Re: [LAU] Room acoustic sound analysis

Dear Russel,

As a former Cakewalk user (the first version I used was a 1992 DOS one!)
I know how you feel. I just posted my experience in managing to do a
complete project (much different from the scenario you depict) entirely
in linux... so let me first wish you all the best in pursuing you
musical career/inspiration/mission!

To go into you question, I'm not much of an acoustics expert but I do
have experience of bad recording environments, As a less scientific and
more 'hand-crafted' solution I have seen that microphone/instrumen(s)
placing may help a lot with experimentation and 'ear tests' when
refurbishing the room is not an option (or the room is simply the one
you get). I also guess that *light* effects and eq might help in
post-production process. I work in a famous auditorium which is assumed
to have been designed for good acoustics, but I hear very diverse,
subjective opinions on the topic, so I guess there is no 'perfect
ambient' for sound, although a good environment can help.

Just my two pennies anyway.

All the best,
Lorenzo

Russell Hanaghan wrote:
> Hello LAU,
>
> While I have not been active on this list in a long time, I have been
> watching from the side stage and it's nice to see the string of various
> information and experience still flowing thru the LAU community.
>
> I'll get to my questions as they relate to the subject title in a sec
> but firstly, a little back ground on some significant changes I have
> going on and how they may relate to the furthering of open source audio...
>
> I have left the corporate grind and world of regular income for purposes
> of pursuing my all time passion. I have not a pot to piss in nor a
> window to pitch it out of in terms of capitol and am largely doing it on
> faith! My core products are fretted instrument and amplifier / music
> related electronics repair, recording and demos, small PA system rentals
> and also working as a musician for hire, primarily doing my solo thing.
> In another post I will speak to my dilemma of being unhappy using Sonar
> 8 on Windows Vista and looking for some possible encouragement to
> consider going totally open source!
>
> I have rented a large warehouse type space (2600'sq) in the Nth Cali
> foothills and within there are several spaces dedicated to the various
> products I alluded to. The main room that we do live music in is a good
> size, approx. 30'w x 40'l with 17' ceilings. It's predominantly drywall
> and stud construction and also with a 17'x10' metal roll up door. It has
> a concrete floor with industrial carpet covering it. I have just
> described something of an acoustical nightmare, likely only topped by an
> aircraft hangar with corrugated iron walls and roof! :) We have been
> doing some live stuff thru a PA in this room and it's a sure fire way to
> reveal how the room reacts. The room produces some high freq (2k - 5k)
> boosts as well as some 150 to 400hz bumps. While I have implemented some
> baffles to reduce live high freq bounce, these only serve to deaden the
> room and not change tonal characteristics. How I go about changing the
> mechanics of the room will be dictated largely by economics but in order
> to assess this, I'm looking to to some spectrum analysis.
>
> Has anyone set up a laptop and microphone and open source apps and
> performed this to some success? I need a tone generation source as well
> as an analysis tool. It needs some bias adjustment for mic and sound
> card inherent response I should think. That said, it does not need to be
> a perfect tool. If I can get some form of reliable, self referenced
> measurement, that would give me something more than the guess work I am
> currently using from my head and my ears.
>
> TIA for your input and ideas.
>
> Russell
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Received on Mon Sep 14 12:15:05 2009