Comments on: Using AS3’s computeSpectrum

By: ruud

ruud — Thu, 11 Jun 2009 19:00:14 +0000

herman is right… thnx!

By: Bhanu

Bhanu — Fri, 17 Apr 2009 08:31:15 +0000

Is it possible to display the spectrum of Mic input in flash?

By: Wesley

Wesley — Tue, 27 Jan 2009 22:17:13 +0000

Sick brother Scaffolding it now and will post what I come up with ~ Basic

By: Adam

Adam — Wed, 15 Oct 2008 07:43:54 +0000

This applies for both Morten and Sumant…

The “ba” variables values from 0 to 255 are for left, 256 to 512 are right channel.

Divide these two ranges into three sections (0-85, 85-170, 170-255 for Left Low, Left Mid, Left High) and sum these values. Keep in mind that sound is logarithmic though, 0-85 will probably be FAR too large a range to show bass.

Once you can find these individual values, you could log them through the entire song or clip. Only problem is, this only displays values for sounds currently playing, so you would have to actually PLAY through the whole thing to poll all the values.

One question…. Why do you need something this complex? Top of the line studio software doesn’t really even have high/low timeline waveform display, why should you need it in flash?!?

By: herman

herman — Mon, 28 Jul 2008 05:56:05 +0000

Hi Prince,
I think you should add ‘public’ on SpectruAnalyzer class
public class SpectrumAnalyzer extends Sprite { …..

By: jakub

jakub — Fri, 04 Jul 2008 14:49:49 +0000

if anyone will find it hlepful…
to avoid error 1046, write
public class SpectrumAnalyzer extends Sprite
instead of
class SpectrumAnalyzer extends Sprite
to make class public to be seeable from outside its package.

By: Damian

Damian — Thu, 29 May 2008 01:49:35 +0000

So does the class (sorry for double post)

By: Prince

Prince — Thu, 17 Jan 2008 05:40:35 +0000

Hi,

I’m working with Flash 8 for nearly 1 year. I could understand the AS2 but to the AS3 I’m a newbie. Tried your code but it shows this,

“1046: Type was not found or was not a compile-time constant: SpectrumAnalyzer.”

Could you give a solution

Thanks

Prince

By: Sumant

Sumant — Thu, 25 Oct 2007 12:26:15 +0000

Thanks,

this is a very nice and helpful article. I got a lot of informations.

But, I want to know how can I get the bass, midtone and high frequencies from the sound or the left/right channels of the soundchannel object.

I was trying to set the visible property true/false according to the music(actually according to the bass and other frequency values). I did, but I don’t think the way I am following is the proper way.

If there is any helpful article like the above then please help me.

Sumant

By: Morten Skogly

Morten Skogly — Mon, 10 Sep 2007 13:21:36 +0000

Is it possible to use computeSpectrum to analyze the track and display a waveform that shows the soundlevels etc for the entire file, and not just whats going on right then and there? I need something like that for a radio archive project.