Question about Onkyo TX-DS575 Receiver

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PCM vs Dolby Digital

I just updated my system and am now a bit confused. The old hook up would display a red bordered "Dolby Digital" box when playing DVD or recieving the proper signal via the cable box. The new set up has a LCD 46" 630 Samsung series TV. I have an HDMI cable from the cable box to the TV, an HDMI cable from the BluRay to the TV and an optical cable from the TV to the TX DS575 reciever. I no longer get the red box, I now get "PCM Digital" and Dolby Pro Logic" displayed together only. Is this typical, good, bad? I have not been able to find any info on this.

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  • brooks11b Dec 10, 2008

    Same problem here, just hooked up a blue ray with fiber optic.

  • mvera Dec 24, 2008

    Same Problem and bitstream didn't help

  • Bone_Daddy Dec 25, 2008

    Same problem here. I believe the microprocessor is out and needs to be replaced.

  • Anonymous Jan 23, 2009

    I've got the same problem.... my Magnavox BD has a coax into my receiver and now only displays the PCM Digital along with the Pro Logic.

  • Anonymous Mar 22, 2014

    Problems hooking my RCA RTD3131 E Dolby digital to my Samsung Led series 6

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OK, I just figured this out. Go to the audio options in your DVD player and switch from pcm to bitstream. Now my movies sound right again.

Posted on Dec 10, 2008

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Posted on Jan 02, 2017

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Yamaha RX-V595 Receiver will play Dolby Digital 3/2.1 audio Blu-Ray disc with player set to bitstream but will not play DTS-HD 3/2.1 unless output is set to PCM. Is this an issue with the Yamaha Recei


The optical connection (SPDIF) doesn't have enough bandwidth to transfer DTS-HD audio. To use DTS-HD, you must connect the blue-ray player and receiver via HDMI cable.

Each DTS-HD audio track on blue-ray includes also "normal" DTS audio, which is probably used when you select PCM. Player decodes it and sends decoded (non-HD) audio via optical cable to receiver.

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I have a Sharp Aquos with a optical output, i conected it to the tv optical input of the panasonic sc ptx7 but it doesnt have audio via optical,on the contrary via rca works perfectly.


hi,
check the following on ur tv


1. Press MENU to display the MENU screen,
and then press c/d to select "Digital
Setup".
2. Press a/b to select "Audio Setup", and then
press ENTER.
3. Press a/b to select "PCM" or "Dolby
Digital", and then press ENTER.
4. Press MENU to exit.

PCM The optical output terminal output studio signal in PCM form. If your digital audio system does not support Dolby Digital, select "PCM".

Dolby Digital
The optical output terminal outputs audio signal in Dolby Digital form. it reproduces sound from surround program of digital.

also check the input assignment of ur dvd palyer's tv input. if it is selected as analog then change it to digital.
ok

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Panasonic SC-PT660 digital in doesn't work


Select to suit the type of audio from the OPTICAL IN terminal on the main unit.
1 While in “D-IN” mode
Press and hold [—SETUP] to select “MAIN/SAP”, “DRC” or
“PCM FIX”.
2 While the selected mode is displayed
Press [up, down] to make the setting.
MAIN/SAP mode (Only works with Dolby Dual Mono)
MAIN, SAP§, MAIN+SAP§ (stereo audio)
§ “SAP” = Secondary Audio Program
Dynamic Range Compression
DRC ON: Adjust for clarity even when the volume is low by compressing
the range of the lowest sound level and the highest sound level.
Convenient for late night viewing. (Only works with Dolby
Digital)
DRC OFF
PCM FIX mode
PCM ON: Select when receiving only PCM signals.
PCM OFF: Select when receiving Dolby Digital and PCM signals.
[Note]
Audio that is input through the OPTICAL IN terminal cannot be output
through the HDMI terminal.

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Display while playing movies


Hi, no, this is not the normal display. It should indicate the digital sound format like DD or DTS, etc. If it is displaying PCM, this is probably due to the audio settings on your DVD player. Please provide your DVD make and model, and I will look to find the solution.

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Have you tried setting the PS3 on linear PCM output instead of bitstream? The DVR 50 may not say Dolby Digital since the optical cable goes directly from the PS3 to it but you may get the surround channel output you're looking for.

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Onkyo HT R510 is broadcasting all digital and 5.1 from the cable box as pcm


Chances are that Time Warner is just plain wrong. That's what you get with free tech supp....oh, uh right. scratch that.

Your receiver seems to be receiving a 2-channel digital audio signal (PCM) from the cable HD box. With this type of input signal, you can't select Dolby Digital on the receiver.

If you have a Scientific Atlanta 8300 (or a closely similar model):
Press [Settings] button on the remote twice. This will open the General Settings menu. Go to "Audio: Digital Out" and the select Dolby Digital (by hitting [-> Move Right]).

If you have another type of cable box, just review the settings menus until you find something relevant to digital audio out and avoid PCM, stereo or "down conversion", but look for Dolby Digital, DTS or "All".

Please keep in mind, that when connecting devices via HDMI cables, your box may decide it's smarter than you and reset the format of the digital audio back to PCM. This is some possibility of this occurring if the cable box or TV is unplugged and plugged back in.

If you have problems, add the cable box make and model and let me know.

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I had the same problem with my 321 system. The fix is in the cable box settings. You want to change the Digital Out on the cable box..my choices were HDMI....Dolby Digital..and None. Choose Dolby Digital and it will show up on your Bose 321 display. I also have my cable box connected to my bose system via optical digital cable...and a digital coaxel cable from my dvr to my bose. Change that output setting on my cable box took care of the PCM 2.0 problem for me.

Dec 19, 2007 | Audio Players & Recorders

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