[MLA] Apple seems to have turned Soundcheck ON by default...

[Grimm | Eelco]

Hi Ian,

This is actually something important to report to Buddy. He’s looking for data to convince his people from adopting Album Normalization ’td1008 style’ in stead of the ‘average loudness’ style that’s currently implemented. So indeed, if you can give us the PLR of each version we can send a clear text to him.

Thanks!

Cheers,
Eelco

> On 19 Jan 2022, at 21:58, Bob Katz <bobkatz at digido.com> wrote:
> 
> Oy, that's bad. Sound Check is not supposed to implement DRC. Please Measure the PLR of each version. That would tell us something to tell Buddy about if it's happening.
> 
> I'm not subscribed to Apple Music. It's just one more service I don't want to pay for. If I sign in, can I download this one album without beig forced to be a subscriber?
> 
> 
> 
> Bob
> 
> 
> 
> On 1/19/22 2:11 PM, Ian Shepherd wrote:
>> 
>> Confirmed, sadly - iPhone 11 with iOS 15.1 has pretty blatant DRC happening, monitored via a lightning-to-analogue converter. 
>> 
>> It’s pretty aggressive so I hesitate to call it limiting - here are the waveforms for Sound Check Off (top) and On, level-matched by ear:
>> 
>> 
>> <Sound%20Check%20DRC.png>
>> 
>> 
>> This is about 1:30 into the first Track of “On Christmas Day” 😕
>> 
>> Ian
>> 
>> 
>> 
>> 
>>> On 19 Jan 2022, at 16:54, Ian Shepherd <ian at mastering-media.co.uk <mailto:ian at mastering-media.co.uk>> wrote:
>>> 
>>> 
>>> Hi Bob,
>>>> Ian, in your copious free time 
>>>> 
>>> You’re hilarious 😂
>>>> you should capture both ways. If you detect anything other than just a gain shift, then we should alert Buddy and maybe he can get that changed.
>>>> 
>>>> And in fact, if you can give me links to that choral music I'd like to check it and measure it
>>>> 
>>> 
>>> 
>>> It was one or other of these albums, possibly both:
>>> 
>>> https://music.apple.com/gb/album/hodie-an-english-christmas-collection-re-mastered/73233052 <https://music.apple.com/gb/album/hodie-an-english-christmas-collection-re-mastered/73233052>
>>> 
>>> https://music.apple.com/gb/album/on-christmas-day/695609721 <https://music.apple.com/gb/album/on-christmas-day/695609721>
>>> 
>>> (Both are beautiful BTW, although I prefer Britten’s Ceremony sung by a boys' choir rather than adults)
>>> 
>>> I just previewed the first track of “Hodie" and it has a +9 Sound Check value using iTunes in Mojave, which takes it to +0.1 dBFS @ 2:54 and sure enough it clips audibly, so no limiting in this case.
>>> 
>>> Ah hell, now I’m going to have to check it on iPhone…!
>>> 
>>> Ian
>> 
> -- 
> 
> 
> 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 <https://www.digido.com/>
> 
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