Testing SRC algorithms - bdiament

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Testing SRC algorithms

Posted by bdiament (A) on September 9, 2004 at 07:39:03

In Reply to: Re: RE:? posted by Bob Track on September 9, 2004 at 07:13:13:

Hi Bob,

The only one of those I have direct experience with is Wavelab where the sample rate conversion algorithms are quite good (no complaints).

One way to compare the applications you have access to is to take a swept sine wave (say 1kHz to ~20kHz) and convert it's sample rate, then listen to the results.

I've done this with the SRC algorithms in a number of applications (mostly on the Mac, which is what I use most but also with Wavelab on the PC). The results can be quite shocking as many SRC processes will leave a distinct "boing-y" quality on the swept sine wave, a product of their aliasing artifacts. Some have a bit less "boing" than others but may have artifacts that start lower down in frequency. Still others leave no audible artifacts.

The link below will take you to a page where similar tests have been done. Some of the samples may already be outdated though, since I know BIAS is working on a new SRC algorithm for Peak and so is i3 for DSP-Quattro.
Note that many computer speakers won't reveal what the tests can show. You need good monitors (or good headphones).

Hope this helps.

Happy Listening!
Barry

Barry Diament Audio
New York

Some SRC samples (Open in New Window)

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Follow Ups Full Thread

Topic - Burning Programs - Bob Track 08:55:43 09/07/04 (14)

RE:? - RBP 23:04:31 09/07/04 (13)

Re: RE:? - Bob Track 04:47:23 09/08/04 (12)

Re: RE:? - RBP 06:45:15 09/08/04 (11)

Re: RE:? - Bob Track 10:36:59 09/08/04 (10)

Re: RE:? - RBP 20:07:17 09/08/04 (9)

Re: RE:? - Bob Track 04:30:01 09/09/04 (8)

Re: RE:? - bdiament 06:11:02 09/09/04 (7)

Re: RE:? - Bob Track 07:13:13 09/09/04 (6)

Testing SRC algorithms - bdiament 07:39:03 09/09/04 (5)

Re: Testing SRC algorithms - how did Spark XL do? - BenF 16:33:29 09/10/04 (1)

Re: Testing SRC algorithms - how did Spark XL do? - bdiament 02:50:05 09/11/04 (0)

Berry. - RBP 01:18:01 09/10/04 (1)

You've got mail - bdiament 05:40:37 09/10/04 (0)

Re: Testing SRC algorithms - Bob Track 08:12:55 09/09/04 (0)

Follow Ups

Testing SRC algorithms - bdiament 07:39:03 09/09/04 (5)

Re: Testing SRC algorithms - how did Spark XL do? - BenF 16:33:29 09/10/04 (1)

Re: Testing SRC algorithms - how did Spark XL do? - bdiament 02:50:05 09/11/04 (0)

Berry. - RBP 01:18:01 09/10/04 (1)

You've got mail - bdiament 05:40:37 09/10/04 (0)

Re: Testing SRC algorithms - Bob Track 08:12:55 09/09/04 (0)

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