That I don't know for sure. Never tried to use camcorder with such a device. You may wish to contact Customer Care at (800) 252-5722 or (800) 537-5722 if my guess below does not answer this question. My opinion from experience (utilizing firewire to PC functions) With fire wire to PC for instance...the PC has to have the proper hardware and software program (sold seperately) to recognize the camcorder. All the camcorder does is send the digital video info to the PC or device hooked up thru firewire. YOur Sony Walkman is the PC in this instance. If the Sony is not recognizing the signal from the camcorder...it is probably the Sony having the problem. If the Sony has the needed software to read the camcorder...then it should work. the camcorder just sends video images....the other device captures them. None of our camcorders come with hardware or software for video transfer they just come with the ability to do that function via fire wire connection.