Freesound Forums

Hello I have found some so called looped Sounds on this webpage. And I am very interested in this aspect of audio manipulation, I have been using matlab to diagnose the syndrome of my own unloopable Audio, Mostly recorded instruments. And Cannot understand how I can create a seemless wav file. Although I am familiar with the means of modulating audio samples, I am unfimiliar with the math involved in creating a seam between beginning and end of audio. Can anyone shed some light?

IE: When I am using matlab I am using the fft command which I now believe does not give me a practical histographic translation of sampled frequencys. Rather a double set of parameters one xaxis representing the frequency in question and yaxis the resultant amount of that frequency present. If someone was willing to chat about the aiff format or mspcm features I believe we could put a stamp on this question. Thanks!

Yeah, an fft would show you how often which frequencies are present, this wouldn't help you when you try to loop an audio file though. Just like a histogram can't help you make tiling images.
You can makes seamless sound loops by having some parts crossfading into eachother. If the sound in question has any effects, like vibrato or tremolo, these must be aligned perfectly. It's a bit hard to explain (especially at 1am ), it takes a bit of playing with some files, and thinking logically, but this should get you a bit further, hopefully.