I would use the HDMI audio straight to TV and forget the HTIB and see if that solves your delay problem. For the life of me I can't figure out why HTIB manufactures built these without a digital input (a lot of them did). If it has a digital 5.1 processor that can only be used for the internal DVD its useless for your cable box or Sat box they all have digital out and 5.1 audio. Even all TV's have digital out or thier tuners. Anlog RCA has been gone for 10 years or more They still make these without n HDMI input for your cablebox and they have lossless processors in them???
"Smart enough to know better, to old to care" ------ Dedicated Home Theater, Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 10TB DroboFS NAS