[ scummvm-Feature Requests-812913 ] ST sound

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Sat Sep 27 19:14:17 CEST 2003


Feature Requests item #812913, was opened at 2003-09-26 08:57
Message generated for change (Comment added) made by fingolfin
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=418823&aid=812913&group_id=37116

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Thomas Combeleran (hibernatus)
Assigned to: Jochen Hoenicke (hoenicke)
Summary: ST sound

Initial Comment:
PlayerV2 without the lowpass filter sounds very close to 

the original ST engines.

So adding an option to disable the filter would be nice.

But is still doesn't sound perfect:



ST emulator without any filter:

http://hibernatus34.free.fr/pv/saint_raw.wav

ScummVM without the lowpass filter:

http://hibernatus34.free.fr/pv/scummvm_raw.wav



ST emulator with its (light) filter:

http://hibernatus34.free.fr/pv/saint_lowpass.wav

ScummVM with the filter:

http://hibernatus34.free.fr/pv/scummvm_lowpass.wav



(The ST emulator really sounds nearly perfect)



What's strange is that all the samples in the ScummVM 

output are positive. Is it a bug?



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>Comment By: Max Horn (fingolfin)
Date: 2003-09-27 19:14

Message:
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Regarding your question: "What's strange is that all the samples in 

the ScummVM  output are positive. Is it a bug?"



-> it would seem to me that it is a bug, yeah. I noticed earlier 

that Player_V2::squareGenerator generates only positive samples, 

and wondered about it, but at that time didn't want to mess with 

code that *seems* to work - rather let hoenicke do that :-). 

Player_V2::lowPassFilter() also would have to be "fixed", I guesss, 

maybe more.

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