http://vcone.wordpress.com/2011/12/07/mp3-speed-adjust-with-as3/

There's a link to the zip (FLA + AS file) for those who want to study the code. Thanks, V.C

Cheers. -Amitabh

First install Flex SDK (I am using Kubuntu):

http://www.dotkam.com/2009/03/29/adobe-flex-in-ubuntu-develop-compile-and-run/

Then add the lib directory at the same level as com

etienne@etienne-laptop:~/ff/Dropbox/Xchange/dashboard/flash/sounds/dynamic_mp3_player_2.1/dynamic_mp3_player_2/src$ ls -ltrR
.:
total 52
-rw-r--r-- 1 etienne etienne 408 2011-01-24 14:20 MP3PlayerUI.mxml
-rw-r--r-- 1 etienne etienne 1866 2011-01-24 14:20 MP3PlayerUIClass.as
drwxr-xr-x 3 etienne etienne 80 2011-01-24 15:32 com
drwxr-xr-x 3 etienne etienne 72 2011-01-26 12:49 org
-rw-r--r-- 1 etienne etienne 43910 2011-01-26 18:08 MP3PlayerUI.swf

./com:
total 0
drwxr-xr-x 4 etienne etienne 104 2011-01-24 15:32 kelvinluck

./com/kelvinluck:
total 0
drwxr-xr-x 3 etienne etienne 72 2011-01-24 15:32 audiotools
drwxr-xr-x 2 etienne etienne 80 2011-01-24 15:32 audio

./com/kelvinluck/audiotools:
total 0
drwxr-xr-x 2 etienne etienne 112 2011-01-24 15:32 view

./com/kelvinluck/audiotools/view:
total 8
-rw-r--r-- 1 etienne etienne 2012 2011-01-24 14:20 WavViewer.as
-rw-r--r-- 1 etienne etienne 3144 2011-01-24 14:20 WavRenderer.as

./com/kelvinluck/audio:
total 4
-rw-r--r-- 1 etienne etienne 2873 2011-01-24 14:20 MP3Player.as

./org:
total 0
drwxr-xr-x 3 etienne etienne 72 2011-01-26 12:49 audiofx

./org/audiofx:
total 0
drwxr-xr-x 2 etienne etienne 240 2011-01-26 12:49 mp3

./org/audiofx/mp3:
total 32
-rw-r--r-- 1 etienne etienne 4985 2011-01-24 14:20 MP3FileReferenceLoader.as
-rw-r--r-- 1 etienne etienne 1466 2011-01-24 14:20 ByteArraySegment.as
-rw-r--r-- 1 etienne etienne 2028 2011-01-24 14:20 MP3SoundEvent.as
-rw-r--r-- 1 etienne etienne 8126 2011-01-24 14:20 MP3Parser.as
-rw-r--r-- 1 etienne etienne 7521 2011-01-24 14:20 SoundClassSwfByteCode.as

and finally run
mxmlc MP3PlayerUI.mxml

This produces the much expected MP3PlayerUI.swf

My God, I am compiling Flash from Ubuntu, I can't believe it. Now I will go to the AS3 code. Thanks Kelvin for sharing the code.

I am discovering Flash with your example because it is using the pitch change that I need.
I am a newbee in Flash, and it looks like an FLA file is missing in your sources.
I know my question is very basic, but are your source complete ?

Good example..... but when we are changing speed, the pitch of voice is also changed. So, how to change speed of voice (tempo) by keeping pitch of voice constant and vice-versa. Please reply me as soon as possible.

Thanks.

Thank you for your code!

Here are a few issues I ran into / caveats:

1) For the stuttering when looping, it is indeed due to fact that MP3s have to be specially massaged to loop properly. The tool mp3loop.exe (see earlier message) in conjunction with Audacity worked well for me.

2) The stop() method didn't work for me until I added weak referencing to the event listeners, like so:

_dynamicSound.addEventListener(SampleDataEvent.SAMPLE_DATA, onSampleData, false, 0, true);

(...)

_dynamicSound.removeEventListener(SampleDataEvent.SAMPLE_DATA, onSampleData, false);

3) One weirdness, on Android:

int(mp3.length * 44.1) != bytes.length / 8

Here I am referring to the old version of the code. Those two statements are equivalent on the desktop BUT not on Android (they're NEARLY the same on Android -- I think it might be a bug with AIR Android).

4) int(_phase - startPosition) * 8 is faster with bitshifting: int(_phase - startPosition) << 3

It's great what you did in this experiment. And Its great that you answer to other user's questions. Big ups!