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

[Ian Shepherd]

This was playing from Apple Music BTW, and from the album so in Album Mode. Presumably using “loudest track” would fix it. However in Track mode it will presumably be worse, in some cases.

On a more positive note, they are obviously actively focusing on audio stuff at the moment, because Atmos, so hopefully it can be fixed !

Ian



> On 19 Jan 2022, at 19:14, Ian Shepherd <ian at mastering-media.co.uk> wrote:
> 
> 
> Even clearer with a larger waveform scale. One step forward… OTOH maybe most classical listeners don’t use Sound Check…?
> 
> 
> <Sound Check DRC.png>
> 
> 
> 
> 
>> On 19 Jan 2022, at 19:11, Ian Shepherd <ian at mastering-media.co.uk <mailto:ian at mastering-media.co.uk>> 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 Check DRC.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
>> 
> 

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