[MLA] Fwd: iOS 11 Music app normalisation now uses floating point target

[Bob Katz]

Floating point is great news.

Do you have any news on Tidal and album norm?


Looks like by the time Irma reaches Orlando she will be a category 2 so 
hopefully not a catastrophic event for this region. But I feel very 
sorry for Miami... looks like it's going to be a direct hit and the 
worst story ever to hit Miami.

:-(

Bob K


On 9/6/17 4:52 PM, Grimm | Eelco wrote:
> Hi MLA friends,
>
> 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!
>
> I hope to see you all in New York!
>
> And Bob Katz, best of luck with Irma...
>
> All the best,
> Eelco
>
>
> Begin forwarded message:
>
>> *From: *Mikko Lohenoja <mikko.lohenoja at yle.fi 
>> <mailto:mikko.lohenoja at yle.fi>>
>> *Subject: **[FAR-PLOUD] iOS 11 Music app normalisation now uses 
>> floating point target*
>> *Date: *6 september 2017 14:22:00 CEST
>> *To: *"PLOUD (far-ploud at list.ebu.ch <mailto:far-ploud at list.ebu.ch>)" 
>> <far-ploud at list.ebu.ch <mailto:far-ploud at list.ebu.ch>>
>>
>> Dear all,
>>
>> 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.
>>
>> 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.
>>
>> 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.
>>
>> 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.
>>
>> 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.
>>
>> Let's hope this is a good step for the loudness normalisation in 
>> other apps too.
>>
>> All the best,
>> Mikko
>>
>> -- 
>> Mikko Lohenoja
>> Äänisuunnittelija / Sound Designer
>> Yle-Keskus, Mediatalo
>> Uutiskatu 5, Helsinki, Finland
>> PL 10, 00024 YLEISRADIO
>> tel. +358 406593292
>>
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>
>
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-- 

If you want good sound on your album, come to Bob Katz 407-831-0233 
DIGITAL DOMAIN MASTERING STUDIO Author: *Mastering Audio *Digital Domain 
Website <http://www.digido.com/> No trees were killed in the sending of 
this message. However a large number of electrons were terribly 
inconvenienced.

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