In article , Iain Churches
wrote:

I am very happy that for the music in which I am most interested,
Baroque and early Jazz, the finished mix master is used for CD
production without being subjected to "mastering enhancement"

I have some very good audio clips (no pun intended!) of the various
stages in mastering, including what is commonly known as "impact" and
"spread", and multiband compression with EQ.

Some tracks peak at -1dB FS and have a dynamic of 6dB. But they have
been skillfully processed and sound a lot better than one would expect.
Perhaps this would be a good topic for a new thread?

Probably. However mainly because others may be less careful than yourself!

I just bought a couple of 'new' (i.e. remastered) sets of CDs of classic
Jazz. Both are noticable LOUD and hit the 0dBF led on my meters regularly.
(I'm currently using some old CDRW audio recorders as CD drives. They have
useful meters so show this up.)

I've not checked in detail because I'm otherwise distracted (by the topic
of this thread). But I suspect if I analyse them they will show many peak
or near peak sample values and probably 'overs' in between.

For modern pop/etc if people want loudness (or clipping) as an effect, fair
enough. My problem is when reissues of music that can endure gets messed
about.

BTW coming back on topic. People may find these preliminary results of
interest.

http://jcgl.orpheusweb.co.uk/temp/in...lacresults.png shows a comparison
between the flac and aac streams over a period of 35 mins. The lower (diff)
shows how much *below* the flac audio level the 'difference' between the
two is.

http://jcgl.orpheusweb.co.uk/temp/spectraflacvaac.png shows comparison
spectra for a 1000 sec period. This was mainly to show that the standard HF
rolloff above about 20kHz is present, but also shows the differences
between the two.

For both of the above the versions were time aligned to a sample.

I'm currently trying to get stats on how often 'blocks' of flag fail to
arrive and leave a 'lost' section in the received signal. But these are
rare enough most of the time to make this hard to assess beyond "it does
happen ever now and then". Sadly, a lost 4 sec in the middle of a long
classical work can be a bit of a distraction! So even occasional lost
chunks can be annoying.

Jim

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