Re: FLASH: sounds...i need help~!

[John Croteau]

Hi Thien and all,


> i imported a wav file into flash but it turns out to be abnormal when i

> play it...how can i play it or make it sound like the actualy sound...

> when i open the file using media player it sounds like it's supose to be.

> when i tested it it was slower than my actual wav file.


When compressing (reducing file size) audio for use on the Web (or in

Flash) there are often problems. Flash and other programs can reduce

audio file size in two ways. One is by reducing the Sample Rate (Rate:)

and the other reducing the Bit Depth (Compression:). Both of these

reduce the amount of detail used to store an audio file.  Though they

modify the signal in different ways the most noticeable effect of both

is usually the loss of high frequencies. This loss of high frequencies

is often perceived to be a speed change (pitch).


The key to making digital audio files that are small is to create or

modify the audio composition to rely on mid frequencies instead of

higher frequencies.


Better results are usually accomplished when the sample rate is reduced

by an even multiples (Reduce 44K to 11K for example).


Flash's default compression is 11K and 4 bit. If the original file is of

high quality you will get better audio results with the use of 22K or

44K and no Bit Compression but of course the file size will be larger.

Use of stereo always doubles file size and is almost always a luxury

that must be sacrificed for general Web use.


Testing the different audio settings is the only sure way to know how a

particular piece will sound at various Flash Sample Rate/Compression

settings. Experiment and test.


-----------                               -----------------------

John Croteau

croteauerols [dot] com (mailto:croteauerols [dot] com)

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