I have new LG 6300 TV with optical output for audio. I attached an optical cable to audio out and put that into a D_A converter. From the converter, i ran RCA cable to small amplifier that was connected to two SONY speakers I had. Everything works fine for viewing of programs via TWC but when we try to view program through Netflix, only loud static is heard. No audio. The TV allows only the internal speakers OR the external speakers. Suggestions?