<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi MLA friends,<div><br></div><div>This news was shared on the PLOUD list. On the one hand I thought that iOS was already working in this way, but on the other hand it is very good news that Apple has changed this!</div><div><br></div><div>I hope to see you all in New York!</div><div><br></div><div>And Bob Katz, best of luck with Irma...</div><div><br></div><div>All the best,</div><div>Eelco</div><div><br><div><br><div>Begin forwarded message:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>From: </b></span><span style="font-family:'Helvetica';">Mikko Lohenoja <<a href="mailto:mikko.lohenoja@yle.fi">mikko.lohenoja@yle.fi</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Subject: </b></span><span style="font-family:'Helvetica';"><b>[FAR-PLOUD] iOS 11 Music app normalisation now uses floating point target</b><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>Date: </b></span><span style="font-family:'Helvetica';">6 september 2017 14:22:00 CEST<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; color:rgba(0, 0, 0, 1.0);"><b>To: </b></span><span style="font-family:'Helvetica';">"PLOUD (<a href="mailto:far-ploud@list.ebu.ch">far-ploud@list.ebu.ch</a>)" <<a href="mailto:far-ploud@list.ebu.ch">far-ploud@list.ebu.ch</a>><br></span></div><br><div><div dir="ltr">Dear all,<div><br></div><div>I am running Apple's iOS 11 Beta on my phone, and I discovered that the manufacturer has made a good step in loudness normalisation architecture.</div><div><br></div><div>I have understood that previous versions of the iOS operating system have used fixed point architecture and therefore it was important to not exceed peaks before the device volume control stage. This led to the problem that apps had to run hot if the user volume control was low.</div><div><br></div><div>Now in iOS 11 it is possible to run an overmodulated signal through the dedicated Music app without any distortion, which means there's a floating point architecture.</div><div><br></div><div>There's still a limitation of the adjustment range, and of course the algorithm is still not ITU BS.1770. It is only possible to adjust a file within -12 to +12 dB's. But with a floating point architecture, this is actually not a problem, because you can adjust very quiet material to a louder floating point target than it would have been possible "straight in the file". The range should still be a little wider to cover all the material.</div><div><br></div><div>Music app still addresses the peaks by default, and it is not possible to exceed 0dBFS with its initial setting but it was possible to test this by overwriting the audio file iTunes normalisation metadata which contains the peak and loudness information.</div><div><br></div><div>Let's hope this is a good step for the loudness normalisation in other apps too.</div><div><br></div><div>All the best,</div><div>Mikko</div><div><br></div><div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Mikko Lohenoja<br></div><div>Äänisuunnittelija / Sound Designer</div><div>Yle-Keskus, Mediatalo</div><div>Uutiskatu 5, Helsinki, Finland</div><div>PL 10, 00024 YLEISRADIO</div><div>tel. +358 406593292</div></div></div></div></div></div></div></div></div></div>
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