[MLA] Spotify’s plans

[Bob Katz]

On 11/4/19 6:38 PM, Kevin Gross wrote:
> Since much of our audio processing is now done in floating point, I 
> don't think clipping at the encoder is that big of an issue anymore. 
> The problem is with the decoder which can produce higher peak levels 
> than the signal sent into the encoder and that can cause clipping in 
> the conversion to fixed point going to your DAC.


If the encoder is driven with a sufficiently low signal, then the 
decoder will not clip. And that's a form of protection worth doing 
considering what might not be done well on the decode end.


Bob



>
> Kevin Gross - AVA Networks
>
>
> On Mon, Nov 4, 2019 at 10:45 AM Bob Katz <bobkatz at digido.com 
> <mailto:bobkatz at digido.com>> wrote:
>
>     Even if a master is softer than the highest target it could
>     benefit from attenuation to avoid codec clipping. If attenuation
>     to avoid codec clipping is their motivation then they could
>     measure the max true peak level and decide to attenuate based on
>     that criterion.
>
>
>     Bob
>
>
>
>     On 11/3/19 6:10 AM, Grimm | Eelco wrote:
>>>
>>>     Why don't they just attenuate every song 3 dB and add metadata.
>>>
>>
>>     Because they don’t want to attenuate soft tracks that do not
>>     benefit from attenuation. In other words: if your master is
>>     softer than the highest target, they will not touch its original
>>     audio data.
>>
>>     Cheers,
>>     Eelco
>>>
>>>
>>>     Since they're planning on using metadata all the time in every
>>>     player then there's no reason to prenormalize any piece to any
>>>     target. They didn't get any advantage anyway.
>>>
>>>
>>>
>>>     Bob
>>>
>>>
>>>     -- 
>>>     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
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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 <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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-- 

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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