getting audio frequency from amr file

I am new in j2me developing world. I just want to know that how to get audio frequency from the audio recording application which stores data in .amr file. Please help me, I tried a lot, but I am helpless. So any idea 开发者_如何转开发regarding this will be appreciated. thanks in advance.

im gonna ad here what i have found from the other sites that may be useful to you and me(as a newbie)

1. http://www.developer.nokia.com/Community/Discussion/showthread.php?154169-Getting-Recorded-Audio-Frequency-in-J2ME

If you want frequency of sound in Hz then it is actually not a single value but a series of values as a function of time. You will have to calculate fourier transform of the sound samples which will give you frequency.

Read about this on wikipedia on how to calculate fourier transform and frequency graph...

1. http://www.developer.nokia.com/Community/Discussion/showthread.php?95262-Frequency-Analysis-in-J2ME-MMAPI

this forum says something about fft(fast fourrier transform) and analysing recorded amr sound rather than processing live stream and provides 3 link about fft which are right underneat this line have a look at them:..

look at the site mobile-tuner.com. (im new too. in fact i know nothing about java.) but the site says that tuner function enabled phones are s60 phones. i was trying to write guitar tuner program. since my phone is nokia 5310 express music which is s40 i gave up.

so good luck to you

note: javax.microedition.media.control.RecordControl

--i don't know too much but i have a hunch about that ""Record Control"" class or function is related to audio frequency function in j2me. and the frequency analysis thing is inside the "sound processing"