these are some of the articles i used during the making of amp:

H.C. Chiang and J.C. Liu, "Regressive Implementations for the Forward 
and Inverse MDCT in MPEG Audio Coding" IEEE Signal Processing Letters
Vol. 3, No. 4, April 1996

K. Konstantinides, "Fast Subband Filtering in MPEG Audio Coding", IEEE Signal
Processing Letters, Vol. 1, No. 2, February 1994

Th. Sporer, Kh. Brandenburg, B. Edler, "The Use of Multirate Filter Banks
for Coding of High Quality Digital Audio" 6th European Signal Processing
Conference (EUSIPCO), Amsterdam, June 1992, Vol. 1, pg. 211 - 214

B.G. Lee, "A New Algorithm to Compute the Discrete Cosine Transform", IEEE
transactions on Acoustics, Speech and Signal Processing, Vol. ASSP-32, No. 6,
December 1984
 
