rec.autos.simulators

CPR sound eats performance.

Grant Reev

CPR sound eats performance.

by Grant Reev » Sat, 08 Nov 1997 04:00:00

I just found an actual use for muting the sound to get performance.
turning the sound off (ctrl-m) in a replay gives a big framerate
increase for me. Even if you have the pre-race music OFF and you
can't hear anything, you still get the same frame rate hit as if
the music/sound is on - so hit ctrl-m anyway. DirectSound
really sucks, i guess. how can it kill the frame rate so much even
when there is no sound being played? Is this a driver issue,
perhaps? i've got the latest AWE64 drivers from Creative, however.
blah:) i dunno.

Eric Strau

CPR sound eats performance.

by Eric Strau » Sat, 08 Nov 1997 04:00:00

The sound impact on perf is news to me. I'll ask dev. I can tell you that
sound isn't free - perhaps some of you saw the feedback on the FlightSim 98
joysticks problems. Problem turned out to be that the default sounds
(higher frequency stereo) were saturating the system & the Joystick input
couldn't get through consistently. We found that by changing to lower
frequency mono sounds the joysticks suddenly started working again. So,
it's quite possible that sounds are impacting perf some.

The drifting when stopped is a bug - it's fairly low priority since you
don't spend much time stopped in an Indycar - still it's something we'll
investigate. As for no standing starts, we do em running because that's the
way the CART organization does them & we wanted to be true to the real
thing.

Great to hear you're getting some entertainment out of the game. I have to
admit I'm a bit envious of 1:05 at Laguna. I trust you weren't using rain
tires :)

Eric.

Rob

CPR sound eats performance.

by Rob » Sun, 09 Nov 1997 04:00:00


> Hey i just found out a brilliant way to improve the framerate
> by like 50%. turn off the sound! (ctrl-m). my framerate jumps
> from 14-19fps to 21-28fps. deaf people have one up on the
> rest of us here:) of course i don't actually race like this
> though, i need the audio input.

> Eric and the other MS guys: how come the sound takes such
> a huge bite out of the performance? it makes no difference if
> i have 8 bit or 16 bit sound, mono or stereo.

After I read your post I decided to give this try, and it really did
boost the performance, but I didn't want to drive without the audio
either.  So, I went back into the sound options to see what else I could
tweak without having to mute the sound.  I changed the Sound Device from
the default "Primary Sound Driver" to my "SB AWE32" sound card, and I
was able to drive with full audio and improved performance as well.

Hope this helps.

Rob C.

Joachim Trens

CPR sound eats performance.

by Joachim Trens » Wed, 12 Nov 1997 04:00:00

Hi Eric,

using rain tires :) <<

How about 1:01.22 on soft, and 1:00.91 on rain? :)

Achim

Grant Reev

CPR sound eats performance.

by Grant Reev » Thu, 13 Nov 1997 04:00:00

Hi jim :)


> >>>I have to admit I'm a bit envious of 1:05 at Laguna. I trust you weren't
> >using rain tires :) <<

> >How about 1:01.22 on soft, and 1:00.91 on rain? :)

> No offense, but I don't believe 1:01.22 on soft tires is possible. I
> realize some people are very fast, but not that fast.

> Are you sure the Hall of Fame bug isn't responsible for that time? I
> had a 1:01 or 1:02 time show up in my Hall of Fame, but I know I
> didn't achieve that.

actually, i have never once had this happen to me yet. what causes it?
any particular situation, which i have yet to run accross?

what do you consider to be a shortcut? all 4 wheels off the track?
any wheels on the dirt on the inside of a curve? i quite often run
a little wide on exit, just touching the dirt, because of sloppy
steering:) i don't really worry about that much because i know that
if i had done the corner well i could have steered through even
faster without running wide, i personally hate the idea of running
off the track to get speed deliberately, and try not to do it. my
best laptime is a 1:04.12 on slicks, which i did in a multiplayer
game while kind of watching TV at the same time, there was no
cutting of corners or anything. i am not an overly fast driver,
so i am not at all surprised that others are down into the 1:02's.
normally i would lap around 1:05-1:06 however.
i have fiddled with my setup somewhat though, to get myself to this
speed:) although the car is now really sluggish to control, compared
to the usual Gp2 car i am used to:)

Getz

CPR sound eats performance.

by Getz » Thu, 13 Nov 1997 04:00:00

-- some parts snipped --

I don't know what causes it. It has happened to me perhaps 3-4 times
(although it hasn't in awhile). I know it has happened to others as
well. You might not realize it happened if you weren't paying
attention to your lap times as you were driving.

Let me first say that I'm not trying tell anyone how to drive a sim or
what should or shouldn't be allowed. That said, for "official lap"
purposes, I think that at least 2 wheels should be on the track at all
times. I have seen such a guideline before on web sites that collect
hot laps.

I downloaded a replay of a 1:02.xx time someone had, and the driver
was all the way off the track more than once in very advantageous
places (such as coming out of Turn 2).

The problem is that in some sims (CPR included), the off track
materials (dirt, grass, kitty litter) isn't modeled quite right, and
it can be too foregiving to the driver. I don't believe in
intentionally taking advantage of that shortcoming.

By the way, my best is 1:07 (with the full version), but I can
envision a 1:05 or 1:06 lap if I run it perfectly. But I can't see how
a sub 1:02 is possible if I stick to my personal guidelines.

That 1:04 is a great lap and consistent 1:05's and 1:06's is awesome.
Given that you aren't surprised that folks are running 1:02's and
given the apparent ease in which you accomplished your 1:04 (watching
TV!), and given the quantity of people (not just one or two world
champs) that are posting 1:02 or better times, I wonder if there isn't
more to the story that we realize. Do you have the trial version?
Perhaps there is a difference between the trial version and the gold
version (mine)?

Of course there is always the chance that I am just not that good and
don't realize it. I do have quite a bit of sim experience and, in all
humility, I like to think I can hold my own against stiff competition
(and have done so), but you never know. Oh well, if I say any more it
will sound like I'm whining, and that is certainly not my intention.
Back to practice!

Jim Getzen

---------------------------------------------
Unofficial CART Precision Racing Headquarters
http://members.home.net/getzen/
---------------------------------------------

John Walla

CPR sound eats performance.

by John Walla » Thu, 13 Nov 1997 04:00:00



Jim, Achim really _is_ that fast. Over on CompuServe he has been
dubbed "A.C.H.I.M.", A Computerised HotlappIng Machine. I've seen
Achim turning stunning laps firstly in ICR2, then GP2, Monster Truck
Madness, the occasional dabble in NASCAR2 and now CPR. Whatever you
think the limits are, this guy will redefine them.

Achim mentioned that he had a 56s lap due to the HOF bug, but the 1:01
and 1:02 laps are clean. The other thing about Achim is that he is
_scrupulously_ honest, and a lap will never see the public eye unless
it is legal in every sense.

If you ask for an e-mail of the replay I'm sure you'll get one, and
then prepared to be staggered! :) FWIW I've already done a 1:24.9
around Surfer's Paradise and there's easily another one or two seconds
there if I could hook up a mistake free lap. There's a lot of fat to
be chopped out of those hotlaps yet!

Cheers!
John

Richard Walk

CPR sound eats performance.

by Richard Walk » Fri, 14 Nov 1997 04:00:00



I've known Achim for over a year and can vouch that he _is_ that fast!

I've got a 49 second HoF time <g>

I've done a 1:03 (minor use of gravel exiting a couple of corners) but
can't get within 2 seconds of my rain tyre time using softs. My driving
style is really suited to hotlapping these days though ;-)

Cheers,
Richard

Richard Walk

CPR sound eats performance.

by Richard Walk » Sat, 15 Nov 1997 04:00:00


>Achim needs his head examined. I've raced sims for 6 years, and the best
>I can do at Laguna is 1:06.78 with soft tires, little wing and a nearly
>empty tank.

>1:01??? Don't think so! This game is as real as it gets from a physics
>point of view anyway. Unless Someone can do the corkscrew in 6th, 1:01
>just isn't real

Hang around the Zone sometime and get yourself thrashed by Achim, you
might just believe it then!

Why do people always assume that just because they can't do such fast
times that others can't?

Cheers,
Richard

Jim Getze

CPR sound eats performance.

by Jim Getze » Sat, 15 Nov 1997 04:00:00


>Achim needs his head examined. I've raced sims for 6 years, and the best
>I can do at Laguna is 1:06.78 with soft tires, little wing and a nearly
>empty tank.

>1:01??? Don't think so! This game is as real as it gets from a physics
>point of view anyway. Unless Someone can do the corkscrew in 6th, 1:01
>just isn't real

>> Jim, Achim really _is_ that fast. Over on CompuServe he has been
>> dubbed "A.C.H.I.M.", A Computerised HotlappIng Machine. I've seen
>> Achim turning stunning laps firstly in ICR2, then GP2, Monster Truck
>> Madness, the occasional dabble in NASCAR2 and now CPR. Whatever you
>> think the limits are, this guy will redefine them.

Well, I have managed to get my own time down to 1:05.68 thanks to a new
setup. I felt like I was absolutely perfect the whole way around, although
I'm sure there is still some room for improvement (isn't there always?).
Still, I don't see how 1:01.xxx is *possible*. I can't imagine such a lap,
since I don't know where the 4+ seconds of time savings could possibly come
from. I guess I would have to see Achim in action!

I have raced two or three times on the Zone against "StealthRacer" (Arthur
Axelrad, I believe). He is unbelievable (should put him up against
Achim!) -- I think he averaged about 1 second per lap faster than me during
a 12 lap race at Portland, and I was running personal best laps (57.xx's).
I'll bet he had a low 55.xx lap in there somewhere. He is also consistent,
not just a hot lapper, which really impresses me. Apparently, he has won
several ICR2 leagues, etc. etc. If I extrapolate that kind of performance to
Laguna, and take even two seconds off my 1:05.68 time, I still get 1:03.6
and not 1:01s.

Side note: I looked at some hot lap setups (1:01 and 1:02 times) and all of
them used rain tires. It makes me wonder about the other conditions of the
hotlap. Perhaps traction control on? No tire wear? Boosted air temp to
improve grip? No fuel consumption? (two of the setups had 1 gallon of fuel,
not enough to do a hot lap with fuel consumption turned on). Shortcuts?

It can certainly be argued that any and all options can and should be
exploited by the pure hotlapper, short of hacking the program, but I
personally don't subsribe to that. I guess that is one reason why I'm not a
great hotlapper (the other reason being my lack of skill)!

No doubt about the fat. That is a good Surfer lap. I've done a 1:26.05, but
I haven't spent that much time there. I am pretty sure I can get down to the
1:24.xx range with some work and practice. Something to think about: judging
from the Laguna hot laps, which are, say, 6 seconds faster than what I
consider to be a solid lap (1:07), then the best laps at Australia might be
7-8 seconds faster (given the longer lap) than a solid Aussie lap (say 1:25)
which means the best should be around 1:18 or 1:19. Think it is possible? By
the same token, should we expect a 50.xx second lap at Portland? :-)

Unrelated side note: despite CPR's flaws in terms of the AI, etc. (which
will hopefully be patched), I have to say that just about every track is
simply a blast to drive, even those that I hated driving in ICR2, such as
Australia and Detroit. I can't quite put my finger on it, perhaps the tracks
are wider, or maybe it is that the car simply has better performance (too
much so?), but I find myself having a ball now "rediscovering" some of the
tracks I had dismissed from ICR2.

Jim Getzen

Unofficial CART Precision Racing HQ
http://members.home.net/getzen/

John Walla

CPR sound eats performance.

by John Walla » Sat, 15 Nov 1997 04:00:00



First of all, unless you wrote the physics engine you can't know if
it's as real as it gets. I personally have grave doubts.

Secondly, I've thought the same thing about some of Achim's laptimes
in every sim he's tried, but plenty of other guys like Richard Walker,
Michael Wollenschein, Ralf Tzschoppe, Georg Naujoks etc are always
snapping at his heels, so the times are possible.

We just need an open mind and more practice :)

Cheers!
John

Clay Knigh

CPR sound eats performance.

by Clay Knigh » Sat, 15 Nov 1997 04:00:00

Achim needs his head examined. I've raced sims for 6 years, and the best
I can do at Laguna is 1:06.78 with soft tires, little wing and a nearly
empty tank.

1:01??? Don't think so! This game is as real as it gets from a physics
point of view anyway. Unless Someone can do the corkscrew in 6th, 1:01
just isn't real




> >No offense, but I don't believe 1:01.22 on soft tires is possible. I
> >realize some people are very fast, but not that fast.

> Jim, Achim really _is_ that fast. Over on CompuServe he has been
> dubbed "A.C.H.I.M.", A Computerised HotlappIng Machine. I've seen
> Achim turning stunning laps firstly in ICR2, then GP2, Monster Truck
> Madness, the occasional dabble in NASCAR2 and now CPR. Whatever you
> think the limits are, this guy will redefine them.

> >Are you sure the Hall of Fame bug isn't responsible for that time? I
> >had a 1:01 or 1:02 time show up in my Hall of Fame, but I know I
> >didn't achieve that.

> Achim mentioned that he had a 56s lap due to the HOF bug, but the 1:01
> and 1:02 laps are clean. The other thing about Achim is that he is
> _scrupulously_ honest, and a lap will never see the public eye unless
> it is legal in every sense.

> >In my view, a 1:05.xx or 1:06.xx at Laguna is staggeringly fast with
> >soft tires and no shortcuts.

> If you ask for an e-mail of the replay I'm sure you'll get one, and
> then prepared to be staggered! :) FWIW I've already done a 1:24.9
> around Surfer's Paradise and there's easily another one or two seconds
> there if I could hook up a mistake free lap. There's a lot of fat to
> be chopped out of those hotlaps yet!

> Cheers!
> John


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