in music files the frequenzy has to be 44100Khz
I'm pretty sure that the samping rate of 44.1 Khz ,or 44100hz, is just the maximum sampling rate supported by ofp for music/sound files...
you should be able to use as low of a sampling rate as whatever you program you're using to convert supports.
Generally the range of 44.1khz is consumer standard for digital audio applications, even though it still has poor sound quality compared to the professional gear out there... ( I often record at sampling rates upwards of 96Khz in professional applications)
44.1Khz was chosen to satisfy the Nyquist Theorem, which states that in order to digitally encode the desired frequency bandwidth , the selected sample rate must be at least twice as high as the highest frequency to be recorded.
Thus an audio signal with a bandwidth of 20Khz (very close to the accepted range of human hearing) would require a sampling rate of at least 40,000 samples per second (40Khz).
In addition if any signals that are greater than one half of the sample rate are allowed to enter the conversion process , then alias frequencies will occur which might be heard as audible harmonic distortion
So.. to make a long point.. uhh.. long...
you can use as low of a sampling rate as you want.. but the sound quality will decline greatly at anything lower than a sampling rate of 40 Khz
:cheers: