provided to a decoder 108 where the output file is restored to its original signal i e the input signal fig1 shows a prior art system 100 for audio speedup the input audio signal is pre processed at one or more speed up rates by a plurality of processors such 112 114 116 the resulting pre processed signals are encoded by a plurality of encoders i e 118 120 122 and stored in a storage device 124 at playback time the client requests one of the stored speedup signals and that stream is delivered to the client over the network this method does not require real time audio speedup computation on either the server 39 s side or the client 39 s side it only requires a standard streaming bit rate however the method satisfies only a fixed set of precomputed speed up rates and it requires that the server store multiple versions of the same stream at multiple rates thus increasing the storage requirements and costs fig1 shows another prior art system 125 the audio signal is stored at its original speed the speed up rate is 1 0 at playback time the user requests a different speed up ratio the audio signal is then streamed at a faster bit rate over the network to the client the client processes the audio signal applies an audio speed up algorithm computes the speedup version and plays the audio signal this method does not require additional storage and supports almost any speed up ratio however it requires streaming at a faster bit rate thus overloading the network and the streaming server which.