Good post, one quibble

Computer Audio Asylum

Music servers and other computer based digital audio technologies.

Posted by Dave_K on January 3, 2020 at 15:15:15

In Reply to: RE: Upsampling posted by soundchekk on January 3, 2020 at 00:20:31:

I liked the point you made about needing to understand how the DAC works in order to come up with an informed approach. With some combinations you could have overlapping filter transition bands with unpredictable results.

My one quibble is about high sample rate filters being less aggressive. You said: "Further @ these high samplerates filters can be configured much less aggressive." That's not really so. Filter slope can be set independently from sample rate.

I'm assuming the goal of software upsampling is to be in control of the reconstruction filter. If you have 44.1k in and 352.8k out to the DAC, that will take the DAC's reconstruction filter out of the equation in most cases. But the upsampling filter will require a stop band at 22.05k to be "ideal", and you'll make the same tradeoffs between stop band rejection and impulse response that you would if you're a DAC designer.

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Follow Ups Full Thread

Topic - Upsampling - Dawnrazor 17:08:03 01/02/20 (19)

RE: Upsampling- Update - Dawnrazor 18:07:14 01/09/20 (4)

RE: Upsampling- Update - AbeCollins 19:58:06 01/09/20 (3)

RE: Upsampling- Update - Dawnrazor 16:09:26 01/10/20 (2)

RE: Upsampling- Update - AbeCollins 11:17:10 01/11/20 (1)

RE: Upsampling- Update - Dawnrazor 17:09:44 01/11/20 (0)

RE: Upsampling - Todd Krieger 18:47:47 01/05/20 (0)

Audirvana allows it... - Ivan303 16:36:30 01/04/20 (0)

RE: Upsampling - Mike B. 13:48:49 01/04/20 (0)

RE: Upsampling - zacster 07:07:20 01/04/20 (0)

RE: Upsampling - Mel 08:43:21 01/03/20 (1)

RE: Upsampling - Dawnrazor 09:58:29 01/03/20 (0)

RE: Upsampling - soundchekk 00:20:31 01/03/20 (3)

Good post, one quibble - Dave_K 15:15:15 01/03/20 (0)

RE: Upsampling - Dawnrazor 09:57:27 01/03/20 (1)

RE: Upsampling - soundchekk 05:26:53 01/04/20 (0)

RE: Upsampling - John Elison 19:30:06 01/02/20 (1)

RE: Upsampling - Dawnrazor 09:59:14 01/03/20 (0)

RE: Upsampling - AbeCollins 18:15:58 01/02/20 (1)

RE: Upsampling - Dawnrazor 18:48:16 01/02/20 (0)

Follow Ups

Good post, one quibble - Dave_K 15:15:15 01/03/20 (0)

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