Originally Posted by farshad
I bought the mdrds 7500
when I connect it directly to pioneer BD with optical cable all is ok,great sound
but when connect through HDMI to my pioneer amp VSX-LX53 I get no sound from headphone
can you please help me out
As you first mention, running HDMI out from a BD player, to the MDR-7500, you will get ALL the audio codecs offered on the disk itself, and that's the best way to go (and you will see the various audio codec lights on the Sony unit, depending on your audio source input). In this scenario, bypassing the AVR, it does not even have to be powered on, and you will get the highest quality audio the source offers, to the headphones.
I don't own a "pioneer amp", so I know nothing about it's connections, options, or settings.
BUT, for the sources I use, like BR decks, and an ATV-3, these are connected via HDMI to my AVR, a now older, Onkyo 906, with 4 HDMI inputs, and two HDMI outputs (sub/main). When for example I want to see/hear the ATV, I have to switch to a setting on my Onkyo located in the Onkyo AVR settings: HARDWARE-HDMI-AUDIO TV OUT, in most cases when NOT using the wireless headphone, this setting is: "OFF", for my AVR to pass audio via HDMI, to the Sony MDR-7500, I must change this setting to: "ON". There is a LIMITATION for the audio in this configuration.......... see note......
NOTE: The audio now being passed via the AVR to the Sony MDR-7500, is only DOLBY, I will ONLY get and SEE, the "Dolby" light go on on the Sony wireless base station, it will play Dolby 5.1, which is all the AppleTV can do anyways . Any Blue Ray deck sources wired this way through the AVR, will only pass the Dolby tracks on the Blue Ray disks, assuming they have one as a fall back from "DTS HD Master Audio", most Blue Ray movies have a regular Dolby audio track, but I've begin to notice on some new BR disks, that there is NO regular Dolby audio track, just the "DTS HD Master Audio", that can be a problem. I also do NOT get any 7.1 BR audio, either. This is a limitation, at least for my 2009 Onkyo 906 AVR, passing audio over HDMI, not sure about newer AVR's.
So, all I can advise is you look closely at your Pioneer manual, you say it's an "amp", not sure if you have an AVR (audio/video receiver), or just an amp, but check for any settings that relate to "audio" over HDMI. The Sony MDR-7500 is really designed to take input sources (BlueRay etc.) directly into the base station, in this manner it works the best, though other, somewhat more limited configurations can work, you have to experiment with your own system, and the way it's wired. For listening and watching BR movies from my Oppo 83, I use a "passive" A/B switch, in the "A" position, the HDMI cable is feed directly to my AVR, and I listen via my external speakers. Late at night, I put the switch in the "B" position, and feed via HDMI, the Sony MDR-7500, and listen to the audio wirelessly, the Sony feeds my Panasonic VT-50 plasma monitor, and I can turn OFF the AVR completely since I'm bypassing it, both audio and video, completely. Good luck!