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From: Amavect <amavect@gmail.com>
To: 9front@9front.org
Subject: Re: [9front] games/snes audio patches
Date: Tue, 16 Feb 2021 23:31:21 -0600	[thread overview]
Message-ID: <8FC6C05D-B926-418D-AF92-957C3D2D488A@gmail.com> (raw)
In-Reply-To: <E11041E82294C6367F454FD9D2B81DF9@wopr.sciops.net>

All,

Here's something I dug up.
http://yehar.com/blog/?p=197
It has sample code for a ton of filters.
A great deal of analysis is on 2^n-oversampled audio, which we aren't doing. There's a specific recommendation for 4-point Hermite interpolation in this case if you want high quality and speed.

Section 7.
"Also, it shall only be commented that using polynomial interpolators with unoversampled input is a choice that can only be made when the quality is not that important but speed is essential, the most useful interpolators in that case being linear and 4-point Hermite, and Watte tri-linear, which is somewhere between those two in both quality and computational complexity."

Thanks,
Amavect

  reply	other threads:[~2021-02-17  5:36 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-15 10:25 Michael Forney
2021-02-15 10:55 ` Steve Simon
2021-02-17  0:05 ` qwx
2021-02-17  5:31   ` Amavect [this message]
2021-02-17  9:10     ` hiro
2021-02-17  9:32       ` Steve Simon
2021-02-17  9:57         ` hiro
2021-02-17 10:24           ` qwx
2021-02-17 10:53     ` hiro
2021-02-21 11:06 ` [9front] " Michael Forney
2021-02-22  0:32   ` qwx
2021-02-22 15:15   ` qwx

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