In Reply to: No thats not an issue with Synchronous Rate Conversion posted by jcox on May 15, 2006 at 20:35:15:
The "320/147" ratio was brought up by the late Julian Dunn of Prism Sound, which would indeed make this a "synchronous" conversion. The problem is I've yet to see the a 16/44 to 24/96 conversion actually implemented this way.....I don't know where the term "zero stuffing" came from.... The upsampled signal is not "zero stuffed", but calculated using a mathematical process called "convolution," where a set of coefficients representing the "Fourier transform" (within a truncated time period or "window") of the brickwall filter function is first multiplied with the a set of corresponding values from the raw signal at a specific time, and then added together, to provide the "interpolated" sample value.
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Follow Ups
- Re: No thats not an issue with Synchronous Rate Conversion - Todd Krieger 01:27:01 05/16/06 (0)
- You are aware of "fast convolution" aren't you? - real_jj 12:54:26 05/25/06 (0)
- I haven't been inside any DAW code so I can't say what's used - jcox 10:23:41 05/16/06 (0)