[Flashcoders] How to compare two audio files with actionscript?

[johnny lee]

Hi All, how do you compare two audio files with actionscript? I heard
something about Fast Fourier Transform, but don't understand how it
works. What I'm trying to do is a basic voice recognition programme,
similar to the one on symbian mobile phones where you can give word
commands to your phone. Can this be done in actionscript?

Thanks and cheers, juju
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Re: [Flashcoders] How to compare two audio files with actionscript?

[johnny lee]

Thanks Latcho, can you please describe the process a little bit. What
actually is going on? How is the FFT used to compare the wav files? Is it
comparing header data or something? And what about MP3 files, can they be
used instead of wav? Thanks, juju

P.S. Has to be AS3, trying to make a Flash RIA.

On Thu, Aug 6, 2009 at 3:42 AM, Latcho  wrote:

>
> I'd suggest you first get down in audio math and algorithms and indeed FFT.
> If you're done with that... choose whatever language you like and
> preferably a faster one then AS3.
> But it is not impossible to answer your question.
>
>
> johnny lee wrote:
>
>> Hi All, how do you compare two audio files with actionscript? I heard
>> something about Fast Fourier Transform, but don't understand how it
>> works. What I'm trying to do is a basic voice recognition programme,
>> similar to the one on symbian mobile phones where you can give word
>> commands to your phone. Can this be done in actionscript?
>>
>> Thanks and cheers, juju
>> ___
>> Flashcoders mailing list
>> Flashcoders@chattyfig.figleaf.com
>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>>
>>
>>
>
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Re: [Flashcoders] How to compare two audio files with ActionScript?

[johnny lee]

Thanks Kerry, I'm still not understanding the process. What actually needs
to take place in order to compare two audio files? How does FFT come into
this? Thanks, juju

On Mon, Aug 10, 2009 at 5:39 AM, Kerry Thompson wrote:

> Latcho wrote:
>
> > I'd suggest you first get down in audio math and algorithms and indeed
> FFT.
> > If you're done with that... choose whatever language you like and
> > preferably a faster one then AS3.
>
> AS3 may be fast enough. Its math classes are compiled to native code, and
> the loops will likely be compiled by the JIT compiler. Take a look at
>  to see what can be done with music in real
> time,
> using AS3. I do believe the sounds are generated in real time using FFT.
>
> Cordially,
>
> Kerry Thompson
>
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Re: [Flashcoders] How to compare two audio files with actionscript?

[johnny lee]

Where are the Actionscript Sages when you need them :(

On Mon, Aug 10, 2009 at 10:25 AM, johnny lee  wrote:

> Thanks Latcho, can you please describe the process a little bit. What
> actually is going on? How is the FFT used to compare the wav files? Is it
> comparing header data or something? And what about MP3 files, can they be
> used instead of wav? Thanks, juju
>
> P.S. Has to be AS3, trying to make a Flash RIA.
>
>
> On Thu, Aug 6, 2009 at 3:42 AM, Latcho  wrote:
>
>>
>> I'd suggest you first get down in audio math and algorithms and indeed
>> FFT.
>> If you're done with that... choose whatever language you like and
>> preferably a faster one then AS3.
>> But it is not impossible to answer your question.
>>
>>
>> johnny lee wrote:
>>
>>> Hi All, how do you compare two audio files with actionscript? I heard
>>> something about Fast Fourier Transform, but don't understand how it
>>> works. What I'm trying to do is a basic voice recognition programme,
>>> similar to the one on symbian mobile phones where you can give word
>>> commands to your phone. Can this be done in actionscript?
>>>
>>> Thanks and cheers, juju
>>> ___
>>> Flashcoders mailing list
>>> Flashcoders@chattyfig.figleaf.com
>>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>>>
>>>
>>>
>>
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Re: [Flashcoders] How to compare two audio files with actionscript?

[johnny lee]

Hi Allandt, Thanks for the article link. I read through and pls correct me
if I'm wrong: You can take a snapshot of an audio file with the
computeSpectrum() method and place that data in a ByteArray object, is this
right? So, now my question is, can you take snapshots of two audio files and
compare their ByteArray objects, and then perform an action based on the
comparison? Like, the ByteArray objects match up 90% then trigger this
event.

Muchos gracias, juju

On Mon, Aug 10, 2009 at 6:24 PM, Allandt Bik-Elliott (Receptacle) <
alla...@receptacledesign.com> wrote:

> have you seen anything like this?
>
> http://www.communitymx.com/content/article.cfm?cid=8E9A0
>
> just trying to get a feel for what you are trying to do
>
> a
>
>
>
> On 10 Aug 2009, at 09:35, johnny lee wrote:
>
>  Where are the Actionscript Sages when you need them :(
>>
>> On Mon, Aug 10, 2009 at 10:25 AM, johnny lee  wrote:
>>
>>  Thanks Latcho, can you please describe the process a little bit. What
>>> actually is going on? How is the FFT used to compare the wav files? Is it
>>> comparing header data or something? And what about MP3 files, can they be
>>> used instead of wav? Thanks, juju
>>>
>>> P.S. Has to be AS3, trying to make a Flash RIA.
>>>
>>>
>>> On Thu, Aug 6, 2009 at 3:42 AM, Latcho  wrote:
>>>
>>>
>>>> I'd suggest you first get down in audio math and algorithms and indeed
>>>> FFT.
>>>> If you're done with that... choose whatever language you like and
>>>> preferably a faster one then AS3.
>>>> But it is not impossible to answer your question.
>>>>
>>>>
>>>> johnny lee wrote:
>>>>
>>>>  Hi All, how do you compare two audio files with actionscript? I heard
>>>>> something about Fast Fourier Transform, but don't understand how it
>>>>> works. What I'm trying to do is a basic voice recognition programme,
>>>>> similar to the one on symbian mobile phones where you can give word
>>>>> commands to your phone. Can this be done in actionscript?
>>>>>
>>>>> Thanks and cheers, juju
>>>>> ___
>>>>> Flashcoders mailing list
>>>>> Flashcoders@chattyfig.figleaf.com
>>>>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>>>>>
>>>>>
>>>>>
>>>>>
>>>> ___
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>>>>
>>>
>>>  ___
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>>
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Re: [Flashcoders] How to compare two audio files with actionscript?

[johnny lee]

Thanks All, this looks harder than I first thought it would be. Guess
there's no straighfoward solution.

On Mon, Aug 10, 2009 at 11:04 PM, Glen Pike wrote:

> Hi,
>
>   computeSpectrum will only do small chunks at a time - it might not give
> you the "spectrum" from the whole wave form.
>
>   If you are trying to do Voice Recognition, you will need some serious
> computing power and ActionScript may, or may not be too slow to handle this.
>  It certainly won't work in realtime so don't expect miracles with the AVM.
>
>   Speech recognition may use FFT's to help match up parts of the sound to
> pre-recorded samples, but that's as far as my knowledge goes.
>
>   Your best bet is to look at places like http://www.voxforge.org/ and
> google for speech recognition, etc.
>
>   Depending on your RIA, you could always find a way of cheating
> possibly...  ...e.g. find a speech-to-text engine and write a small
> application that "pipes"  the output into Flash, etc.
>
>   Glen
>
>
>
>  johnny lee wrote:
>
>> Hi Allandt, Thanks for the article link. I read through and pls correct me
>> if I'm wrong: You can take a snapshot of an audio file with the
>> computeSpectrum() method and place that data in a ByteArray object, is
>> this
>> right? So, now my question is, can you take snapshots of two audio files
>> and
>> compare their ByteArray objects, and then perform an action based on the
>> comparison? Like, the ByteArray objects match up 90% then trigger this
>> event.
>>
>> Muchos gracias, juju
>>
>> On Mon, Aug 10, 2009 at 6:24 PM, Allandt Bik-Elliott (Receptacle) <
>> alla...@receptacledesign.com> wrote:
>>
>>
>>
>>> have you seen anything like this?
>>>
>>> http://www.communitymx.com/content/article.cfm?cid=8E9A0
>>>
>>> just trying to get a feel for what you are trying to do
>>>
>>> a
>>>
>>>
>>>
>>> On 10 Aug 2009, at 09:35, johnny lee wrote:
>>>
>>>  Where are the Actionscript Sages when you need them :(
>>>
>>>
>>>> On Mon, Aug 10, 2009 at 10:25 AM, johnny lee  wrote:
>>>>
>>>>  Thanks Latcho, can you please describe the process a little bit. What
>>>>
>>>>
>>>>> actually is going on? How is the FFT used to compare the wav files? Is
>>>>> it
>>>>> comparing header data or something? And what about MP3 files, can they
>>>>> be
>>>>> used instead of wav? Thanks, juju
>>>>>
>>>>> P.S. Has to be AS3, trying to make a Flash RIA.
>>>>>
>>>>>
>>>>> On Thu, Aug 6, 2009 at 3:42 AM, Latcho  wrote:
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> I'd suggest you first get down in audio math and algorithms and indeed
>>>>>> FFT.
>>>>>> If you're done with that... choose whatever language you like and
>>>>>> preferably a faster one then AS3.
>>>>>> But it is not impossible to answer your question.
>>>>>>
>>>>>>
>>>>>> johnny lee wrote:
>>>>>>
>>>>>>  Hi All, how do you compare two audio files with actionscript? I heard
>>>>>>
>>>>>>
>>>>>>> something about Fast Fourier Transform, but don't understand how it
>>>>>>> works. What I'm trying to do is a basic voice recognition programme,
>>>>>>> similar to the one on symbian mobile phones where you can give word
>>>>>>> commands to your phone. Can this be done in actionscript?
>>>>>>>
>>>>>>> Thanks and cheers, juju
>>>>>>> ___
>>>>>>> Flashcoders mailing list
>>>>>>> Flashcoders@chattyfig.figleaf.com
>>>>>>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>  ___
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>>>>>
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>>>>
>>>>
>>>>
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>>
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[Flashcoders] Actionscript class for creating a Spectrogram?

[johnny lee]

Hi Flashcoders, is anyone aware of an available actionscript class that uses
a Fast Fourier Transform (FFT) to create a Spectrogram in Flash? I'm trying
to record a person's voice and ask the actionscript class to convert the
audio into a spectrogram that can be displayed and compared in flash.

Thanks, juju
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