Re: Progress?

--- Daniel James <[email protected]> wrote:

> Hi Florian,
> 
> > JAMin and other mastering tools are used to tweak
> levels _within_ the
> > digital 16/24/whatever bit audio, but _not_
> outside.
> 
> At the moment, yes, but it seems to me that having a
> reference level for 
> monitoring is only one part of the story. Bob and
> other AES members will 
> no doubt be working in acoustically tuned mastering
> rooms, but I'd 
> hazard a guess that most Jamin users don't have that
> luxury.

My studio and control rooms are all acoustically tuned
for equalization and reverberation.

> There are now a number of self-calibrating monitors
> on the market that 
> use a measurement microphone and on-board digital EQ
> to correct bumps 
> and dips in the frequency response of the room they
> are placed in.

Which addresses half the problem and that's gotta be
alot better than nothing.

A couple of hardware development business partners of
mine and I developed some tools for observing room
reverberation and performing adaptive bleed
cancelation. I always knew my studio partners and I
designed our room accoustics for good reason but as
the years went by I got used to taking advantage of
good accoustics and lost my appreciation for those
reasons.

When I started measuring room reverberation it was a
real wakeup call. Anyone tempted to think close mic
technique minimizes room reverberation or equalization
influence is very, very wrong.

> However these monitors are like to remain expensive,
> and have interfaces 
> controlled by proprietary software (uggh!). The
> extra hardware in these 
> monitors is only there to do a job that a commodity
> PC could do, and we 
> already have a finely-grained EQ plugin at the heart
> of Jamin.
> 
> So I figure if you're using a microphone and some
> kind of SPL meter to 
> set your reference monitoring level, you might as
> well analyse the 
> frequency response of the room while you're there.
> Sort of like doing an 
> impulse response in reverse - instead of sampling an
> effect you want 
> (live room reverb) you sample an effect you don't
> want (mastering room 
> non-linearity) and correct for it.
> 
> This could be in a 'monitor output' section of Jamin
> or it could be in a 
> standalone Jack application.

Definitely more appropriate in a standalone or
something outside of JAMin. The problem you want to
filter is not specific to mastering so it would really
be a waste to use it there. Especially since JAMin is
already a resource hog that isn't suitable for use
during tracking. That shouldn't be interpreted as a
knock against JAMin--far from it. A light weight tool
would be very useful for many people.

If a tool is designed it's application can go beyound
room treatment and probably should. I suppose.

ron

 Obviously you don't
> want your room 
> correcting EQ to be applied to the mastered audio,
> only the output which 
> goes to your monitoring system.
> 
> Cheers!
> 
> Daniel
> 
> 
>
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