Sharon - Digitally Corrected Pluto

[mikemcd]

http://members.cox.net/mikemcd/Sharon/Sharon.shtml

 

[sdclc126]

Very interesting - I'm wondering if this sort of thing can be more or less universally applied to any desing?

 

[BHTX]

I don't see why not. Yes, very interesting indeed. I just downloaded it to check it out. I need to get a good mic though..
I hear the Behringer ECM8000 actually works pretty well? ..Can be had for under $50.

 

[454Casull]

You can DIY a mic from Linkwitz's plans.

Also, who's Steve Linkwitz?

 

[mikemcd]

Yes, this approach can be applied to many designs. If it can be done in a Honda S2000 (http://members.cox.net/mikemcd/S2000/S2000Correction.shtml), it can be done almost anywhere.

And, yes, the Behringer ECM8000 works very nicely. Being off by 0.1 or 0.2 dB is not very important when the listening environment has a much larger impact.

 

[Sjef]

I have tried this software some time ago in combination with the foobar convolver plugin. It's not easy to setup and make good measurements but if you manage to do this right it's certainly worth the trouble. It works in some kind of the same way as my DEQX unit at about 1/1000 of the cost, that should sound interesting to the diy out here. But then again, nothing comes for free, you will have to do all the hard work yourself and start learning and expermenting with it for quite a long time before you get it right.

I have used it for a friends system. we made a totally foobar based system where the crossover and room correction was done in the foobar player, worked out very well, only drawback offcoarse is that it only works when using foobar, no other sources allowed anymore, but we didn't care about that.

 

[mikemcd]

Yes, the user interface is not user friendly. I built some Excel and Matlab scripts that automate the process somewhat. But, when you get finished, you will know quite a lot about DSP.

There is also a convolver for Windows Media Player, so that opens up some new sources.

 

[jzagaja]

Congratulations Mike! Nice work on Matlab graphs (I wish I could compute some). I'm building such a speaker with a horn loaded tweeter. I've tried DRC and Acourate but don't know how to use Windows Media Player for two way crossover+DRC (4 channels via Digigram 440VX).

 

[Daveis]

Yes, this approach can be applied to many designs. If it can be done in a Honda S2000 (http://members.cox.net/mikemcd/S2000/S2000Correction.shtml), it can be done almost anywhere.

Mike,

If the crossover was done in the digital domain, would you still use the Zobel on the woofer?

(this question has bugged me for years)

 

[el`Ol]

Is it the sense of a near omnidirectional design to cancel out the room reflections?

 

[mikemcd]

Daveis,

DRC would correct for the change in frequency response caused by the changing speaker impedance, so a zobel would not be required on a speaker that was fed only digitally corrected audio. But such a speaker would have poorer frequency response on a non-digitally corrected audio stream.

 

[jzagaja]

Is it the sense of a near omnidirectional design to cancel out the room reflections?

Good question and another thing - omni radiation changes perspective quite drastically. Sound sources are moved behind the wall. DRC corrects first milliseconds so that I would ask - do you hear any change in localisation/ambience?