Re: [LAU] How bad is mp3/ogg

Hi Atte,

if you already mentioned Massenburg,
he makes some high quality (and high price tag) analog devices mostly used
by mastering engineers.
He "should" know his stuff.

It happens to be that just today I came across this vid of Bob Katz (a well
known mastering engineer),
he uses the mp3 artifacts too but with a different purpose.

http://www.youtube.com/watch?v=8EgamkLkXW8&feature=related

Hope you find it interesting.
Moshe

On Tue, Oct 11, 2011 at 11:42 PM, Atte André Jensen <atte@email-addr-hidden> wrote:

> On 10/11/2011 11:36 PM, Fons Adriaensen wrote:
>
> There are at least two good reasons why such a test is
>> not valid.
>>
>> 1. The difference signal doesn't tell you anything about
>> audible differences between two signals. It's fairly easy
>> to make a linear filter (no compression involved) with
>> a perfectly flat response and that nobody would be able
>> to hear. But when you take the difference between in and
>> out it is 3 dB higher than both.
>>
>> 2. Lossy compression is based on combined temporal and
>> spectral masking - some signals you can't hear in the
>> presence of others. Of course when you take away the
>> masking signal they become apparent...
>>
>
> Makes a lot of sense, thanks!
>
> BTW: Apparently the guy in the link has lifted the idea from this clip:
>
> http://www.youtube.com/watch?**v=wzJbjHc6bRE<http://www.youtube.com/watch?v=wzJbjHc6bRE>
>
> where George Massenburg does the same. I don't know George Massenburg, but
> he supposedly is some kine of authority in the world of audio engineering.
> Not that it makes the test more valid...
>
>
> --
> Atte
>
> http://atte.dk http://modlys.dk
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Received on Wed Oct 12 04:15:02 2011