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  193.   <section id="module-sunau">

  194. <span id="sunau-read-and-write-sun-au-files"></span><h1><a class="reference internal" href="#module-sunau" title="sunau: Provide an interface to the Sun AU sound format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sunau</span></code></a> — Read and write Sun AU files<a class="headerlink" href="#module-sunau" title="Link to this heading">¶</a></h1>

  195. <p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.12/Lib/sunau.py">Lib/sunau.py</a></p>

  196. <div class="deprecated-removed">

  197. <p><span class="versionmodified">Deprecated since version 3.11, will be removed in version 3.13: </span>The <a class="reference internal" href="#module-sunau" title="sunau: Provide an interface to the Sun AU sound format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sunau</span></code></a> module is deprecated

  198. (see <span class="target" id="index-0"></span><a class="pep reference external" href="https://peps.python.org/pep-0594/#sunau"><strong>PEP 594</strong></a> for details).</p>

  199. </div>

  200. <hr class="docutils" />

  201. <p>The <a class="reference internal" href="#module-sunau" title="sunau: Provide an interface to the Sun AU sound format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sunau</span></code></a> module provides a convenient interface to the Sun AU sound

  202. format.  Note that this module is interface-compatible with the modules

  203. <a class="reference internal" href="aifc.html#module-aifc" title="aifc: Read and write audio files in AIFF or AIFC format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">aifc</span></code></a> and <a class="reference internal" href="wave.html#module-wave" title="wave: Provide an interface to the WAV sound format."><code class="xref py py-mod docutils literal notranslate"><span class="pre">wave</span></code></a>.</p>

  204. <p>An audio file consists of a header followed by the data.  The fields of the

  205. header are:</p>

  206. <table class="docutils align-default">

  207. <thead>

  208. <tr class="row-odd"><th class="head"><p>Field</p></th>

  209. <th class="head"><p>Contents</p></th>

  210. </tr>

  211. </thead>

  212. <tbody>

  213. <tr class="row-even"><td><p>magic word</p></td>

  214. <td><p>The four bytes <code class="docutils literal notranslate"><span class="pre">.snd</span></code>.</p></td>

  215. </tr>

  216. <tr class="row-odd"><td><p>header size</p></td>

  217. <td><p>Size of the header, including info, in bytes.</p></td>

  218. </tr>

  219. <tr class="row-even"><td><p>data size</p></td>

  220. <td><p>Physical size of the data, in bytes.</p></td>

  221. </tr>

  222. <tr class="row-odd"><td><p>encoding</p></td>

  223. <td><p>Indicates how the audio samples are encoded.</p></td>

  224. </tr>

  225. <tr class="row-even"><td><p>sample rate</p></td>

  226. <td><p>The sampling rate.</p></td>

  227. </tr>

  228. <tr class="row-odd"><td><p># of channels</p></td>

  229. <td><p>The number of channels in the samples.</p></td>

  230. </tr>

  231. <tr class="row-even"><td><p>info</p></td>

  232. <td><p>ASCII string giving a description of the

  233. audio file (padded with null bytes).</p></td>

  234. </tr>

  235. </tbody>

  236. </table>

  237. <p>Apart from the info field, all header fields are 4 bytes in size. They are all

  238. 32-bit unsigned integers encoded in big-endian byte order.</p>

  239. <p>The <a class="reference internal" href="#module-sunau" title="sunau: Provide an interface to the Sun AU sound format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sunau</span></code></a> module defines the following functions:</p>

  240. <dl class="py function">

  241. <dt class="sig sig-object py" id="sunau.open">

  242. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">open</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">file</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">mode</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.open" title="Link to this definition">¶</a></dt>

  243. <dd><p>If <em>file</em> is a string, open the file by that name, otherwise treat it as a

  244. seekable file-like object. <em>mode</em> can be any of</p>

  245. <dl class="simple">

  246. <dt><code class="docutils literal notranslate"><span class="pre">'r'</span></code></dt><dd><p>Read only mode.</p>

  247. </dd>

  248. <dt><code class="docutils literal notranslate"><span class="pre">'w'</span></code></dt><dd><p>Write only mode.</p>

  249. </dd>

  250. </dl>

  251. <p>Note that it does not allow read/write files.</p>

  252. <p>A <em>mode</em> of <code class="docutils literal notranslate"><span class="pre">'r'</span></code> returns an <code class="xref py py-class docutils literal notranslate"><span class="pre">AU_read</span></code> object, while a <em>mode</em> of <code class="docutils literal notranslate"><span class="pre">'w'</span></code>

  253. or <code class="docutils literal notranslate"><span class="pre">'wb'</span></code> returns an <code class="xref py py-class docutils literal notranslate"><span class="pre">AU_write</span></code> object.</p>

  254. </dd></dl>

  255. 

  256. <p>The <a class="reference internal" href="#module-sunau" title="sunau: Provide an interface to the Sun AU sound format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sunau</span></code></a> module defines the following exception:</p>

  257. <dl class="py exception">

  258. <dt class="sig sig-object py" id="sunau.Error">

  259. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">Error</span></span><a class="headerlink" href="#sunau.Error" title="Link to this definition">¶</a></dt>

  260. <dd><p>An error raised when something is impossible because of Sun AU specs or

  261. implementation deficiency.</p>

  262. </dd></dl>

  263. 

  264. <p>The <a class="reference internal" href="#module-sunau" title="sunau: Provide an interface to the Sun AU sound format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">sunau</span></code></a> module defines the following data items:</p>

  265. <dl class="py data">

  266. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_MAGIC">

  267. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_MAGIC</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_MAGIC" title="Link to this definition">¶</a></dt>

  268. <dd><p>An integer every valid Sun AU file begins with, stored in big-endian form.  This

  269. is the string <code class="docutils literal notranslate"><span class="pre">.snd</span></code> interpreted as an integer.</p>

  270. </dd></dl>

  271. 

  272. <dl class="py data">

  273. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_MULAW_8">

  274. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_MULAW_8</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_MULAW_8" title="Link to this definition">¶</a></dt>

  275. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_LINEAR_8">

  276. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_LINEAR_8</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_LINEAR_8" title="Link to this definition">¶</a></dt>

  277. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_LINEAR_16">

  278. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_LINEAR_16</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_LINEAR_16" title="Link to this definition">¶</a></dt>

  279. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_LINEAR_24">

  280. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_LINEAR_24</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_LINEAR_24" title="Link to this definition">¶</a></dt>

  281. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_LINEAR_32">

  282. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_LINEAR_32</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_LINEAR_32" title="Link to this definition">¶</a></dt>

  283. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_ALAW_8">

  284. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_ALAW_8</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_ALAW_8" title="Link to this definition">¶</a></dt>

  285. <dd><p>Values of the encoding field from the AU header which are supported by this

  286. module.</p>

  287. </dd></dl>

  288. 

  289. <dl class="py data">

  290. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_FLOAT">

  291. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_FLOAT</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_FLOAT" title="Link to this definition">¶</a></dt>

  292. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_DOUBLE">

  293. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_DOUBLE</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_DOUBLE" title="Link to this definition">¶</a></dt>

  294. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_ADPCM_G721">

  295. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_ADPCM_G721</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_ADPCM_G721" title="Link to this definition">¶</a></dt>

  296. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_ADPCM_G722">

  297. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_ADPCM_G722</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_ADPCM_G722" title="Link to this definition">¶</a></dt>

  298. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_ADPCM_G723_3">

  299. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_ADPCM_G723_3</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_ADPCM_G723_3" title="Link to this definition">¶</a></dt>

  300. <dt class="sig sig-object py" id="sunau.AUDIO_FILE_ENCODING_ADPCM_G723_5">

  301. <span class="sig-prename descclassname"><span class="pre">sunau.</span></span><span class="sig-name descname"><span class="pre">AUDIO_FILE_ENCODING_ADPCM_G723_5</span></span><a class="headerlink" href="#sunau.AUDIO_FILE_ENCODING_ADPCM_G723_5" title="Link to this definition">¶</a></dt>

  302. <dd><p>Additional known values of the encoding field from the AU header, but which are

  303. not supported by this module.</p>

  304. </dd></dl>

  305. 

  306. <section id="au-read-objects">

  307. <span id="id1"></span><h2>AU_read Objects<a class="headerlink" href="#au-read-objects" title="Link to this heading">¶</a></h2>

  308. <p>AU_read objects, as returned by <a class="reference internal" href="#sunau.open" title="sunau.open"><code class="xref py py-func docutils literal notranslate"><span class="pre">open()</span></code></a> above, have the following methods:</p>

  309. <dl class="py method">

  310. <dt class="sig sig-object py" id="sunau.AU_read.close">

  311. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">close</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.close" title="Link to this definition">¶</a></dt>

  312. <dd><p>Close the stream, and make the instance unusable. (This is  called automatically

  313. on deletion.)</p>

  314. </dd></dl>

  315. 

  316. <dl class="py method">

  317. <dt class="sig sig-object py" id="sunau.AU_read.getnchannels">

  318. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getnchannels</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getnchannels" title="Link to this definition">¶</a></dt>

  319. <dd><p>Returns number of audio channels (1 for mono, 2 for stereo).</p>

  320. </dd></dl>

  321. 

  322. <dl class="py method">

  323. <dt class="sig sig-object py" id="sunau.AU_read.getsampwidth">

  324. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getsampwidth</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getsampwidth" title="Link to this definition">¶</a></dt>

  325. <dd><p>Returns sample width in bytes.</p>

  326. </dd></dl>

  327. 

  328. <dl class="py method">

  329. <dt class="sig sig-object py" id="sunau.AU_read.getframerate">

  330. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getframerate</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getframerate" title="Link to this definition">¶</a></dt>

  331. <dd><p>Returns sampling frequency.</p>

  332. </dd></dl>

  333. 

  334. <dl class="py method">

  335. <dt class="sig sig-object py" id="sunau.AU_read.getnframes">

  336. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getnframes</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getnframes" title="Link to this definition">¶</a></dt>

  337. <dd><p>Returns number of audio frames.</p>

  338. </dd></dl>

  339. 

  340. <dl class="py method">

  341. <dt class="sig sig-object py" id="sunau.AU_read.getcomptype">

  342. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getcomptype</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getcomptype" title="Link to this definition">¶</a></dt>

  343. <dd><p>Returns compression type. Supported compression types are <code class="docutils literal notranslate"><span class="pre">'ULAW'</span></code>, <code class="docutils literal notranslate"><span class="pre">'ALAW'</span></code>

  344. and <code class="docutils literal notranslate"><span class="pre">'NONE'</span></code>.</p>

  345. </dd></dl>

  346. 

  347. <dl class="py method">

  348. <dt class="sig sig-object py" id="sunau.AU_read.getcompname">

  349. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getcompname</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getcompname" title="Link to this definition">¶</a></dt>

  350. <dd><p>Human-readable version of <a class="reference internal" href="#sunau.AU_read.getcomptype" title="sunau.AU_read.getcomptype"><code class="xref py py-meth docutils literal notranslate"><span class="pre">getcomptype()</span></code></a>.  The supported types have the

  351. respective names <code class="docutils literal notranslate"><span class="pre">'CCITT</span> <span class="pre">G.711</span> <span class="pre">u-law'</span></code>, <code class="docutils literal notranslate"><span class="pre">'CCITT</span> <span class="pre">G.711</span> <span class="pre">A-law'</span></code> and <code class="docutils literal notranslate"><span class="pre">'not</span>

  352. <span class="pre">compressed'</span></code>.</p>

  353. </dd></dl>

  354. 

  355. <dl class="py method">

  356. <dt class="sig sig-object py" id="sunau.AU_read.getparams">

  357. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getparams</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getparams" title="Link to this definition">¶</a></dt>

  358. <dd><p>Returns a <a class="reference internal" href="collections.html#collections.namedtuple" title="collections.namedtuple"><code class="xref py py-func docutils literal notranslate"><span class="pre">namedtuple()</span></code></a> <code class="docutils literal notranslate"><span class="pre">(nchannels,</span> <span class="pre">sampwidth,</span>

  359. <span class="pre">framerate,</span> <span class="pre">nframes,</span> <span class="pre">comptype,</span> <span class="pre">compname)</span></code>, equivalent to output of the

  360. <code class="xref py py-meth docutils literal notranslate"><span class="pre">get*()</span></code> methods.</p>

  361. </dd></dl>

  362. 

  363. <dl class="py method">

  364. <dt class="sig sig-object py" id="sunau.AU_read.readframes">

  365. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">readframes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">n</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.readframes" title="Link to this definition">¶</a></dt>

  366. <dd><p>Reads and returns at most <em>n</em> frames of audio, as a <a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a> object.  The data

  367. will be returned in linear format.  If the original data is in u-LAW format, it

  368. will be converted.</p>

  369. </dd></dl>

  370. 

  371. <dl class="py method">

  372. <dt class="sig sig-object py" id="sunau.AU_read.rewind">

  373. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">rewind</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.rewind" title="Link to this definition">¶</a></dt>

  374. <dd><p>Rewind the file pointer to the beginning of the audio stream.</p>

  375. </dd></dl>

  376. 

  377. <p>The following two methods define a term “position” which is compatible between

  378. them, and is otherwise implementation dependent.</p>

  379. <dl class="py method">

  380. <dt class="sig sig-object py" id="sunau.AU_read.setpos">

  381. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">setpos</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">pos</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.setpos" title="Link to this definition">¶</a></dt>

  382. <dd><p>Set the file pointer to the specified position.  Only values returned from

  383. <a class="reference internal" href="#sunau.AU_read.tell" title="sunau.AU_read.tell"><code class="xref py py-meth docutils literal notranslate"><span class="pre">tell()</span></code></a> should be used for <em>pos</em>.</p>

  384. </dd></dl>

  385. 

  386. <dl class="py method">

  387. <dt class="sig sig-object py" id="sunau.AU_read.tell">

  388. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">tell</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.tell" title="Link to this definition">¶</a></dt>

  389. <dd><p>Return current file pointer position.  Note that the returned value has nothing

  390. to do with the actual position in the file.</p>

  391. </dd></dl>

  392. 

  393. <p>The following two functions are defined for compatibility with the  <a class="reference internal" href="aifc.html#module-aifc" title="aifc: Read and write audio files in AIFF or AIFC format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">aifc</span></code></a>,

  394. and don’t do anything interesting.</p>

  395. <dl class="py method">

  396. <dt class="sig sig-object py" id="sunau.AU_read.getmarkers">

  397. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getmarkers</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getmarkers" title="Link to this definition">¶</a></dt>

  398. <dd><p>Returns <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>

  399. </dd></dl>

  400. 

  401. <dl class="py method">

  402. <dt class="sig sig-object py" id="sunau.AU_read.getmark">

  403. <span class="sig-prename descclassname"><span class="pre">AU_read.</span></span><span class="sig-name descname"><span class="pre">getmark</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">id</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_read.getmark" title="Link to this definition">¶</a></dt>

  404. <dd><p>Raise an error.</p>

  405. </dd></dl>

  406. 

  407. </section>

  408. <section id="au-write-objects">

  409. <span id="id2"></span><h2>AU_write Objects<a class="headerlink" href="#au-write-objects" title="Link to this heading">¶</a></h2>

  410. <p>AU_write objects, as returned by <a class="reference internal" href="#sunau.open" title="sunau.open"><code class="xref py py-func docutils literal notranslate"><span class="pre">open()</span></code></a> above, have the following methods:</p>

  411. <dl class="py method">

  412. <dt class="sig sig-object py" id="sunau.AU_write.setnchannels">

  413. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">setnchannels</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">n</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.setnchannels" title="Link to this definition">¶</a></dt>

  414. <dd><p>Set the number of channels.</p>

  415. </dd></dl>

  416. 

  417. <dl class="py method">

  418. <dt class="sig sig-object py" id="sunau.AU_write.setsampwidth">

  419. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">setsampwidth</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">n</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.setsampwidth" title="Link to this definition">¶</a></dt>

  420. <dd><p>Set the sample width (in bytes.)</p>

  421. <div class="versionchanged">

  422. <p><span class="versionmodified changed">Changed in version 3.4: </span>Added support for 24-bit samples.</p>

  423. </div>

  424. </dd></dl>

  425. 

  426. <dl class="py method">

  427. <dt class="sig sig-object py" id="sunau.AU_write.setframerate">

  428. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">setframerate</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">n</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.setframerate" title="Link to this definition">¶</a></dt>

  429. <dd><p>Set the frame rate.</p>

  430. </dd></dl>

  431. 

  432. <dl class="py method">

  433. <dt class="sig sig-object py" id="sunau.AU_write.setnframes">

  434. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">setnframes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">n</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.setnframes" title="Link to this definition">¶</a></dt>

  435. <dd><p>Set the number of frames. This can be later changed, when and if more  frames

  436. are written.</p>

  437. </dd></dl>

  438. 

  439. <dl class="py method">

  440. <dt class="sig sig-object py" id="sunau.AU_write.setcomptype">

  441. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">setcomptype</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">type</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">name</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.setcomptype" title="Link to this definition">¶</a></dt>

  442. <dd><p>Set the compression type and description. Only <code class="docutils literal notranslate"><span class="pre">'NONE'</span></code> and <code class="docutils literal notranslate"><span class="pre">'ULAW'</span></code> are

  443. supported on output.</p>

  444. </dd></dl>

  445. 

  446. <dl class="py method">

  447. <dt class="sig sig-object py" id="sunau.AU_write.setparams">

  448. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">setparams</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">tuple</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.setparams" title="Link to this definition">¶</a></dt>

  449. <dd><p>The <em>tuple</em> should be <code class="docutils literal notranslate"><span class="pre">(nchannels,</span> <span class="pre">sampwidth,</span> <span class="pre">framerate,</span> <span class="pre">nframes,</span> <span class="pre">comptype,</span>

  450. <span class="pre">compname)</span></code>, with values valid for the <code class="xref py py-meth docutils literal notranslate"><span class="pre">set*()</span></code> methods.  Set all

  451. parameters.</p>

  452. </dd></dl>

  453. 

  454. <dl class="py method">

  455. <dt class="sig sig-object py" id="sunau.AU_write.tell">

  456. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">tell</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.tell" title="Link to this definition">¶</a></dt>

  457. <dd><p>Return current position in the file, with the same disclaimer for the

  458. <a class="reference internal" href="#sunau.AU_read.tell" title="sunau.AU_read.tell"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AU_read.tell()</span></code></a> and <a class="reference internal" href="#sunau.AU_read.setpos" title="sunau.AU_read.setpos"><code class="xref py py-meth docutils literal notranslate"><span class="pre">AU_read.setpos()</span></code></a> methods.</p>

  459. </dd></dl>

  460. 

  461. <dl class="py method">

  462. <dt class="sig sig-object py" id="sunau.AU_write.writeframesraw">

  463. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">writeframesraw</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.writeframesraw" title="Link to this definition">¶</a></dt>

  464. <dd><p>Write audio frames, without correcting <em>nframes</em>.</p>

  465. <div class="versionchanged">

  466. <p><span class="versionmodified changed">Changed in version 3.4: </span>Any <a class="reference internal" href="../glossary.html#term-bytes-like-object"><span class="xref std std-term">bytes-like object</span></a> is now accepted.</p>

  467. </div>

  468. </dd></dl>

  469. 

  470. <dl class="py method">

  471. <dt class="sig sig-object py" id="sunau.AU_write.writeframes">

  472. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">writeframes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">data</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.writeframes" title="Link to this definition">¶</a></dt>

  473. <dd><p>Write audio frames and make sure <em>nframes</em> is correct.</p>

  474. <div class="versionchanged">

  475. <p><span class="versionmodified changed">Changed in version 3.4: </span>Any <a class="reference internal" href="../glossary.html#term-bytes-like-object"><span class="xref std std-term">bytes-like object</span></a> is now accepted.</p>

  476. </div>

  477. </dd></dl>

  478. 

  479. <dl class="py method">

  480. <dt class="sig sig-object py" id="sunau.AU_write.close">

  481. <span class="sig-prename descclassname"><span class="pre">AU_write.</span></span><span class="sig-name descname"><span class="pre">close</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#sunau.AU_write.close" title="Link to this definition">¶</a></dt>

  482. <dd><p>Make sure <em>nframes</em> is correct, and close the file.</p>

  483. <p>This method is called upon deletion.</p>

  484. </dd></dl>

  485. 

  486. <p>Note that it is invalid to set any parameters after calling  <code class="xref py py-meth docutils literal notranslate"><span class="pre">writeframes()</span></code>

  487. or <code class="xref py py-meth docutils literal notranslate"><span class="pre">writeframesraw()</span></code>.</p>

  488. </section>

  489. </section>

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