Resampling down to 44.1KHz
Reply #80 – 2008-05-21 10:14:24
I do get suspicious when I look at a digital mixdown of 19KHz and 20Khz sinewaves that were created at 44.1KHz. There are so few sample points and yet as you say cooledit manages to create a realistic graphical interpolation (with this relatively simple waveform). In contrast, when I look at 19KHz and 20KHz sinewaves created at 96KHz and mixed digitally in cooledit, there are so many more sample points in the mixdown that sophisticated interpolation would not be necessary Sounds like you still think that downmixing makes reconstruction somewhat harder. As 2B already pointed out all of the following operations are linear: (1) sampling (2) mixing (3) reconstruction It follows thatreconstruct(sample(x)) + reconstruct(sample(y))e = reconstruct(sample(x) + sample(y)) = reconstruct(sample(x + y)) [at a higher sampling rate] you could simply join the dots So? Relevance? Seriously. Grab a good DSP book that explains sampling and reconstruction. All what's been said here has been said many many times before.This thread started with the downsampling to 44.1KHz question. But if downsampling to even 48KHz is a probem, 44.1KHz would be even more so. There's no problem with downsampling to 44.1 kHz or 48 kHz (in theory). Reconstruction is also not a problem (in theory). There are simply soundcards out there that manage to screw up reconstruction. That's about it.