A short run of a Sonic game that hasn't had any obsoleted movies? I haven't been too interested in doing TASes lately but I couldn't help myself from improving it. The old run was well-optimized (with solid routes) and broke the game pretty thoroughly, so this ended up being less than 40 seconds faster, but I think it's still a significant improvement considering the game.
I used Gens 10a with the Sonic CD Camhack/Speedometer/SolidityViewer/HitboxDisplay enabled to make this. Thanks to Upthorn for making and releasing such good tools for TASing this game, and also for making the first version of this run (which I used a lot of ideas from).

Goals

These are the same goals as Upthorn used. In order of highest to lowest priority:
  • No time travelling or level restarting
  • Fastest in-game time
  • Fastest real time

Categories

  • Aims for fastest (primarily in-game) time
  • Takes damage to save time
  • Abuses programming errors
  • Ignores semi-important goals in the game

Level breakdown

LevelTimeOld TimeSeconds SavedNotes
Palmtree Panic 10'20"750'21"010.26Better angle on the high jump after getting the speed shoes
Palmtree Panic 20'16"600'16"800.20Took a slightly lower route
Palmtree Panic 30'17"710'17"880.17Hit the spring faster, manipulated boss to spawn earlier
Collision Chaos 10'15"830'15"830.00Very minor changes (no improvements found)
Collision Chaos 20'22"060'24"312.25Faster speedshoe route, skipped peelout at end
Collision Chaos 30'03"350'03"350.00Very minor changes (no improvements found)
Tidal Tempest 10'21"380'22"651.27Jumped to avoid walking down a slope underwater, early peelout speed trick at end
Tidal Tempest 20'31"650'40"618.96Went through wall to skip part of the route
Tidal Tempest 30'23"900'30"136.23Zipped in a different place to reach the boss sooner
Quartz Quadrant 10'18"650'19"550.90Rolled for faster speed off the first ramp
Quartz Quadrant 20'17"910'18"860.95Zip-launched into a lower route at the end
Quartz Quadrant 30'50"860'52"061.20Saved time by not skidding on the treadmill
Wacky Workbench 10'22"030'25"383.35Similar but crazier route
Wacky Workbench 20'27"250'29"482.23Didn't let the time posts slow me down, actually they helped a little
Wacky Workbench 31'03"051'04"901.85Zipped differently to reach the boss sooner
Starlight Speedway 10'14"750'15"080.33Would have been faster but the camera got too far behind for further optimizations to make any difference
Starlight Speedway 20'17"630'18"661.03Went enough faster to skip another loop
Starlight Speedway 31'05"011'05"800.79Saved time by making the game think the race was a close call at the end (Robotnik speeds up... and gets green jets?)
Metallic Madness 10'18"710'20"581.87Got enough speed to jump through the last wall
Metallic Madness 20'23"610'26"582.97Handled the circular conveyor belts faster, zipped for a speed boost at the end
Metallic Madness 31'07"561'09"401.84Faster zip, manipulated the bug things to be closer together
Total Time 29'40"2510'18"9038.65In summary... went faster?

Emulator Settings

  • Emulator: Gens 10a
  • Bios used: v1.10 (U)
  • Sound: 44100 KhZ
  • Options: Sega CD SRAM Size = 64 KB
This movie happens to stay synchronized regardless of whether "Perfect SegaCD Synchro" is on, so if SegaCD emulation is chuggy on your computer, it might help to turn that option off for this movie. It would also help to use BIN+CUE instead of ISO+MP3, because it takes more processing power to decode MP3s than to not decode them.

Desync Issues

If you're getting desyncs, first make sure you're using the correct ROM and BIOS and emulator version and settings as described above. And don't try to load a mounted disc with "Boot CD", just use Open ROM on the file like normal.
Also make sure you have the right number of audio tracks on the CD... if you're using a cue file that means your cue file needs to have the right number of correctly indexed audio track sections, if you're using MP3s that means you need exactly 34 MP3s named properly and in the same directory as your ISO (if the ISO is "Sonic CD (U).iso" then the MP3s should be "Sonic CD (U) 02.mp3" through "Sonic CD (U) 35.mp3"). The actual contents of the audio tracks can be almost anything, but the number of audio tracks has to be correct otherwise the emulated loading times will be different enough to cause a desync.

Music

This was made with the US version of the game, but if you prefer the music from the Japanese version, you can tell Gens to run the US game but use the music from the Japanese game. The way of doing this depends on whether you are using ISO+MP3 or BIN+CUE. If you are using MP3s, simply replace the MP3 files with the ones from the Japanese version. If you are using BIN+CUE, you can edit the CUE file of the (J) version to use the (U) version for track 01 (data) and use the (J) version starting at track 02 (audio). It should look like this, except with the filenames matching the ones you have:
FILE "Sonic CD (U).iso" BINARY
  TRACK 01 MODE1/2352
    INDEX 01 00:00:00
FILE "Sonic CD (J).iso" BINARY
  TRACK 02 AUDIO
    PREGAP 00:02:00
    INDEX 01 12:14:49
  TRACK 03 AUDIO
    INDEX 00 12:18:63
    INDEX 01 12:20:63
  TRACK 04 AUDIO
...and so on...
One thing those won't work for, though, is the ending music. For that, you'll have to use the actual Japanese version of the game, not only the Japanese audio tracks. You'll also have to use a different version of the movie file for it to sync and version 1.00 of the Japanese MegaCD BIOS. Be warned that Quartz Quadrant has slightly slower in-game times than in the US version (differences during lag frames) even though the movie is about 10 seconds shorter (mostly due to shorter level end music).

NesVideoAgent: Hi! I am a robot. I took a few screenshots of this movie and placed them here. I'm not sure I got the right ROM though. (I tried Sonic The Hedgehog (MP).gen, which was the closest match to what you wrote.) Well, here goes! Feel free to clean up the list.
BoltR I choose to clean them all, as that is very much the wrong ROM.

mmbossman: Impressive work. Nice to see you back nitsuja. Accepting as an improvement to the published movie.

Raiscan: Processing.

Post subject: Movie published
TASVideoAgent
They/Them
Moderator
Joined: 8/3/2004
Posts: 14903
Location: 127.0.0.1
This movie has been published. The posts before this message apply to the submission, and posts after this message apply to the published movie. ---- [1188] SegaCD Sonic the Hedgehog CD by nitsuja in 17:27.65
Joined: 5/9/2005
Posts: 748
Again, thanks for the 2 AVIs, with the two music tracks.
Reviewer, Active player (277)
Joined: 12/14/2006
Posts: 717
Man that Amy sure is clingy, and she has a strong grip, too.
Joined: 11/4/2007
Posts: 1772
Location: Australia, Victoria
Uploaded. Part 1 Part 2 Someone please provide Stereo links.
Joined: 1/14/2005
Posts: 216
Doesn't really matter but suggestion if this comes up again: one movie file, multiple audio tracks.
"I think happiness is just being able to loaf without stress." http://speeddemosarchive.com/
Joined: 11/11/2006
Posts: 1235
Location: United Kingdom
Fraid not. Try running both movies next to each other and you'll see why. the Japanese version is shorter.
<adelikat> I am annoyed at my irc statements ending up in forums & sigs
Joined: 1/14/2005
Posts: 216
I only know the US version, but that's nothing that can't be worked around with some manual synching. Maybe not worth the effort though, so I can understand that.
"I think happiness is just being able to loaf without stress." http://speeddemosarchive.com/
Joined: 3/11/2008
Posts: 583
Location: USA
Large difference: at ends of levels when not getting maximum speed bonus, the US endtheme is longer, and thus the score count screen waits on it, a difference of several seconds per applicable level. Small difference: lag frames.
Active player (417)
Joined: 8/22/2008
Posts: 301
Location: Brazil
Nitsuja ---> TASing genius.
Joined: 2/26/2007
Posts: 1360
Location: Minnesota
Marcokarty wrote:
Nitsuja ---> TASing genius.
You said what we all have been thinking for ~4 years :P
adelikat wrote:
I very much agree with this post.
Bobmario511 wrote:
Forget party hats, Christmas tree hats all the way man.
Active player (417)
Joined: 8/22/2008
Posts: 301
Location: Brazil
Well... At least the newbies know this now.
NESAtlas
He/Him
Player (56)
Joined: 7/4/2010
Posts: 114
Location: Gales Ferry, CT
Player (51)
Joined: 4/10/2009
Posts: 226
thats too awesome, I want to see the TASes of all the main series done that way.