Room correction, DSP for dummies.


I have not paid a lot of attention to audio for some time, almost 15 years and as a result I am trying to catch up on some of the innovation and tech developments that have been popping up in that time. 

One of the more interesting to me is the advent of electronically guided digital signal manipulation to help quell small system issues and room reflections. It seems wildly promising but  the few systems that I have read about that seem to work well look to be  painfully expensive. 

Reports have seemed to indicate that this technology was making its way into other, more affordable formats but I guess I just don't understand or grasp where the field is going well enough to know where the bulk of the technology is and how its manifesting in our hobby. 

Who can help shed some light on where this tech is, how  its being applied and how can I make use of it without selling a kidney? Maybe that last part is not possible yet? 

Thanks in advance! 
128x128dsycks

Showing 4 responses by david_ten

the room correction assures your speakers sound as the designer intended in your particular space.

@grannyring Bill, I’m scratching my head regarding the sentence above. It’s confusing to me, if I interpret it at face value. Can you explain further? Thanks.

the room correction assures your speakers sound as the designer intended in your particular space.

The speaker is now able to sound as it should without room editorializing and degrading.

@grannyring  Bill, thanks for your response, but it still doesn't clarify things for me. I'll try with more specifics. 

What you are saying begs the questions:

- how does room correction know which speakers you have? Yes, some speaker manufacturers provide their specifics, but how complete are these? Is this a perfect system? Is it based on anechoic figures? If so, can one's real life room ever be anechoic?

- how does room correction know what the speakers sound like or are designed to sound like? This isn't a simple question. ["sound as it should"]

- which leads to the far trickier how do you know what the speakers are supposed to sound like? 

- or that your interpretation of the sound is what the designer intended?

- does the designer know what he or she "intended for your particular space"?

- are you trying to re-create the speaker designer's space, as being the ideal? Is it? Do you know it or does room correction know it?
 
There are more, but I'll stop with these. 

I'm sure this is coming across as being difficult, so let me apologize in advance. Looking forward to understanding and learning. Thanks.
@whart   Thanks, Bill. Your post is really helpful. I've used room correction software for my home theater system in the past, and it was helpful... like you I applied it to the lower frequencies and for assisting with subwoofer performance.

And yes, I was addressing Bill = grannyring  : )
Bill, the questions and queries were not contemplative...they are direct. 

The 'more' portion was somewhat addressed by erik_squires, one of which is all the other 'pieces' in the sound reproduction chain...does room correction also know what was "intended" by those designers (power supplies, sources, recordings, cables, etc.)?...did the speaker designer know which components, etc. the customer was going to choose to build his or her system? Etc.

In other words, (what all) is room correction divining?

the room correction assures your speakers sound as the designer intended in your particular space.

The speaker is now able to sound as it should without room editorializing and degrading.

the speaker is free to be what it was intended to be

I'm not against room correction or DSP, or other software based 'corrections.'  @erik_squires  position lines up more with where I'm at, on the topic.

My issue is with "sound as intended" and "sound as it should" which are remarkable statements, to say the least, and to this mind border on the incredible.