 The generated tracks can be used as educational or practice tools, as accompaniment for live performances, or as a songwriting aid.Computers can use software to generate sounds, which are then passed through a digital-to-analog converter (DAC) to a power amplifier and loudspeaker system.The number of sounds that can be played simultaneously (the polyphony) is dependent on the power of the computer's CPU, as are the sample rate and bit depth of playback, which directly affect the quality of the sound.