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What does change sources audio to PCM mean - Audio Players & Recorders

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PCM or Pulse Code Modulation. It's basically the form of sound that digital sound is decoded into to be outputted to the speakers. In the case of Blu-Ray, it is high-bit rate uncompressed audio that should be significantly better than the standard compressed Dolby Digital track. So change audio output on your device to the HDMI output

Posted on Dec 03, 2014

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No sound when using an external source ie DVD player through an hdmi cable but the sound is fine when just using the TV


May be its not the fault of the TV. Check the hdmi audio setting of the DVD player. Change the player audio output format setting from bitsream to PCM. hope you will get the audio.
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Nov 07, 2015 | Televison & Video

1 Answer

I have a Sharp Aquos LC-60LE640X TV and I am trying to connect a Samsung HW-H751 Soundbar to it. I have hooked up the optical cable, adaptor and sub woofer, I have tested the Bluetooth function throug


If you are connecting the soundbar to your TV with the digital audio cable, make sure to select "D IN" using the source button on the soundbar. Bluetooth (BT) is a separate source from another device. (phone, etc.) The TV will need to be set to use the digital audio output and probably PCM format. (?) The subwoofer is preconfigured at the factory to mate up with your soundbar. (See below instructions - your soundbar includes the amplifier:)

Digital audio output setting:
After connecting an amplifier with digital audio input and
external speakers as shown, you should set an audio
output format compatible with the programme you are
watching or the device connected.
Go to "HOME" > "TV Menu" > "Setup" > "Option" >
"Terminal setting" > "Digital audio output" > select
"PCM" or "Bitstream".
NOTE
• When set to "Bitstream", Dolby Digital is output when the Dolby
Digital or Dolby Digital Plus audio formats are received. When
set to "PCM", PCM is output no matter what audio formats are
received.
• When set to "Bitstream", HE-AAC audio formats can be output
as Dolby Digital.

Jan 24, 2015 | Sharp Aquos Televison & Video

1 Answer

Why can I not change the setting from pcm to dolby digital on my tv


You don't. You change the signal at the source device end, not the TV.

If you have connected a Blu-ray player or a games console, then set the device audio option to Bitstream. This will send a data stream to the TV that it will decode either as Dolby or DTS depending on the source signal format.

Dolby Digital is only an option for an external AV source connected via HDMI. That's the only way to get a Bitstream signal in to the TV. The TV's internal tuner is only capable of PCM audio. It's a DVB-T tuner (standard definition) rather than the DVB-T2 tuner needed for HD. Even then, only the HD channels are encoded in DD.

Iff your BD player or console is decoding to stereo PCM, then it's doing the same job as the TV. There's a small advantage with one of the audio processing modes in how it limits the dynamic range, but other than that PCM and DD will sound identical. This is especially the case with any TV that has no optical audio out, as in this case. The TV can't pass a DD signal out to an external audio system. So all sound is played via the internal speakers or headphone jack. It'll all sound the same, PCM or DD.

Oct 13, 2014 | Samsung Televison & Video

2 Answers

RX-V465 Yamaha Reciver we can get picture but no sound w/PS3


Check HDMI Sound settings:
Enter Setup menu via remote, then Func. Setup / HDMI / Audio. You can choose from Amp (sound will be played via Yamaha), TV (sound will go straight via HDMI out to your TV and not play on Yamaha) and Amp+TV (Yamaha will play the sound and also pass it to the TV).
Also what is your source? DVD or some network player? For example Yamaha cannot decode audio in AAC or other computer formats, so be sure to change the audio settings of your player to output PCM and not raw/bitstream.

Mar 26, 2010 | Yamaha Rx-v465/rxv465 Home Theater...

1 Answer

The sound goes on and off


If this is only on ONE SOURCE doing this, it's trying to tell you the quality of the digital bitstream is marginal, meaning the connection is flaky.

The sequence of events is probably more like (cause) the digital signal degrades sufficiently to overcome correction; (effect) the PCM light drops out and sound is no longer decoded. Silence.

Consider the source, the media (as applicable) and its cable as suspects.

Feb 22, 2010 | Pioneer SX-315

1 Answer

No longer outputs audio from cable box. Code "PCM 2.0" on display after setting volume


PCM just means the type of audio it is. The 2 means stereo! Does the unit have a choice of audio outputs IE digital or linear?

Sep 06, 2009 | Audio Players & Recorders

1 Answer

Marantz sr5001 has pcm light flashing after child pushed buttons on front of receiver. no longer getting audio/video in tv mode but other modes are still working without issue. how can I get audio/video...


I suppose pcm light means that the pcm mode is turned on (pcm meaning pulse code modulation), in other words, the unit was switched to digital signal, so if the digital rca or optical TV input on your reciever is not connected to anything, then you're not getting any signal into the reciever in digital mode. You probably just need to switch the unit back to analog mode (see if there is a button that says something like digital/analog, pcm/analog, optical/coax or similar, try pressing it, see if there is any change).

I might just be totally wrong on this, however, probably the best way to learn what happened is to read the user manual if you do have it (see what the pcm light signals for and check any chapters inside the manual related to that topic).

good luck

3rq8 (Triarcuate)

Jul 25, 2009 | Marantz SR5500 Receiver

1 Answer

HK AVR35 Receiver - Dolby Digital not displaying or working


If the display is showing as optical/PCM, then the input signal is in 2 Ch Stereo.

Try to change the signal from the source i.e. the DVD player, On the remote, go to audio and press repatedly , the audio would change from audio1, audio 2 .... and so on, depending upon how may have been recorded on the DVD. If the DVD is recorded in Dolby Digital, it may show the audio as Dolby Digital 5.1 on you monitor. Once this setting has been done, your Receiver should automatically detect it and show as Optical/Dolby digital.

Please let me know if you you solve your problem.

Mar 12, 2009 | Harman Kardon AVR 35 Receiver

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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