23 Jul
2010
23 Jul
'10
2:31 p.m.
Hi LAU friends!
I've almost finished (bass traps and other acoustic treatment remains)
building my little home studio and of course: every software is all Linux. The
rooms small size (3.00m x 3.40m = 10.2 m²) makes it lesser than ideal when it
comes to acoustics but the room's sound is great so I don't really worry to
much about it under the circumstances.
When I'm done with bass traps and foam materials, then it's time for the final
corrections as far as it goes. I do have a full two channel 1/3 octave EQ
(Phonics PEQ 3600 2 x 31) that can do very much, how can Linux help me to do
the right sound here?
Ken Restivo used Jconv when mixing and emulating different rooms and
situations. And it sounds to me as a very good solution and leaves two
questions:
1: How do one measure and flattern out the room'm and monitor's
frequency curve with Linux. Do one use pink noise or a sinus
sweep or perhaps both? I have two mikes which is probably good
enough for this, but how do I do it and which SW?
2: How do I emulate "the perfect" studio and other situations with
the help of Jconv?
I'm not surprised if it all ends up with Fons only solutions here, but can
someone with experience with this help me getting thru this in some not to
difficult steps? I hope I have describes what I want in an understandable way.
Thanks, Jostein
23 Jul
23 Jul
4:11 p.m.
On Fri, Jul 23, 2010 at 2:30 PM, Jostein Chr. Andersen wrote:
Hi LAU friends!
I've almost finished (bass traps and other acoustic treatment remains)
building my little home studio and of course: every software is all Linux.
...
Nice. Best wishes for your new studio!
When I'm done with bass traps and foam materials,
then it's time for the final
corrections as far as it goes. I do have a full two channel 1/3 octave EQ
(Phonics PEQ 3600 2 x 31) that can do very much, how can Linux help me to do
the right sound here?
...
drc was mentioned on 64studio mailing list a while ago.
http://drc-fir.sourceforge.net/
From its description:
"DRC generates digital room correction FIR filters to be
used within HiFi systems in conjunction with real time
convolution engines like BruteFIR."
Alas, no first hand experience from me. I have neither
studied nor used it, so I can just refer to its extensive
documentation.
greetings,
d
5:18 p.m.
Hi,
On Friday 23 July 2010 14:30:24 Jostein Chr. Andersen wrote:
I've almost finished (bass traps and other
acoustic treatment remains)
building my little home studio and of course: every software is all Linux.
The rooms small size (3.00m x 3.40m = 10.2 m²) makes it lesser than ideal
when it comes to acoustics but the room's sound is great so I don't really
worry to much about it under the circumstances.
When I'm done with bass traps and foam materials, then it's time for the
final corrections as far as it goes. I do have a full two channel 1/3
octave EQ (Phonics PEQ 3600 2 x 31) that can do very much, how can Linux
help me to do the right sound here?
Help one: japa
Its a frequency analyzer and can output white and pink noise. It can help you
set your EQ correctly.
But eq'ing isn't all:
Ken Restivo used Jconv when mixing and emulating
different rooms and
situations. And it sounds to me as a very good solution and leaves two
questions:
1: How do one measure and flattern out the room'm and monitor's
frequency curve with Linux. Do one use pink noise or a sinus
sweep or perhaps both? I have two mikes which is probably good
enough for this, but how do I do it and which SW?
To really flatten and optimize the room-response electronically you will have
to record the impulse response of your room (for each speaker) and use drc to
compute a correction function in time and frequency domain. Then you can use
that pulses with jconvolver to get a better room. I do that at my home and its
really great, even though my speakers already where great.
Here is a catch: with digital room correction you will have to undo some of
your room optimizations. But the details are in the very good drc-manual.
2: How do I emulate "the perfect" studio and
other situations with
the help of Jconv?
Once your room is optimized, you can use any additional impulse response to
put your room into another acoustical environment...
Have fun,
Arnold
10:57 p.m.
On Fri, Jul 23, 2010 at 02:30:24PM +0200, Jostein Chr. Andersen wrote:
1: How do one measure and flattern out the room'm
and monitor's
frequency curve with Linux. Do one use pink noise or a sinus
sweep or perhaps both? I have two mikes which is probably good
enough for this, but how do I do it and which SW?
2: How do I emulate "the perfect" studio and other situations with
the help of Jconv?
There are two approaches:
1. Use pink noise and an equaliser to correct any errors in frequency
response.
2. Use impulse response measurements and convolution to correct both
frequency and 'time' response.
For both you need an omnidirectional measurement microphone.
The cheap Behringer or anything similar will do.
For the first solution, use JAPA to measure (using the 'proportional'
display setting), and some equaliser to do the correction. I would
*not* use a 1/3 octave setfor this but an EQ such as the one you've
been testing. The target is *not* a flat frequency response, but one
that doesn't try to make your speakers do what they can't do, and in
any case one that drops off gently above around 2 kHz to somehting
between -6 and -12 dB at 20 kHz. How much depends or your taste.
For the second approach DRC + jconvolver is the way to go. DRC has
excellent documentation, make sure to read all of it before you try
anything.
Ciao,
--
FA
There are three of them, and Alleline.
29 Jul
29 Jul
4 p.m.
New subject: Room and Sound Calibration With Linux - Thanks!
On Friday 23 July 2010 14.30.24 Jostein Chr. Andersen wrote:
...
I'm not surprised if it all ends up with Fons only
solutions here, but can
someone with experience with this help me getting thru this in some not to
Thank you all for your very useful information. I will try this out in a week
or two.
Right now, I'm here:
http://www.oringen.se/english.4.39a60313129a34fc2c580001128.html and running
in the wood.
And then it's some working and then something more important!
:-)
Jostein
31 Jul
31 Jul
2:07 a.m.
New subject: Room and Sound Calibration With Linux - Thanks!
On Thursday 29 July 2010 15:59:45 Jostein Chr. Andersen wrote:
On Friday 23 July 2010 14.30.24 Jostein Chr. Andersen
wrote:
...
What could be more important then computers and music? You don't have a life,
do you???
Have fun,
Arnold
PS: My guess it that its your wedding...
I'm not surprised if it all ends up with Fons
only solutions here, but
can someone with experience with this help me getting thru this in some
not to
Thank you all for your very useful information. I will try this out in a
week or two.
Right now, I'm here:
http://www.oringen.se/english.4.39a60313129a34fc2c580001128.html and
running in the wood.
And then it's some working and then something more important!
2 Aug
2 Aug
2:51 p.m.
New subject: Room and Sound Calibration With Linux - Thanks!
On Friday 30 July 2010 12.16.24 Arnold Krille wrote:
:-) I'm married since 2002. The "something more important" part of my
previous
msg is music. I think my life consists of computers and music and some
orienteering. That life is largely possible thanks to my wife. :-)
Jostein
On Thursday 29 July 2010 15:59:45 Jostein Chr.
Andersen wrote:
...
And then
it's some working and then something more important!
What could be more important then computers and music? You don't have a
life, do you???
Have fun,
Arnold
PS: My guess it that its your wedding...
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6 comments
4 participants
participants (4)
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Arnold Krille -
David Adler -
fons＠kokkinizita.net -
Jostein Chr. Andersen