File: sampling.html

package info (click to toggle)
python-pyo 1.0.6-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 52,332 kB
  • sloc: python: 135,133; ansic: 127,822; javascript: 16,116; sh: 395; makefile: 388; cpp: 242
file content (180 lines) | stat: -rw-r--r-- 13,831 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
 

<!DOCTYPE html>

<html lang="en">
<head>
<meta charset="utf-8"/>
<meta content="width=device-width, initial-scale=1.0" name="viewport"/><meta content="Docutils 0.17.1: http://docutils.sourceforge.net/" name="generator"/>
<title>Resampling — Pyo 1.0.5 documentation</title>
<link href="../../_static/pygments.css" rel="stylesheet" type="text/css"/>
<link href="../../_static/agogo.css" rel="stylesheet" type="text/css"/>
<link href="../../_static/sphinx-codeautolink.css" rel="stylesheet" type="text/css"/>
<link href="../../_static/autoclasstoc.css" rel="stylesheet" type="text/css"/>
<script data-url_root="../../" id="documentation_options" src="../../_static/documentation_options.js"></script>
<script src="../../_static/jquery.js"></script>
<script src="../../_static/underscore.js"></script>
<script src="../../_static/_sphinx_javascript_frameworks_compat.js"></script>
<script src="../../_static/doctools.js"></script>
<script src="../../_static/sphinx_highlight.js"></script>
<link href="../../_static/E-PyoIcon.ico" rel="shortcut icon"/>
<link href="../../about.html" rel="author" title="About these documents"/>
<link href="../../genindex.html" rel="index" title="Index"/>
<link href="../../search.html" rel="search" title="Search"/>
<link href="conv.html" rel="next" title="Conversions"/>
<link href="sndfile.html" rel="prev" title="Soundfile"/>
</head><body>
<div class="header-wrapper" role="banner">
<div class="header">
<div class="headertitle"><a href="../../index.html">Pyo 1.0.5 documentation</a></div>
<div aria-label="related navigation" class="rel" role="navigation">
<a accesskey="P" href="sndfile.html" title="Soundfile">previous</a> |
          <a accesskey="N" href="conv.html" title="Conversions">next</a> |
          <a accesskey="I" href="../../genindex.html" title="General Index">index</a>
</div>
</div>
</div>
<div class="content-wrapper">
<div class="content">
<div class="sidebar">
<h3>Table of Contents</h3>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../../about.html">About pyo</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../download.html">Installing pyo with pip</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../compiling.html">Compiling pyo from sources</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../structure.html">Structure of the library</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../gettingstarted.html">Getting started</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../winaudioinspect.html">Configuring the audio output (Windows)</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../perftips.html">Improve performance of pyo programs</a></li>
</ul>
<ul class="current">
<li class="toctree-l1 current"><a class="reference internal" href="../index.html">API documentation</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="../constants.html">Constants</a></li>
<li class="toctree-l2 current"><a class="reference internal" href="index.html">Functions</a></li>
<li class="toctree-l2"><a class="reference internal" href="../alphabetical.html">Alphabetical class reference</a></li>
<li class="toctree-l2"><a class="reference internal" href="../classes/index.html">Classes by category</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="../../examples/index.html">Examples</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../tutorials/index.html">Advanced tutorials</a></li>
</ul>
<div role="search">
<h3 style="margin-top: 1.5em;">Search</h3>
<form action="../../search.html" class="search" method="get">
<input name="q" type="text"/>
<input type="submit" value="Go"/>
</form>
</div>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<section id="resampling">
<h1>Resampling<a class="headerlink" href="#resampling" title="Permalink to this heading">¶</a></h1>
<p>Functions to modify the sampling rate of an audio file.</p>
<section id="functions-in-this-category">
<h2>Functions in this category<a class="headerlink" href="#functions-in-this-category" title="Permalink to this heading">¶</a></h2>
<ul class="simple">
<li><p><a class="reference internal" href="#pyo.upsamp" title="pyo.upsamp"><code class="xref py py-func docutils literal notranslate"><span class="pre">upsamp()</span></code></a> :     Increases the sampling rate of an audio file.</p></li>
<li><p><a class="reference internal" href="#pyo.downsamp" title="pyo.downsamp"><code class="xref py py-func docutils literal notranslate"><span class="pre">downsamp()</span></code></a> :     Decreases the sampling rate of an audio file.</p></li>
</ul>
</section>
<section id="upsamp">
<h2><em>upsamp</em><a class="headerlink" href="#upsamp" title="Permalink to this heading">¶</a></h2>
<dl class="py function">
<dt class="sig sig-object py" id="pyo.upsamp">
<span class="sig-name descname"><span class="pre">upsamp</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">path</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">outfile</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">up</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">4</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">order</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">128</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/pyo/lib/_core.html#upsamp"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pyo.upsamp" title="Permalink to this definition">¶</a></dt>
<dd><p>Increases the sampling rate of an audio file.</p>
<dl class="field-list simple">
<dt class="field-odd">Args</dt>
<dd class="field-odd"><dl class="simple">
<dt>path: string</dt><dd><p>Full path (including extension) of the audio file to convert.</p>
</dd>
<dt>outfile: string</dt><dd><p>Full path (including extension) of the new file.</p>
</dd>
<dt>up: int, optional</dt><dd><p>Upsampling factor. Defaults to 4.</p>
</dd>
<dt>order: int, optional</dt><dd><p>Length, in samples, of the anti-aliasing lowpass filter.
Defaults to 128.</p>
</dd>
</dl>
</dd>
</dl>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">os</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">home</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">expanduser</span><span class="p">(</span><span class="s1">'~'</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">f</span> <span class="o">=</span> <span class="n">SNDS_PATH</span><span class="o">+</span><span class="s1">'/transparent.aif'</span>
<span class="gp">&gt;&gt;&gt; </span><span class="c1"># upsample a signal 2 times</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">upfile</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">home</span><span class="p">,</span> <span class="s1">'trans_upsamp_2.aif'</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><a class="sphinx-codeautolink-a" href="../../api/functions/sampling.html#pyo.upsamp" title="pyo.upsamp"><span class="n">upsamp</span></a><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">upfile</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">256</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="c1"># downsample the upsampled signal 3 times</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">downfile</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">home</span><span class="p">,</span> <span class="s1">'trans_downsamp_3.aif'</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><a class="sphinx-codeautolink-a" href="../../api/functions/sampling.html#pyo.downsamp" title="pyo.downsamp"><span class="n">downsamp</span></a><span class="p">(</span><span class="n">upfile</span><span class="p">,</span> <span class="n">downfile</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">256</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
</section>
<section id="downsamp">
<h2><em>downsamp</em><a class="headerlink" href="#downsamp" title="Permalink to this heading">¶</a></h2>
<dl class="py function">
<dt class="sig sig-object py" id="pyo.downsamp">
<span class="sig-name descname"><span class="pre">downsamp</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">path</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">outfile</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">down</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">4</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">order</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">128</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../_modules/pyo/lib/_core.html#downsamp"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pyo.downsamp" title="Permalink to this definition">¶</a></dt>
<dd><p>Decreases the sampling rate of an audio file.</p>
<dl class="field-list simple">
<dt class="field-odd">Args</dt>
<dd class="field-odd"><dl class="simple">
<dt>path: string</dt><dd><p>Full path (including extension) of the audio file to convert.</p>
</dd>
<dt>outfile: string</dt><dd><p>Full path (including extension) of the new file.</p>
</dd>
<dt>down: int, optional</dt><dd><p>Downsampling factor. Defaults to 4.</p>
</dd>
<dt>order: int, optional</dt><dd><p>Length, in samples, of the anti-aliasing lowpass filter.
Defaults to 128.</p>
</dd>
</dl>
</dd>
</dl>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">&gt;&gt;&gt; </span><span class="kn">import</span> <span class="nn">os</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">home</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">expanduser</span><span class="p">(</span><span class="s1">'~'</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">f</span> <span class="o">=</span> <span class="n">SNDS_PATH</span><span class="o">+</span><span class="s1">'/transparent.aif'</span>
<span class="gp">&gt;&gt;&gt; </span><span class="c1"># upsample a signal 2 times</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">upfile</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">home</span><span class="p">,</span> <span class="s1">'trans_upsamp_2.aif'</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><a class="sphinx-codeautolink-a" href="../../api/functions/sampling.html#pyo.upsamp" title="pyo.upsamp"><span class="n">upsamp</span></a><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">upfile</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">256</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><span class="c1"># downsample the upsampled signal 3 times</span>
<span class="gp">&gt;&gt;&gt; </span><span class="n">downfile</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">home</span><span class="p">,</span> <span class="s1">'trans_downsamp_3.aif'</span><span class="p">)</span>
<span class="gp">&gt;&gt;&gt; </span><a class="sphinx-codeautolink-a" href="../../api/functions/sampling.html#pyo.downsamp" title="pyo.downsamp"><span class="n">downsamp</span></a><span class="p">(</span><span class="n">upfile</span><span class="p">,</span> <span class="n">downfile</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">256</span><span class="p">)</span>
</pre></div>
</div>
</dd></dl>
</section>
</section>
<div class="clearer"></div>
</div>
</div>
</div>
</div>
<div class="clearer"></div>
</div>
</div>
<div class="footer-wrapper">
<div class="footer">
<div class="left">
<div aria-label="related navigaton" role="navigation">
<a href="sndfile.html" title="Soundfile">previous</a> |
            <a href="conv.html" title="Conversions">next</a> |
            <a href="../../genindex.html" title="General Index">index</a>
</div>
<div aria-label="source link" role="note">
</div>
</div>
<div class="right">
<div class="footer" role="contentinfo">
        © Copyright 2021, Olivier Bélanger.
      Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 5.3.0.
    </div>
</div>
<div class="clearer"></div>
</div>
</div>
</body>
</html>