PS3 audio problem with uncompressed PCM. - High-Def Digest Forums
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Old 10-26-2007, 11:47 PM
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Default PS3 audio problem with uncompressed PCM.

If anyone remembers, I had trouble not getting Dolby Digital to show up on my Onkyo SR705 receiver when playing games or movies on the 360. Now I'm trying to watch BluRay movies on my PS3 and I'm getting yet another headache from all of this!

Here's the deal...

PS3 set to PCM output. Onkyo SR705 is picking up "PCM MULTICH HDMI". Now, no matter what movie I put in that has PCM uncompressed audio, the rear two channels of my 7.1 setup do not put out any sound. If I throw on other receiver listening modes such as THX Select2, I hear the rears. Yet choosing "Multich" listening mode, which I thought is what is supposed to be set to get true uncompressed audio, only my center, fronts, and sides output audio.

So guys, what gives? Am I just ignorant and missing something?
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Old 10-27-2007, 12:02 AM
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This is not a PS3 problem. Not many movies use 7.1 audio. There is more than likely a setting on your receiver to activate the rear channels when there is no 7.1 audio signal.
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Old 10-27-2007, 12:05 AM
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Well, if it's 5.1 uncompressed PCM, wouldn't the center, front, and rears work, not the sides?
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Old 10-27-2007, 12:09 AM
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Quote:
Originally Posted by Romeo View Post
Well, if it's 5.1 uncompressed PCM, wouldn't the center, front, and rears work, not the sides?
When you do 5.1 you can set the surrounds to the sides or the rears. When you do 7.1 the rears become the last two channels, usually called the surround back channels. Look in your manual to see if there is a way to activate them regardless of the number of channles on the input signal.
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Old 10-27-2007, 12:18 AM
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I thought the 705 could matrix the rear surrounds for PCM. I know that trhe 605 doesnt have this feature so the rears are silent unless you feed it with a source having 7.1pcm.If you can get your paws on ultimate avengers its the only title i know that has 7.1 pcm try this and see if your rears work.
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Old 10-27-2007, 12:20 AM
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try using bitstream on the ps3 menu and try going into audio menu and check off all the formats of pcm like pcm 5.1, pcm 7.1 etc
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Old 10-27-2007, 12:25 AM
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I checked all of my settings and don't see such an option Kenshiro. I have an Onkyo SR705.

I threw in Crank on BR and all channels worked fine. PCM 7.1 shows up on the receiver.

rded, I did as you said. PS3 set to bitsream, all PCMs checked under audio settings. With Deja Vu (PCM 5.1), rears still do not work by choosing "Multich" listening mode.
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Old 10-27-2007, 12:35 AM
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Originally Posted by Romeo View Post
I checked all of my settings and don't see such an option Kenshiro. I have an Onkyo SR705.

I threw in Crank on BR and all channels worked fine. PCM 7.1 shows up on the receiver.
I think Crank is one of the few movies that has 6.1 PCM. What shows up on your receiver when you play other BD movies?
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Old 10-27-2007, 12:37 AM
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All of my other BR movies are 5.1 PCM. All show up correctly, it's just that all of them besides Crank will not output to the rear speakers unless I choose a different listening mode, which causes the receiver to alter the PCM track.
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Old 10-27-2007, 12:40 AM
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All of my other BR movies are 5.1 PCM. All show up correctly, it's just that all of them besides Crank will not output to the rear speakers unless I choose a different listening mode, which causes the receiver to alter the PCM track.
In the the PS3 audio options try unchecking all the 7.1 PCM boxes. Since you are not outputting 7.1 audio it might be confusing your receiver. Try that with both bitstream and PCM and see if that changes anything.
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