Recording:

    Sound wave coming from the microphone in the analog form will be sent to the ADC to be converted into digital signal comprising of 0s and 1s only. These signals will be sent to the DSP to be processed. While processing, instruction is fed in from the ROM, typically EPROM which tells the processor how to handle the digital information. Typically, the DSP compresses the sound data and sends it to the CPU, the CPU will carry out operations that will save the data in a *.wav format which is huge. A minute of sound will take up 10 megabytes of storage.

    During playback, the wav file is read into memory and sent to the DSP, the DSP decompresses the data and then send it to the DAC which will convert the binary information into analog wave form. Then this information is amplified into larger electrical currents and sent to the speaker.