Xref: utzoo rec.audio:30270 comp.dsp:1488 Newsgroups: rec.audio,comp.dsp Path: utzoo!utgpu!cunews!wilf From: wilf@sce.carleton.ca (Wilf Leblanc) Subject: Re: Good speaker + DSP == perfect speaker? Message-ID: Sender: news@ccs.carleton.ca (news) Organization: Carleton University, Ottawa, Canada References: <149891@pyramid.pyramid.com> <3783@uc.msc.umn.edu> Date: 28 Mar 91 21:49:05 GMT dpm@msc.edu (David P. Mottaz) writes: >What fun to watch this thing go berserk when a cat runs through the >room upsetting the "waves", or if the phone rings. It will need a "I >Have A Cold And My Head Is Stuffed Up" mode. For a little extra you get >a great feature, the Air Conditioner Fan Noise Compensation Chip. The >acoustical properties are much different in the summer, when you have a >glass bottle of beer in your hand(that's right, High Frequency Deflection) >than in the winter, with you wearing a thick sound-absorbing sweater. Exactly, although I think you need a ;-), in there somewhere. However, there are two issues here: 1. Improving the sound due to poor speaker characteristics; 2. Improving the sound due to poor room acoustics. Item 1 is easy using DSP, and need not be adaptive. Item 2 is very difficult, because of the issues you mentioned. I would hate to see what happens when you are using a system which compensates (adaptively) for poor room acoustics in a very small room and someone opens the door ;-). However, think of the $ people are going to make selling these advanced (?) features. If people are going to spend money, there just has to be many modes such as you mention: 1. Cat mode; 2. I have a cold mode; 3. Air conditioner on mode; 4. I'm drinkin' a beer mode; 5. Canada mode, (i.e. I got my sweater on mode). However, you forget many modes: 1. I've got big ears mode; 2. I'm old, so could you boost the high frequencies a bit mode; 3. I've got a thick forehead mode (also known as great bone conduction mode); 4. And of course, quit adapting, you're driving me crazy mode. >-Dave/dpm@msc.edu/Minnesota Supercomputer Center :-) 8*> I-](RoboCop smile) -- Wilf LeBlanc, Carleton University, Systems & Comp. Eng. Ottawa, Canada, K1S 5B6 Internet: wilf@sce.carleton.ca UUCP: ...!uunet!mitel!cunews!sce!wilf Oh, cruel fate! Why do you mock me so! (H. Simpson)