I have been digitizing my record collection over the years; my current setup has the turntable going into a preamp through RCA cables and then the preamp has RCA out into a mini converter that goes into a soundcard's line-in jack. In the past I have been able to route sound from the turntable through the computer and out the speakers, but that is not currently working. The sound goes in, I can record the record as it plays and then play the recording back, but I cannot hear it live.
What am I missing? I guess the soundcard converts the analog from the preamp into digital, do I need to somehow convert the digital back to analog to get it back out of the speakers in real time? Do I need another cable from that line-in jack going directly to the speakers?