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Author Topic: Room Correction ?  (Read 2042 times)

bwa

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Room Correction ?
« on: May 13, 2005, 04:40:41 am »

I'm a MC10 user and are only using digital output (s/pdif). So far I've played with upsampling to 24bit/96kHz in the DSP Studio.

Have searched around in this forum, and cannot find much info regarding qualizing or rooc correction. Especially bass management. If I wanted a parametric high-quality qualizer, it's should be a plugin, rigth?

If, so a few pointers, maybe?

I a digital environment,it should not be difficult to imagine that a complete room correction software could be installed and used with MC playback. Is this 'dreamsoftware' ?
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modelmaker

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Re: Room Correction ?
« Reply #1 on: May 13, 2005, 01:12:27 pm »

There is a derectx host plugin available from the plugin page. You should be able to find quite lot of stuff out on the web.

The purpose of room correction, is to adjust the effects that a room has on the sound. Room correction involves more than one process. Ideally, you want the room prepped accoustically before you start messing around with equalizers, be they linear or parametric.

An "ideal" room should have combination of absorbative and reflective surfaces. I believe an old rule of thumb for the ratio was 1/3 and 2/3 respectivly

 After the accoustic environment has been dealt with, equalizers can be used to do the final tweaking to get the frequency response of the audio system and the room as close to flat as possible. You  need a spectrum analyzer or a sound pressure level meter ,  a pink noise source to measure and an equalizer to  adjust.

However, most people, except for listeners of classical and jazz, don't like a "flat" room. But, then, that's what your bass and treble controls are for.

There are a couple of good sites for further in depth discussion on this and other audiophile topics which I can't find the links for at the moment. Alex, if you're  out there, maybe  you could add them.


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Jay.

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Alex B

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Re: Room Correction ?
« Reply #2 on: May 13, 2005, 06:19:27 pm »

If the room acoustics has problems in the bass area it's difficult or impossible to correct that only with eq. When the frequency response is adjusted for one place in the room it is not necessarily good in another listening position. It's best to start with the room itself as modelmaker said. Also, proper speaker placement can help a lot.

I have visited e.g. these sites from time to time:

http://forums.audioholics.com/forums/
- and the "Room Acoustics, System Layout & Setup" subforum: http://forums.audioholics.com/forums/forumdisplay.php?f=10

http://www.avsforum.com/avs-vb/

http://forum.ecoustics.com/bbs/messages/board-topics.html


EDIT

This is good reading: http://www.audioholics.com/techtips/roomacoustics/index.php
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bwa

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Re: Room Correction ?
« Reply #3 on: May 14, 2005, 03:24:35 pm »

I'm afraid you misunderstood me, I ment room correction plugin/software for the MC .....
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modelmaker

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Re: Room Correction ?
« Reply #4 on: May 14, 2005, 04:50:29 pm »

No, I don't think I misunderstood. Weren't you asking if there was a MC plugin for room correction?

I said, you could use the Direct X Host plugin (from MC) and then you can plug in room correction software such as a parametric EQ that you could find out on the net.

In otherwords, no, J River does not itself have room correction software (plugins), but gives you the ability to use outside software to do it.

Quote
complete room correction software
.
This is definitely dreamware. Because no 2 places in a room have the same acoustics, it is impossible to have "complete room correction". The best one can hope for in the real world is maybe a "hotspot" or 2. And even those hotspots won't be perfect

http://www.audioholics.com/techtips/roomacoustics/perfectaudioroom.php
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Jay.

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bwa

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Re: Room Correction ?
« Reply #5 on: May 18, 2005, 04:24:49 am »

.
This is definitely dreamware. Because no 2 places in a room have the same acoustics, it is impossible to have "complete room correction". The best one can hope for in the real world is maybe a "hotspot" or 2. And even those hotspots won't be perfect

http://www.audioholics.com/techtips/roomacoustics/perfectaudioroom.php

Sorry for my bad english.

With complete I ment, auto calibration with a microphone

I mean, e.g. Meridian and Denon/Audyssey, is (my guess) only software. With a 3 GHz CPU it should be enough processing power (at least in stereo mode) to create a software package with proper plugin so MC is using the configuration from the Room Correcting Software. That was my thougths.


Anyway, a HQ parametric bass equalizer would be a good start...
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Mastiff

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Re: Room Correction ?
« Reply #6 on: May 18, 2005, 06:02:18 am »

Try searching for convolve filter on this forum. There was discussion about that a couple of years ago, I believe.
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thomaspf

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Re: Room Correction ?
« Reply #7 on: May 18, 2005, 12:35:30 pm »

Another vote for having JRiver integrate some form of room correction into the product.

I am using the directX host with a parametric equalizer to tame low frequency room modes but setting this up is quite an effort.

Doing this in a more automated way would be of great value.

I've tried the room treatment route but my wife simply said no so I have to do with what I can improve on outside of that and I found it to be quite significant.

There is tons of freeware and commercial stuff but none that I looked at is really well integrated like a Tactaudio RCS and I would be happy with just basic frequency response correction.

Cheers

   Thomas
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