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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  • jay V Sep 03, 2007

    I never mentioned an hdmi interface! because I don't have one. Just a coaxial out.



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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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Why is the lap top telling me i need a decoder to watch a movie

DVDs are one of the most popular types of media sold today. They hold feature length motion pictures, videos, audio and countless other types of media such as software and data. DVD's not only can be played in stand alone DVD players, but also most computers have a DVD drive. If a DVD includes media such as a feature length motion picture, this media has been encoded and sometimes compressed. In order for this type of DVD to be played on a computer's DVD drive, the data on the DVD must first be decoded; this is done with computer software which are know as Decoder. It should be noted that there are many types of DVD formats, hence several types of encoder programs to make a DVD accessible to computer users.

DVD's encode data in a variety of ways. For instance Dolby Digital data requires a Dolby Digital decoder. The same is true with DTS (Digital Theater System). These are both audio data that require decoding, but many video images stored on a DVD also require decoding including
MPEG (this is the most popular video format for DVD's). It should be noted that in order to play a standard DVD, the DVD player is not enough, you also need the software to decode the images making the data fully functional.

Hope this Explanation will help you,,,,,,



Dec 15, 2009 | Compaq Armada M700 Notebook

1 Answer

Connecting digital converter,Emerson VCR/DVD Combo,Sony SDTV

I think you may need an RF Modulator. This device will have connections for the DVD and TV and will have a channel 3/4 switch. Good luck to you.

May 15, 2009 | Emerson EWR20V4 DVD Recorder/VCR

1 Answer

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

SONY DVP-NS57P does not display video

If your TV has no input selector but has a video input, the TV probably "hides" the video input between the lowest channel on the tuner and the highest channel. That means if your tuner goes from channel 2 to channel 119, the video input will be between 119 and 2. The best way to see if this is the case is to slect channel 2 and then use the up/down channel selector to go down and see if you find the video input. Let me know if this works!

Nov 02, 2008 | Sony DVP-NS57P

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 Players & Recorders

1 Answer

Does not play multichannel audio (5.1) input through optical digital audio

Hi try this.

in the dvd player make sure you just leave it default (bitstream) but in the home theater receiver don't select 5.1 b/c that will only give you a virtual 5.1 not a true 5.1. In fact don't select any sound field at all just select dolby digital or dts depending on the source of the movie then you should be ok.

The only other problem i can see is that hdmi sends both the sound and picture to the tv. You will need to see if there's a function on the dvd player to only send the picture via hdmi and the sound via the optical out of the dvd player.

good luck


Jan 06, 2008 | Panasonic SC-HT920 System

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

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