evdplancke;689154 Wrote: > 1) is different from 3) because the low pass effect will affect the > baseband signal: a convolution of a square pulse with perfect dirac > pulse train in the time domain corresponds to multiplying the signal in > the frequency domain by a very poor sinx/x lowpass filter. This has > nothing to do with the reconstruction filter used for 3): this is a > lowpass distortion BEFORE reconstruction, that is definitely altering > the baseband signal in an extent inversely proportional to the square > pulse width.
Are you referring here to aperture effect? I understand that this can be a problem, but can be compensated by equalisation or resampling to reduce the aperture ratio. But this is not resampling in the sense of increasing the sample rate. Wouldn't having a higher sample rates mean that your pulse train would need to be more perfect - a given pulse duration would now represent a higher proportion of the sample period surely(?) and would therefore reach zero order hold for a shorter pulse width . -- adamdea ------------------------------------------------------------------------ adamdea's Profile: http://forums.slimdevices.com/member.php?userid=37603 View this thread: http://forums.slimdevices.com/showthread.php?t=93483 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
