audio codec, includes LPC,The code was tested on male and female speech files recorded using a microphone on my pc and also tested on the wavefiles of the TIMIT database. The results are found to be good enough. I have attatched 5 sample wavefiles, on which I have tested my code.

LPC_fin
.......\func_lev_durb.m
.......\func_pitch.m
.......\func_vd_msf.m
.......\func_vd_zc.m
.......\f_DECODER.m
.......\f_ENCODER.m
.......\f_GAIN.m
.......\f_SYN_UV.m
.......\f_SYN_V.m
.......\f_VOICED.m
.......\kdt_003.wav
.......\kdt_070.wav
.......\kdt_215.wav
.......\MAIN.m
.......\PG_vs_M_graph_for_lev_durb.m
.......\READ ME.txt
.......\s1ofwb.wav
.......\s2ofwb.wav

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