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Discussion Starter · #1 ·
I have a new LG 55LE5400; many of the features of this HD LED tv are great, but a audio output to feed a hearing aid loop is critical to me. I was prepared for not having an analog audio output by having a optical to analog converter box; now i find this box only works with some programming. it is ok if the TV input is analog but if i am receiving a DT input OTA there is no audio from the converter. The LG customer service tells me I must have an LG audio system to guarantee that the digital optical output will work. anyone know what might be going or have a recomendation for getting analog audio from this set? I would use the headphone jacks but when you plug in a headphone the speakers are disabled.
 

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Discussion Starter · #3 ·
LG digital optical not working always working

thanks for the help.

no documented pcm support except on the HDMI input. so no help on output.

I am using the term hearing aid loop to describe what is sometimes called an induction loop. this is a loop of wire (in my basement) that is powered by a somewhat beefy mono audio amplifier. This is the amplifier i need the analog audio feed for. this loop creates a magnetic field that couples to the "T coil" in my wife's hearing aids. Many hearing aids have T settings, these were originally used when using the telephone, but now magnetic induction loops have become somewhat standard, if not common, in theaters and auditoriums to aid the hearing impared. I have installed a loop for our living room so that my wife can get a wired like quality connection to the TV. it had worked great.

I am using the LG TVs ATSC/NTSC built in tuner. actually the external feeds, like DVD, dish and VCR come thru the tv set and work fine, as do the analog off the air (from canada), only the DT off the air is dead, i suspect it is as you indicated related to the encoding they enable. My converter is a no model # branded "Monoprice" box I bought on ebay. I hadn't seen any with detailed specs about what encoding they converted; this one lists several sampling frequencies, but no details of its encoding capability. So i am guessing it is just PCM? Are there converters with better decoding capability?

A home theater system might work, but I still wouldn't have(monoral) analog audio to feed the loop amp. I can sum L-R signals, i suppose something similar could be done with DD5.1.

i am not real interested in having another big box and remote stuffed below the TV if i can avoid it. i have considered taping into the internal speakers, but this could have problems if they aren't referenced to ground and I don't want to void the warrenty just yet.

The audio output from TVs often is not controlled by the volume control and this is best, but few new large HD tvs have analog out.
 

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Discussion Starter · #5 ·
lg digital optical

yep, that is what i did to the manual also. the pcm delt mostly with inputs. I have searched the UI controls nothing. I will ask LG customer support to suggest something. but generally it has been hard to get thru to someone who knows something more than the script they have in front of them. i suppose i could put microphones right in front of the speakers, will take some amplifier construction and is un-elegant.
 
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