Sound Problem

[cybrey]

I have a problem with my popcorn hour A100. Its connected via HDMI to a plasma screen for video and the sound is sent via the co-axial digital out to an AMP.

Unfortunately I did two / three things at once and I can't work out which one is playing up. I had the whole thing working on firmware from 2-3 months ago playing content from Twonky which was on a NAS. I upgraded the twonky version and now it doesn't work ( different issue).

I then switched the Media streamer to Tversity running on a PC. This is working as I can pick up the server on a 360 and it plays avi's no problems at all with sound.

If I try the same avis on the popcorn hour I get video but no sound. I did upgrade the firmware on the popcorn hour to the latest whilst trying different options but still no sound.

Was just wondering if someone could suggest some likely debugging options. I'm reasonably convinced its a problem with a setting the PCH rather wiring / PC problem although I'm open to all suggestions.

[chris57]

You dont tell us what the audio type is or what settings you have for Tversity for audio or that type of file or what settings you have on your PCH. Makes it a little bit difficult to diagnose.

Make sure you dont have any Transcoding going on with Tversity, quality loss. Make sure the audio is passed through in its form and that your amp can decode it. Also check your wiring as CVBS is composite and coaxial is furthest right if you look from the rear. I say this as someone was saying no audio via their amp and had audio plugged into CVBS easy to do.

[cybrey]

(11-25-2008 04:51 PM)chris57 Wrote:  You dont tell us what the audio type is or what settings you have for Tversity for audio or that type of file or what settings you have on your PCH. Makes it a little bit difficult to diagnose.

Make sure you dont have any Transcoding going on with Tversity, quality loss. Make sure the audio is passed through in its form and that your amp can decode it. Also check your wiring as CVBS is composite and coaxial is furthest right if you look from the rear. I say this as someone was saying no audio via their amp and had audio plugged into CVBS easy to do.

Thanks for the reply.. I can answer some of these questions now;

The amp is wired correctly as it all worked a couple of months ago. The audio can definitely be decoded by the amp as its working on the 360, and of course was working a couple of months ago on the PCH. ( Mind it was streaming from Twonky then).

I haven't turned on any transcoding with TVersity but I did wonder if this was playing with it somehow.

Without breaking forum rules I can't tell you the avi types, but I'll look into this evening finding out what the audio is encoded in. I'll also take a note of the settings in PCH for audio.

[chris57]

Run the avi's through mediainfo, select text output and post the results, you can post everything apart from release crew names.

[daniel_owen_uk]

Let us know a bit more, which amp, what are your audio settings?

Can you get an mp3 to play?

Try it from a USB pen drive just to rule out the network.

[cybrey]

The amp isn't the problem (its a Yamaha 640RDS) as both the PCH and 360 can have / played these files... unless something in a recent firmware has changed.

Audio settings from PCH are;

HDMI Audio : Off ( I tried on and off)
Audio
DTS : Digital (RAW)
AC3 : Analog (PCM)
AAC : Analog (PCM)
WWA Pro : Analog (PCM)

All the files I've tried haven't got sound.. but here are some samples from mediainfo;

Quote:Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Codec ID : 55
Codec ID/Hint : MP3
Duration : 20mn 55s
Bit rate mode : Variable
Bit rate : 133 Kbps
Minimum bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Resolution : 16 bits
Stream size : 20.0 MiB (11%)
Alignment : Aligned on interleaves
Interleave, duration : 24 ms (0.58 video frame)
Interleave, preload duration : 446 ms
Writing library : LAME3.95
Encoding settings : ABR

Quote:Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Codec ID : 55
Codec ID/Hint : MP3
Duration : 40mn 56s
Bit rate mode : Variable
Bit rate : 134 Kbps
Nominal bit rate : 132 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Resolution : 16 bits
Stream size : 39.1 MiB (11%)
Alignment : Aligned on interleaves
Interleave, duration : 24 ms (0.58 video frame)
Interleave, preload duration : 517 ms
Writing library : LAME3.90.
Encoding settings : ABR

Cheers again,
Cy.

[gsterin]

I have absolutely the same problem once I set HDMI Sound Off
I expected that if it is off then sound will go through AUDIO OUT cables.
I connected them to the same TV(different input) and no sound.
The only way I could get soound of AUDIO OUT is not using HDMI at all.
I don't want to do that.
My goal is to connect NMT to TV using HDMI and use AUDIO OUT to amplifier.
Can't do that with the latest firmware? Is it a bug? Should I report it somewhere?

[cybrey]

The problem is almost certainly related to the Tversity server. I switched over to a samba connection yesterday and all the sound is back. Think I'll give up on the Tversity server.

Cheers for the help.