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So why is decimation used at all if sample rate conversion (SRC) with integer multiples is always possible using two steps? For example, one could take a PCM 96000 sample rate recording, and multiply by 147 and then divide by 320 to get to a 44100 SR. Or take a 192000 SR recording and multiply by 147 and then divide by 640. I don't see how DSD provides any advantages over PCM for SRC if you make the conversion in two steps, since the exact same SRC can also be accomplished using PCM. Naturally, a two-step SRC without decimation will require more time and memory to compute - perhaps making it less suitable for cost-effective real-time hardware implementation. But hardware is getting faster and more inexpensive, so I'm not even sure that is a limitation. Is it the case that every non-real-time SRC (ie. DAW) is done in two steps without decimation? Again, I still don't see the advantage of DSD over PCM for SRC (I'm not talking about word-length, only SRC). Eric Jacobs The Audio Archive -----Original Message----- From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]]On Behalf Of Konrad Strauss Sent: Tuesday, February 22, 2005 3:35 PM To: [log in to unmask] Subject: Re: [ARSCLIST] software for .wav files on 2/22/05 12:41 PM, Eric Jacobs at [log in to unmask] wrote: > The DSD sample rate is 2.8224 MHz. This is 64 x 44100. However, 48000 does > not divide into the DSD sample rate at an integer multiple. Maybe I'm missing > something? > It's a 2 step process. Multiply by 5 and divide by 294. -- Konrad Strauss Director of Recording Arts Associate Professor of Music Indiana University School of Music http://php.indiana.edu/~kstrauss http://www.music.indiana.edu/department/audio/