Re: FLASH: (newbie) Audio/Memory problem

[Marc Hoffman, Poison Dart Frog Media]

At 04:17 PM 3/3/00 , you wrote:

>  * * * * * * * * * *

>I need to be alot more clear (I should have stated this in

>the first place).

>

>My problem is, I have a 1,125 KB audio which they

>INSIST must be used for the :50 second flash animation.

>All symbols were created with flash 4.0. It has ~34 layers

>of animation.

>It is not going to posted on a web site, but rather used for

>a presentation.

>

>I have a desktop computer and I haven't checked what the

>speed of it is, but I know it's 400+ MHz Pentinum II(? Need to check).

>

>The presentation, however, will be playing on a laptop,

>which has limited memory and I'm not sure what it is

>(could be a 120 MHz for all I know). It plays incredibly

>show on there, the audio pauses and the animation plays

>much slower than the audio.



This will be largely affected by the graphics display card, video RAM, as 

well as CPU speed and system RAM. Preloading really should not matter, but 

if you're running off a CD you will see improved performance by copying it 

to the hard disk and running off that instead.




>I have tried adding a "pre-loader" to help this and it did help

>some, but it still is slower than it should be (animation ends some 10 seconds

>after the audio ends).


To force the animation to keep up with the audio, set the audio sync type 

to "Stream." Flash may, however, drop some graphics frames in order to 

achieve this.




>The audio was set @ the default in the flash publish settings,

>but I had the .wav file created with these settings:

>

>Format:PCM

>Attributes: 11,025 Hz, 8 Bit, Stereo     22KB/s

>Could this be the problem?



I'd suggest you convert to mono (can do this in the Flash export) to cut 

file size in half. 8bit is marginal for music-quality audio; it's better 

suited for voice only, since you lose a lot of fidelity with 8-bit (as 

compared to 16-bit, which is more the standard). If the source files are in 

16-bit, you'll get much better quality by preserving the 16-bit. Between 

converting stereo to mono and preserving 16-bit depth, you'll end up with 

the same size file you have now.




Marc Hoffman


Poison Dart Frog Media: Specializing in Flash Animation and Digital Audio 

Production

Our latest Flash job is on display at <http://www.dartfrogmedia.com/rickfrnd>

See our Flash portfolio at <http://www.dartfrogmedia.com/portfolio>

(featured in Flash 3 Web Animation, by Ken Milburn)



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