JohnSwenson wrote: > > > The parameters I am actually interested in do not use huge amounts of > processing power so it should be good on the wandboard. > > Thanks, > > John S.
And earlier you said. JohnSwenson wrote: > I have done extensive testing of different DAC chips and digital filters > and have come to the conclusion that one of the biggest problem with > almost all DAC chips these days is the digital filter. Every one of them > (including the ESS) use a complex digital filter rather than something > like a true SINC, attempting to get better numbers in the spec sheet > without spending the required silicon resourses normally required to get > those numbers with a simple filter. My testing has shown that these > complex filters are quite audible and one of the biggest detriments to > really good sound out there. Using a DAC chip without a digital filter > and implementing one in an FPGA using a straight forward basic filter > design sounds much better than using the filters in the chips > themselves. Is your objection to having filters design using interpolated FIR methods like the response I pasted below? Would this be considered "complex" per your post above? Are you planning to use a filter that is just a truncated (possibly windowed) SINC function instead? I'm just trying to understand what you consider "simple" and "complex" considering that what may be a mathematically -simple- approach may require more computationally -complex- implementation to achieve reasonable rejection. +-------------------------------------------------------------------+ |Filename: ifir.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=14879| +-------------------------------------------------------------------+ ------------------------------------------------------------------------ dsdreamer's Profile: http://forums.slimdevices.com/member.php?userid=12588 View this thread: http://forums.slimdevices.com/showthread.php?t=98544 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
