Audio adjusting method and acoustic processing apparatus

An acoustic processing apparatus electrically connected with a microphone and a speaker, the acoustic processing apparatus comprising:

• an input unit, for receiving a feedback audio from the microphone;
• a storing unit, for storing a stored residue audio and an offset parameter;
• a computing unit, electrically connected with the input unit and the storing unit, for calculating a current residue audio according to the feedback audio, the stored residue audio and the offset parameter, and performing a correlation calculation to find out a relationship between the feedback audio and the stored residue audio;
• an adjusting unit, electrically connected with the computing unit, for selectively modifying the offset parameter according to a result of the correlation calculation;
• and
• an output unit, electrically connected with the computing unit, for outputting the current residue audio to the speaker.