<div dir="ltr">As Thomas would tell you, the same concern exists for driving a DAC. I beleive fixed-point decode is also still common. This is also what the EBU 128 -2 dBTP recommendation is about.<div><br></div><div>If you're going to be doing lossy compression, I guess you don't need to be worried about losing bit transparency by attenuating first.<br><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Kevin Gross - AVA Networks</div></div></div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Nov 5, 2019 at 10:57 AM Bob Katz <<a href="mailto:bobkatz@digido.com">bobkatz@digido.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p><br>
</p>
<div>On 11/4/19 6:38 PM, Kevin Gross wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Since much of our audio processing is now done in
floating point, I don't think clipping at the encoder is that
big of an issue anymore. The problem is with the decoder which
can produce higher peak levels than the signal sent into the
encoder and that can cause clipping in the conversion to fixed
point going to your DAC.</div>
</blockquote>
<p><br>
</p>
<p>If the encoder is driven with a sufficiently low signal, then the
decoder will not clip. And that's a form of protection worth doing
considering what might not be done well on the decode end.</p>
<p><br>
</p>
<p>Bob</p>
<br>
<p><br>
</p>
<blockquote type="cite">
<div dir="ltr">
<div><br clear="all">
<div>
<div dir="ltr">
<div dir="ltr">Kevin Gross - AVA Networks</div>
</div>
</div>
<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Nov 4, 2019 at 10:45
AM Bob Katz <<a href="mailto:bobkatz@digido.com" target="_blank">bobkatz@digido.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Even if a master is softer than the highest target it
could benefit from attenuation to avoid codec clipping. If
attenuation to avoid codec clipping is their motivation
then they could measure the max true peak level and decide
to attenuate based on that criterion.</p>
<p><br>
</p>
<p>Bob</p>
<p><br>
</p>
<p><br>
</p>
<div>On 11/3/19 6:10 AM, Grimm | Eelco wrote:<br>
</div>
<blockquote type="cite">
<div>
<blockquote type="cite">
<div>
<div bgcolor="#FFFFFF">
<p>Why don't they just attenuate every song 3 dB
and add metadata. <br>
</p>
</div>
</div>
</blockquote>
<div><br>
</div>
<div>Because they don’t want to attenuate soft tracks
that do not benefit from attenuation. In other words:
if your master is softer than the highest target, they
will not touch its original audio data.</div>
<div><br>
</div>
Cheers,</div>
<div>Eelco<br>
<blockquote type="cite">
<div>
<div bgcolor="#FFFFFF">
<p> </p>
<p><br>
</p>
<p>Since they're planning on using metadata all
the time in every player then there's no reason
to prenormalize any piece to any target. They
didn't get any advantage anyway. <br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>Bob</p>
<br>
<blockquote type="cite"> </blockquote>
<div>-- <br>
<pre><font face="3D"Courier"">
If you want good sound on your album, come to
Bob Katz 407-831-0233 DIGITAL DOMAIN MASTERING STUDIO
Author: <b>Mastering Audio</b>
<a href="https://www.digido.com/" target="_blank">Digital Domain Website</a>
No trees were killed in the sending of this message. However a large number
of electrons were terribly inconvenienced.</font>
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If you want good sound on your album, come to
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Author: <b>Mastering Audio</b>
<a href="https://www.digido.com/" target="_blank">Digital Domain Website</a>
No trees were killed in the sending of this message. However a large number
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<pre><font face="3D"Courier"">
If you want good sound on your album, come to
Bob Katz 407-831-0233 DIGITAL DOMAIN MASTERING STUDIO
Author: <b>Mastering Audio</b>
<a href="https://www.digido.com/" target="_blank">Digital Domain Website</a>
No trees were killed in the sending of this message. However a large number
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