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

[Bob Katz]

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:
>
>
>
>
> 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> 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/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/> No trees were killed in the sending of 
this message. However a large number of electrons were terribly 
inconvenienced.
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