What frequency is MP3?
A sample rate of 44.1 kHz is commonly used for music reproduction, because this is also used for CD audio, the main source used for creating MP3 files.
What does WAV stand for?
What is a WAV file? WAV or Waveform Audio File Format was developed jointly by Microsoft and IBM as an audio file standard for storing digital audio on PC. This format originated based on the Resource Interchange File Format (RIFF), a bitstream format that stores audio data in 'chunks'.