Transmitter not receiving audio from computer

[neighbors75]

Hello,

I just bought a sain sonic AX-05B Low Power fm Transmitter, I put it all together like is explained antenna first, power supply. then checked for transmission to my fm radio on the empty channel I selected air silence. Here is the problem, When I remove my speaker 3.5 plug in my computer audio and put the audio feed to the transmitter I get nothing from the computer. I checked my fm radio before the audio, all was silence at the frequency i choose, plugged audio in the audio port and nothing transmitted to the fm radio, yet I can plug my speakers back in and get sound. The cord I used to the transmitter is new. I use windows 7 and Sam Broadcaster software as I have an internet Radio station on the air. so I am a Loss as to what to do.

[The Poet]

I would try using the computer headphone jack for audio to the transmitter.

If there's no volume or modulation variable control on the transmitter, then I'm not sure what else the problem would be.

[neighbors75]

I am going to use an mp3 player to broadcast with, it works but it does have limits. It is possible I may need to install a better sound card. Thanks Poet..!