Date: Sun, 24 Nov 1996 14:37:49 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: henrich@crh.cl.msu.edu (Charles Henrich) Cc: dyson@freebsd.org, hasty@rah.star-gate.com, chat@freebsd.org Subject: Re: Stereo RealAudio for FreeBSD! Message-ID: <199611241937.OAA01239@dyson.iquest.net> In-Reply-To: <199611241524.KAA25683@crh.cl.msu.edu> from "Charles Henrich" at Nov 24, 96 10:24:59 am
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> > Hmm, I havent been able to distinguish a 128 vs CD stream except in the rarest > of cases (pure digital tones seem to get thwacked the worst). Have you tried > a 256kbps bit rate? > I have some music material where 128 is noticeable. (Lots of high-freq transient material.) Probably 160 or 256 would be nearly perfect, but I have found that I eventually learn the defects and artifacts of various processing schemes, and become intolerant. > > if this is boring for all you multimedia software experts, but I am a bit > > of a newbie in this stuff, finally PC hardware appears to start becoming > > really interesting for playing with all the ideas that this frustrated > > ex-EE has been having over the years... > > :) What sort of thing are you using this for John? > Many years ago, I did lots of EE things, and one of my interests is/has been the signal processing aspects of audio. Specifically, NR systems and audio processors (for broadcast/recording) and the like. Right now, I am re-educating myself by implementing the best single band audio compressor limiter possible :-). The next step will probably be to experiment with single-ended NR or signal restoration software. This is all just a diversion (I am deferring to the SMP crowd on the kernel right now, and hope to help them soon.) Mostly, I am resting the VM/VFS parts of my brain and going back to my roots for a while, reinvigorating my Z transform braincells. BTW, I have posted a few developmental copies of the SW (most being pretty fatally flawed, but still work better than anything else that I heard in my early days.) The effort is much easier than with DSP's due to speed and ease of working with FP on workstations (and infinitely easier than with analog electronics.) The PC is a great modeling tool, that might either have a target product implemented in analog (say with the neat analog devices parts), or digitally with A/D and DSPs... But, anyway, it is still fun to try some things that I have put aside for years. John
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