"robert bristow-johnson" <rbj@audioimagination.com> wrote in message news:C041B51F.10EF6%rbj@audioimagination.com...> in article Ru-dnd90tJ-tgoHZRVn-iA@rcn.net, Jerry Avins at jya@ieee.org wrote > on 03/18/2006 09:54: > >> robert bristow-johnson wrote: >> >> ... >> >>> definitely 2 filters. the code and likely the coefficients would be the >>> same, but the structure (or "record" or whatever term one uses) that >>> contains the filter states would be different for each filter. >> >> I guess you're thinking if IIR filters. For transversal FIRs, a >> double-length circular buffer traversed with a stride of two works >> alternately on the left and right samples. > > yeah, you're right (i was thinking IIR, but not specifically). actually, > you could do this interlaced thingie with both input and output streams in > the Direct Form 1 IIR also. (but i still think it's ugly and not very > useful.)It's actually very useful (and beautiful, IMHO) when implemented with a SIMD DSP such as the SHARC. Two filters for the price of one!
Stereo audio and Equalizer
Started by ●March 17, 2006
Reply by ●March 19, 20062006-03-19
