It is currently Tue Oct 24, 2017 12:47 am

All times are UTC - 7 hours





Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: regarding mmc5 sound
PostPosted: Thu Nov 03, 2005 4:37 am 
Offline
User avatar

Joined: Thu Mar 24, 2005 3:17 pm
Posts: 355
1: Other than Just Breed, which games actually use it ?
2: Do the envelopes and length counters get clocked by the APU frame sequencer ?
3: Because there's no sweep, does the sound not get silenced when the raw timer period is less than 8 ?


Top
 Profile  
 
 Post subject:
PostPosted: Thu Nov 03, 2005 9:55 am 
Offline

Joined: Thu Sep 15, 2005 9:23 am
Posts: 1194
Location: Behind you with a knife!
From everynes.htm:

Used by Gun Sight (Laser Invasion), Uchuu Keibitai SDF, Bandit Kings (Suikoden), Castlevania 3, Nobunaga Sengoku (Nobunaga's Ambition 2), Nobunaga Bushou, Shin 4 Nin Uchi Mahjong, Ishin no Arashi, L'Empereur, Ganbare Goemon Gaiden (bugged hack?), Romance of the Three Kingdoms 2 (Sangokushi 2), Gemfire (Royal Blood), Uncharted Waters (Daikoukai Jidai), Aoki Ookami, Just Breed, Metal Slader Glory.

_________________
http://www.jamesturner.de/


Top
 Profile  
 
 Post subject:
PostPosted: Thu Nov 03, 2005 10:12 am 
Wrong. He wants to know the games that use MMC5 *sound*, not the mapper itself. I know Metal Slader (or Slash?) Glory.


Top
  
 
 Post subject:
PostPosted: Thu Nov 03, 2005 10:42 am 
Offline
User avatar

Joined: Fri Nov 12, 2004 2:49 pm
Posts: 7235
Location: Chexbres, VD, Switzerland
Just Breed, and Shin 4 Nin blahblah uses sound in their music, while Metal Slader Glory and Uchuu Kebatai SDF uses it only for sound effects.
Just Breed sometimes write a period of $1 to silent the channel, so the channel should be also silenced. Maybe an ultra-sound is present ?

_________________
Life is complex: it has both real and imaginary components.


Top
 Profile  
 
 Post subject:
PostPosted: Thu Nov 03, 2005 12:08 pm 
Offline
User avatar

Joined: Mon Sep 27, 2004 8:33 am
Posts: 3715
Location: Central Texas, USA
At 1.79 MHz, any wave with fewer than about 81 clocks per cycle will be inaudible (above 22 kHz). If my calculation is right, a raw period of 4 or less will be above 22 kHz (4 results in timer period of 4*2+2=10, and wave period of 10*8=80).


Top
 Profile  
 
 Post subject:
PostPosted: Thu Nov 03, 2005 5:25 pm 
I can hear a 20KHz sine wave, and can kind of feel a 23KHz sine wave. ;b

A super-sonic sound may be considered inaudible if it's playing by itself, but interference with other channels can produce additional, barely audible tones.


Top
  
 
 Post subject:
PostPosted: Thu Nov 03, 2005 5:33 pm 
Offline
User avatar

Joined: Mon Sep 27, 2004 8:33 am
Posts: 3715
Location: Central Texas, USA
The NES audio output includes some kind of low-pass filter (probably for the sake of the RF unit), so it seems heterodyning wouldn't occur anyway.


Top
 Profile  
 
 Post subject:
PostPosted: Fri Nov 04, 2005 9:49 am 
Offline
User avatar

Joined: Fri Nov 12, 2004 2:49 pm
Posts: 7235
Location: Chexbres, VD, Switzerland
Effectivly, a period of $1 would proabably be inaudible, but I'm not sure that programmers would have to do it if it's not proprely silenced... because any cat or dog sleeping in the same room where you're playing Just Breed will fastly wake up and become made to hear those horrible high-pitched tunes. I don't think that the programmers would really do it, but I can't guarantee it. If only I had the real JB cartridge, I could test it with my cat, hehe.

_________________
Life is complex: it has both real and imaginary components.


Top
 Profile  
 
 Post subject:
PostPosted: Fri Nov 04, 2005 11:13 am 
Offline
User avatar

Joined: Thu Mar 24, 2005 3:17 pm
Posts: 355
I got it working (and by assuming answer 2 would be a yes). The only game I've seen using the 8 bit PCM channel is that mahjong game, just watch the demo.


Top
 Profile  
 
 Post subject:
PostPosted: Fri Nov 04, 2005 2:33 pm 
Offline

Joined: Sun Sep 19, 2004 11:12 pm
Posts: 19122
Location: NE Indiana, USA (NTSC)
Bregalad wrote:
because any cat or dog sleeping in the same room where you're playing Just Breed will fastly wake up and become made to hear those horrible high-pitched tunes.

Probably not. Anything over 20 kHz will get filtered out by the TV's speaker. It takes special tweeters to respond decently over 20 kHz.


Top
 Profile  
 
 Post subject:
PostPosted: Sat Nov 05, 2005 3:39 am 
Offline

Joined: Tue Sep 13, 2005 7:53 am
Posts: 98
Actually, Metal Slader Glory uses the additional MMC5 channels in the opening credits theme, ending credits theme, and one or two other tracks.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 7 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group