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

[Ian Shepherd]

Even clearer with a larger waveform scale. One step forward… OTOH maybe most classical listeners don’t use Sound Check…?







> On 19 Jan 2022, at 19:11, Ian Shepherd <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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