A method and system for pulse code modulation (PCM) audio ramp and decay function may comprise receiving at least one control signal which indicates whether to enable a ramp-up function or a decay function. When the ramp-up function is enabled, an audio input signal may be modified such that an input low to high transition may make a more gradual transition from low to high at the output, and when the decay function is enabled the audio input signal may be modified such that an input high to low transition may make a more gradual transition from high to low at the output. These functionalities may reduce unwanted noise generated when there is a sudden high to low transition, or a sudden low to high transition, in audio signals.

 
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