In Reply to: All FIR filters are fatally flawed. posted by jmlpartners on February 10, 2009 at 13:08:04:
"In all cases the signal frequency is at least seven octaves below the Nyquist frequency."
Based on the pics, I'd say the signal frequency is *very* close to the Nyquist frequency. The ringing components are roughly the same frequency of the signal components. If that ramp up/ramp down waveform were seven octaves below the Nyquist frequency, the ringing components would be roughly seven times the signal frequency. But the ringing components appear to be roughly the same frequency.
But on the other hand, for so long of a time, this problem has been an elephant in the room that the audio engineering community had chosen to ignore.
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Follow Ups
- At 44.1 kHz Fs, No Solution Isn't Flawed......... - Todd Krieger 13:22:08 02/10/09 (0)