenerate the configure script with your local tools by running
|
||||
the "<b>./bootstrap</b>" script included in the SoundTouch source code
|
||||
kit. After that, run the <b>configure</b> script and <b>make</b> as usually.</p>
|
||||
<p><b>Compiler issues with non-x86 processors</b></p>
|
||||
<p>SoundTouch works also on non-x86 processors.</p>
|
||||
<p>However, in case that you get compiler errors when compiling for non-Intel processor,
|
||||
then edit the file
|
||||
"<b>source\SoundTouch\Makefile.am</b>" and remove the "<b>-msse2</b>"
|
||||
flag on the <b>AM_CXXFLAGS </b>line:</p>
|
||||
<pre><b>AM_CXXFLAGS=-O3 -fcheck-new -I../../include # Note: -msse2 flag removed!</b></pre>
|
||||
<p>After that, run "<b>./bootstrap</b>" script, and then run <b>configure</b>
|
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and <b>make</b> again.</p>
|
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<hr>
|
||||
<h2><a name="SoundStretch"></a>4. SoundStretch audio processing utility
|
||||
</h2>
|
||||
<p>SoundStretch audio processing utility<br>
|
||||
Copyright (c) Olli Parviainen 2002-2005</p>
|
||||
Copyright (c) Olli Parviainen 2002-2009</p>
|
||||
<p>SoundStretch is a simple command-line
|
||||
application that can change tempo, pitch and playback rates of
|
||||
WAV sound files. This program is intended primarily to
|
||||
demonstrate how the "SoundTouch" library can be used to
|
||||
demonstrate how the "SoundTouch" library can be used to
|
||||
process sound in your own program, but it can as well be used for
|
||||
processing sound files.</p>
|
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<h3>4.1. SoundStretch Usage Instructions</h3>
|
||||
@ -448,8 +453,8 @@ n percents (n = -95.0 .. +5000.0 %) </td>
|
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<td valign="top">
|
||||
<pre>-bpm=n</pre>
|
||||
</td>
|
||||
<td valign="top">Detect the Beats-Per-Minute
|
||||
(BPM) rate of the sound and adjust the tempo to meet 'n' BPMs. When this switch is
|
||||
<td valign="top">Detect the Beats-Per-Minute (BPM) rate of the sound and adjust the tempo to meet 'n'
|
||||
BPMs. When this switch is
|
||||
applied, the "-tempo" switch is ignored. If "=n" is
|
||||
omitted, i.e. switch "-bpm" is used alone, then the BPM rate is
|
||||
estimated and displayed, but tempo not adjusted according to the BPM
|
||||
@ -532,13 +537,15 @@ estimates the BPM rate:</p>
|
||||
<h2>5. Change History</h2>
|
||||
<h3>5.1. SoundTouch library Change History </h3>
|
||||
|
||||
<p><strong>v1.3.9 (1.4.0 pre):</strong></p>
|
||||
<p><strong>1.4.0:</strong></p>
|
||||
<ul>
|
||||
<li>Improved sound quality by automatic calculation of time stretch algorithm
|
||||
processing parameters according to tempo setting</li>
|
||||
<li>Moved BPM detection routines from SoundStretch application into SoundTouch
|
||||
library</li>
|
||||
<li>Bugfixes: Using uninitialied variables, GNU build scripts, compiler errors
|
||||
<li>Bugfixes: Usage of uninitialied variables, GNU build scripts, compiler errors
|
||||
due to 'const' keyword mismatch.</li>
|
||||
<li>Some source code cleanup</li>
|
||||
<li>Source code cleanup</li>
|
||||
|
||||
</ul>
|
||||
|
||||
@ -546,10 +553,10 @@ estimates the BPM rate:</p>
|
||||
</strong></p>
|
||||
<ul>
|
||||
<li>Changed static class declaration to GCC 4.x compiler compatible syntax.</li>
|
||||
<li>Enabled MMX/SSE-optimied routines also for GCC compilers. Earlier
|
||||
the MMX/SSE-optimied routines were written in compiler-specific inline
|
||||
<li>Enabled MMX/SSE-optimized routines also for GCC compilers. Earlier
|
||||
the MMX/SSE-optimized routines were written in compiler-specific inline
|
||||
assembler, now these routines are migrated to use compiler intrinsic
|
||||
syntax which allows compiling the same MMX/SSE-optimied source code with
|
||||
syntax which allows compiling the same MMX/SSE-optimized source code with
|
||||
both Visual C++ and GCC compilers. </li>
|
||||
<li>Set floating point as the default sample format and added switch to
|
||||
the GNU configure script for selecting the other sample format.</li>
|
||||
@ -563,13 +570,13 @@ the GNU configure script for selecting the other sample format.</li>
|
||||
error </li>
|
||||
<li>Implemented separate processing routines for integer and
|
||||
floating arithmetic to allow improvements to floating point routines
|
||||
(earlier used algorithms mostly optimied for integer arithmetic also
|
||||
(earlier used algorithms mostly optimized for integer arithmetic also
|
||||
for floating point samples) </li>
|
||||
<li>Fixed a bug that distorts sound if sample rate changes during the
|
||||
sound stream </li>
|
||||
<li>Fixed a memory leak that appeared in MMX/SSE/3DNow! optimied
|
||||
<li>Fixed a memory leak that appeared in MMX/SSE/3DNow! optimized
|
||||
routines </li>
|
||||
<li>Reduced redundant code pieces in MMX/SSE/3DNow! optimied
|
||||
<li>Reduced redundant code pieces in MMX/SSE/3DNow! optimized
|
||||
routines vs. the standard C routines.</li>
|
||||
<li>MMX routine incompatibility with new gcc compiler versions </li>
|
||||
<li>Other miscellaneous bug fixes </li>
|
||||
@ -587,8 +594,7 @@ SAMPLETYPE definitions.</li>
|
||||
<p><strong>v1.2.0: </strong></p>
|
||||
<ul>
|
||||
<li>Added support for 32bit floating point sample
|
||||
data type with SSE/3DNow! optimiations for Win32 platform (SSE/3DNow!
|
||||
optimiations currently not supported in GCC environment)</li>
|
||||
data type with SSE/3DNow! optimizations for Win32 platform (SSE/3DNow! optimizations currently not supported in GCC environment)</li>
|
||||
<li>Replaced 'make-gcc' script for GNU environment
|
||||
by master Makefile</li>
|
||||
<li>Added time-stretch routine configurability to
|
||||
@ -599,8 +605,7 @@ SoundTouch main class</li>
|
||||
<ul>
|
||||
<li>Moved SoundTouch under lesser GPL license (LGPL). This allows using SoundTouch library in programs that aren't
|
||||
released under GPL license. </li>
|
||||
<li>Changed MMX routine organiation so that MMX
|
||||
optimied routines are now implemented in classes that are derived from
|
||||
<li>Changed MMX routine organiation so that MMX optimized routines are now implemented in classes that are derived from
|
||||
the basic classes having the standard non-mmx routines. </li>
|
||||
<li>MMX routines to support gcc version 3. </li>
|
||||
<li>Replaced windows makefiles by script using the .dsw files </li>
|
||||
@ -622,18 +627,19 @@ files. </li>
|
||||
<h3>5.2. SoundStretch application Change
|
||||
History </h3>
|
||||
|
||||
<p><strong>v1.3.9 (1.4.0 pre):</strong></p>
|
||||
<p><strong>1.4.0:</strong></p>
|
||||
<ul>
|
||||
<li>Moved BPM detection routines from SoundStretch application into SoundTouch
|
||||
library</li>
|
||||
<li>Allow using standard input/output pipes for processing </li>
|
||||
<li>Allow using standard input/output pipes as audio processing input/output
|
||||
streams</li>
|
||||
|
||||
</ul>
|
||||
|
||||
<p><strong>v1.3.0:</strong></p>
|
||||
<ul>
|
||||
<li>Simplified accessing WAV files with floating
|
||||
point sample format.<br>
|
||||
point sample format.
|
||||
</li>
|
||||
</ul>
|
||||
<p><strong>v1.2.1: </strong></p>
|
||||
@ -686,9 +692,8 @@ SoundTouch v1.3.1: </p>
|
||||
Copyright (c) Olli Parviainen</p>
|
||||
<p>This library is free software; you can
|
||||
redistribute it and/or modify it under the terms of the GNU
|
||||
Lesser General Public License as published by the Free Software
|
||||
Foundation; either version 2.1 of the License, or (at your option)
|
||||
any later version.</p>
|
||||
Lesser General Public License vesrion 2.1 as published by the Free Software
|
||||
Foundation.</p>
|
||||
<p>This library is distributed in the hope
|
||||
that it will be useful, but WITHOUT ANY WARRANTY; without even
|
||||
the implied warranty of MERCHANTABILITY or FITNESS FOR A
|
||||
|
||||
Loading…
Reference in New Issue
Block a user