[hatari-devel] DC and Subsonic IIR Filter for Digi Sound

[Anders Eriksson]

On Fri, 28 Oct 2011, David Savinkoff wrote:

> Here is a real DC and Subsonic filter for the ultimate in sonic experience.
> Deep stirring bass tones are clearly defined with this digital infinite
> impulse response filter. Punchy walking bass lines with subtle nuances in
> attack are cleanly transmitted to round out the bottom end. :)

Hi!

Interesting work, is there something special one have to do to activate 
it after compile time? I applied the patch, it seemed to go ok:

ae$ patch <../../sound.c.2011oct28c.diff
(Stripping trailing CRs from patch.)
patching file sound.c
QuadMBP:src ae$

Both linear and table mixing sounds just like the original Hatari 1.5 
here. Your previous patch from Aug 5 had much better audio on the Linear 
mixing mode.

Here are some comparisons of YM sample quality on Hatari 1.5, with your 
Aug 5 patch and a real machine.

http://ae.dhs.nu/tmp/sound/

All normalized to 0 dB to have equal volume. I'd say your Aug 5 patch is 
by far the best we have yet :) Looking forward to see if your new patch 
from today is possible to activate.

--
Anders Eriksson
ae at dhs.nu     http://www.dhs.nu/
ae at atari.org  http://www.atari.org/