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-
- <h3>Summary</h3>
- <p>Play a RAW data file, stored on a SD card. RAW format is simpler
- than WAV and begins playing immediately, without parsing WAV file
- header info.</p>
- <h3>Audio Connections</h3>
- <table class=doc align=center cellpadding=3>
- <tr class=top><th>Port</th><th>Purpose</th></tr>
- <tr class=odd><td align=center>Out 0</td><td>Sound Output</td></tr>
- </table>
- <h3>Functions</h3>
- <p class=func><span class=keyword>play</span>(filename);</p>
- <p class=desc>Begin playing a RAW data file. If a file is already playing,
- it is stopped and this file starts playing from the beginning.
- </p>
- <p class=func><span class=keyword>stop</span>();</p>
- <p class=desc>Stop playing. If not playing, this function has no effect.
- </p>
- <p class=func><span class=keyword>isPlaying</span>();</p>
- <p class=desc>Return true (non-zero) if playing, or false (zero)
- when not playing.
- </p>
- <p class=func><span class=keyword>positionMillis</span>();</p>
- <p class=desc>While playing, return the current time offset, in
- milliseconds. When not playing, the return from this function
- is undefined.
- </p>
- <p class=func><span class=keyword>lengthMillis</span>();</p>
- <p class=desc>Return the total length of the current sound clip,
- in milliseconds. When not playing, the return from this function
- is undefined.
- </p>
- <h3>Examples</h3>
- <p class=exam>File > Examples > Audio > Recorder
- </p>
- <h3>Notes</h3>
- <p>The data file must be RAW 16 bit signed integers in LSB-first format.
- </p>
- <p>While playing, the audio library accesses the SD card automatically.
- If card access is required, you must
- <a href="http://www.pjrc.com/teensy/td_libs_AudioProcessorUsage.html" target="_blank">AudioNoInterrupts()</a>
- to prevent the library from accessing the SD card while you use it.
- Disabling the audio library interrupt for too long may cause audible
- dropouts or glitches.
- </p>
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