Uploading Audio Files with ASIHTTPRequest

Question

Can anyone please give me a tutorial on how to upload Audio Files onto a server using ASIHTTPRequest? I'll need to build a JSON and get the audio data into the JSON then send it to the server. If this is too vague please don't hesitate to ask for more info.

let's say i use AVAudioRecorder class. What would i use to send that audio file to the server that is created after I record it and am ready to upload it?