  Wireless communications has become one of the fastest growing areas in our
modern life and creates enormous impact on nearly every feature of our daily
life. In this paper, the performance of M-ary modulations schemes (MPSK, MQAM,
MFSK) based wireless communication system on audio signal transmission over
Additive Gaussian Noise (AWGN) channel are analyzed in terms of bit error
probability as a function of SNR. Based on the results obtained in the present
study, MPSK and MQAM are showing better performance for lower modulation order
whereas these are inferior with higher M. The BER value is smaller in MFSK for
higher M, but it is worse due to the distortion in the reproduce signal at the
receiver end. The lossless reproduction of recorded voice signal can be
achieved at the receiver end with a lower modulation order.
