Question about B&K AVR-507 Receiver

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Does not decode Dolby Digital 5.1 from my cable box

The 507 works properly with DVD player but when I try to watch an HBO Movie or 5.1 broadcast I can only get Pro Logic. I've tried with different cable boxes as well as optical/coaxial. However, I am listening through the same signal path!I have no analog path wired. In other words I am listening through the Coaxial signal path to get my audio when I switch my cable box to output Dolby Digital I get no audio. When I switch back to "other" it works. "Other" is digital PCM linear stereo 2.0

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Re: Does not decode Dolby Digital 5.1 from my cable box

If you have an HDMI cable plugged into the cable box it may only output 2.0 on the digital audio output. Set the HDMI audio to off or 2.0 and then set the cable digital out to Dolby.

Posted on Sep 03, 2007

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Got a Kenwood vr405 surround receiver, a Sanyo plasma TV, hd cable box and an insignia blu ray player. Both the cable box and the blu ray player are connected via hdmi to the TV and the TV is connected to...

If you would like to use high definition audio decoding, connect the HDMI from the blu ray player to the receiver. If that it not an option for you due to lack of equipment such as an additional HDMI cable to go from the receiver to the television for the video portion of the signal, then connect your optical cable again. After the optical cable is connected, make sure the Dolby Digital decoding is enabled on the receiver, and that the media you are playing also has a version of 5.1 surround sound. Then, enter the setup menu of the player (which I suspect this is actually where the problem might reside in your case) and make sure that Dolby Digital and DTS are not set to "downmix." Dolby Digital should be set to output Dolby Digital and so on and so forth...hope this helped.

Jan 14, 2010 | Kenwood VR-405 Receiver

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Dolby output is Pro Logic II, even though source is Dolby Digital

I know nothing about tivo but dvd player might need to be on bitstream to pick it up.I have to change mine when listening to music. hope this might help.

Mar 26, 2009 | Onkyo TX-SR304 Receiver

1 Answer

Wil not switch to dolby digital mode

You must use optical sound wire in order to reprduce dolby digital......You should have 2inputs on the back for the signal must be broadcasted in dolby digital.Such as HBO,SHOWTIME....they will tell you before the show comes on whether or not the movie or event is being broadcasted in dolby digital.Your unit will automatically change to dolbly digital once the show or event starts.Just make sure your input on video1,2,or3 is set to optical1 or 2.Just press the "Audio Sel" on the remote to change the audio source.But make sure the optical wire is connected first.....And just incase,make sure you are sending a dolby digital source to the unit from the sat reciever,cable box,playstation2.....make sure the dolby digital/optical option is on.You can find out what audio options you have in the menu screen.........or the redneck way.look on the back of the sat reciever/cablebox/playstaion2 ect...for a red laser light comming from these units.........i hope tht helps.

Feb 20, 2009 | Onkyo HTR500 Receiver

1 Answer

No Dolby Digital through DVD player

Have you configured the digital output settings on the DVD player? You may need to set the digital output format in the DVD player setup menu. If it is set for LPCM then you won't get sound. It has to be set for bitstream and yoou may need to tell the player what output to use.

As you didn't mention the brand of DVD player, I can't really give you any detailed instructions.

Also try using the optical cable that you have connected to the cable box to test it and see if you get any output on that connector. If yyou do then it is a setting in the amp that is not configured properly,

Best of luck


Jan 20, 2009 | Yamaha HTR-6130 Receiver

1 Answer

PCM vs Dolby Digital

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.

Nov 16, 2008 | Onkyo TX-DS575 Receiver

1 Answer

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.

May 13, 2008 | Onkyo HT510 Receiver

1 Answer

I have a panasonic SC-PT850 DVD home cinema system, and although it says it is DTS and Dolby 5.1 compatable but it does not give out any sound at all when i play Blueray films or Playstation 3 games which...

Not so much an answer more a shared problem with a slight insight. On the Panasonic manual page 40
It states the following: This unit can decode the surround signals received through cable TV box, digital broadcasting or satellite broadcasts. Refer to your equipment’s operating instructions for details. Only Dolby Digital and PCM can be played with this connection.
So it sounds like the SA-PT850 unit will decode DTS from an internal source ie DVD but not from an external source ie ps3 or WDTV which is a shame because I own a WDTV. The solution for me is to convert the dts to ac3 (Dolby digital) which works great. But not sure if this is an option for you.

May 08, 2008 | Panasonic Audio & Video Receivers

6 Answers

Source always PCM, can't get Dolby-D

PCM is standard when using HDMI cables, you are passing an already decoded audio signal to the receiver and it outputs the sound and does nothing more. The reciever calls this PCM, your PS3, when pressing select should show that it is decoding the dolby digital HD. There is no quality difference in the two. PCM is the same because it is un compressed audio. So when using HDMI, no matter the signal that the movie or music is playing, wether it be dolby or DTS, you will see PCM when using HDMI.

Nov 24, 2007 | Onkyo TX-SR605 Receiver

1 Answer

Dolby DIgital 5.1 doesn't work with DVD', only DTS works.

Have you changed your DVD player or it's settings? If the Dolby Digital light comes on then your receiver is working as it is detecting the signal format. I suggest that you check the set up of the DVD player and make sure that it is set for bitstream and not pcm.

Jun 26, 2007 | Onkyo TX-DS575 Receiver

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