TheEastGateMS said:

maybe i am missing something in the math, but if the numbers we are dealing with are really 88.2 and 44.1, then the lowest common multiple is in fact 88.2. besides, this also would make sense with r8brain pro's behaviour. there is one step when converting 88.2 to 44.1 (and is about 1/5th the processing time of 96 to 44.1) and 2 steps when converting 96 to 44.1 (obviously following the logic/process MM is talking about, but takes forever at highest quality settings).

also, the guys from lynx put it in layman's terms in just that way... that 88.2 is a cleaner conversion to 44.1 due to it being a simple halving instead of 96 to 44.1 which leaves remaining samples to be "smoothed out."

Not right, I'm afraid.

LCD (Lowest Common Denominator) works by getting the ratio between the actual sample rate & the desired sample rate.

With R8Brain Pro, going from 96 to 44.1 is done by upsampling by a factor of 147, then downsampling by a factor of 320.

96000 * 174 / 320 = 44100.

You use an LCD of 300, as this is the LCD - try it.

44100/300 = 147

48000/300 = 160

etc.

You can arrive at the exact math by always dividing the starting sample rate by a factor of 300.

Then divide the required rate by 300.

Reverse the numbers, and you can prove to yourself it works.

Remember - and this is what a lot of people forget - you are not dealing with 88.2, but 88200 - same goes for 96, it's not really 96, but 96000.

So there is absolutely no advantage to be gained by using 88.2 unless you are encoding for CD, and wish to use DTS-Pro, which can be encoded using 88200 and will play back at 44100 (due to clever bits in the encoder) when played through a DTS decoder that does not usually allow 88200 sample rates.

Nearly all SRC these days use LCD, very few use anything else.

Simply halving does not work well, as you will introduce artifacts because of the inevitable rounding that has to occur.

Have you seen the real figures for this stuff on

http://src.infinitewave.ca/
where you will clearly see only the Saracen Weiss is better than R8Brain Pro, and that is a seriously expensive SRC.

And with R8Brain Pro, all noise is below -138dB - in short, inaudible.

Plus - and this is the biggest plus going - R8Brain Pro has a mode called Linear Phase - emulates going through serious, reference quality DA/AD to do the SRC. Sounds a lot better to me than Lin Phase does.