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</html><thumbnail_url>https://www.pschatzmann.ch/wp-content/uploads/2025/06/m4a.jpeg</thumbnail_url><thumbnail_width>196</thumbnail_width><thumbnail_height>257</thumbnail_height><description>In my last blog, I described you I added M4A support to my Arduino Audio Tools project and how to use it. As highlited we need to access and store the stsz size tabe to play back the audio: a typical size table contains aournd 40 &#x2013; 80 kbytes, but [&hellip;]</description></oembed>
