scy<p>I’m looking for an open-source tool to write loop points into <a href="https://chaos.social/tags/WAV" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WAV</span></a> files, for <a href="https://chaos.social/tags/looping" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>looping</span></a> a section of the audio contained in the file.</p><p>By now I know that these are stored as <a href="https://chaos.social/tags/RIFF" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RIFF</span></a> `smpl` chunks (see <a href="https://www.recordingblogs.com/wiki/sample-chunk-of-a-wave-file" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">recordingblogs.com/wiki/sample</span><span class="invisible">-chunk-of-a-wave-file</span></a> for the binary structure), and I could generate the binary data myself, but I need a tool to write the chunk into an existing file. <a href="https://chaos.social/tags/CLI" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CLI</span></a> preferred, or a <a href="https://chaos.social/tags/Python" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Python</span></a> library.</p><p><a href="https://chaos.social/tags/Exiftool" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Exiftool</span></a> &amp; the <a href="https://chaos.social/tags/libsndfile" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>libsndfile</span></a> tools can’t.</p><p><a href="https://chaos.social/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a> <a href="https://chaos.social/tags/audio" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>audio</span></a> <a href="https://chaos.social/tags/musicproduction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>musicproduction</span></a> <a href="https://chaos.social/tags/sampling" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sampling</span></a> <a href="https://chaos.social/tags/DAW" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DAW</span></a> <a href="https://chaos.social/tags/askFedi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>askFedi</span></a> :BoostOK:</p>