help for Accoustic Modem

i am doing project on OFDM channel estimation,part of that is we have to transmit data from the soundcard(speaker) and on the reciever end i have to collect the data through mic. i am having very difficulty in the synchronization of transmitter and reciever,therefore i need help of yours in the form of ideas and matlab codes so that i can transmit from one computer and recieve data from other one using sound. Start a New Thread