Path: utzoo!attcan!uunet!microsoft!brianw From: brianw@microsoft.UUCP (Brian Willoughby) Newsgroups: comp.dsp Subject: Re: More digital mixer stuff Message-ID: <7926@microsoft.UUCP> Date: 2 Oct 89 02:30:12 GMT References: <9238@pyr.gatech.EDU> <1989Sep29.102204.8798@ivucsb.sba.ca.us> <1160@lakesys.lakesys.com> Reply-To: brianw@microsoft.UUCP (Brian Willoughby) Organization: Microsoft Corp., Redmond WA Lines: 29 In article <1160@lakesys.lakesys.com> mikes@lakesys.UUCP (Mike Shawaluk) writes: >BTW, isn't this "delay" the same "problem" that's been mentioned with certain >CD players, which use only one D/A converter for both channels, but mux the >stereo outputs? You hit it right on the head. > One person (in a review I read) gave the analogy of standing >1 cm closer to one of the stereo speakers in the room while listening to a >CD, as being the effect of this phase shift (i.e., the speed of sound vs. the >delay). I had asked earlier about just how important it would be to correct such phase shifts. From the example of a room environment, I guess the answer is: not very bloody important. But, if the sound is to later be mixed - for monophonic broadcast, or any other need to combine the stereo signals electronically, not acoustically (where placement affects delay anyway) - then it does become important, merely because the result (with its peculiar frequency cancellations and reinforcements) would be different than it would without the shift. >-- > - Mike Shawaluk Brian Willoughby UUCP: ...!{tikal, sun, uunet, elwood}!microsoft!brianw InterNet: microsoft!brianw@uunet.UU.NET or: microsoft!brianw@Sun.COM Bitnet brianw@microsoft.UUCP