Reducing transmission time and storage space required to store the corresponding piece of data or information, are the main two ooals of the compression. Process these two goals became very important to be achieved especially after the .great growth of the stored and transmitted data using different media types and also over the Internet. Two general types of compression methods are there, that is continuously being developed, these are lossless and lossy compression methods. This work is an attempt to develop lossy audio compression software based on the Transform Coding (TC) method. A new weighting mechanism was used in the bit allocation step during the compression phase, which determines how many bits required for representing each coefficient. Adopting this weighting mechanism gives an encouraging PSNR results ranges from 28dB to 49dB. The time required to compress an audio file is affected by the size of each block being extracted from the processed audio file, this means larger block size implies longer time required to compress the corresponding audio file. The developed software was tested using four wave samples of data, and give encouraging results.