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No Sound Over HDMI Output ATI HD4650 | RedFox Forum
https://forum.redfox.bz/threads/no-sound-over-hdmi-output-ati-hd4650.39573/
Also, most TVs only accept LPCM 2.0 (stereo) over HDMI; you'd be lucky if it passed thru DD 5.1 from HDMI in to optical/coax out. The 4650 would have been better for playing BDs; however, you would also need an audio receiver with true HDMI audio inputs (not a low-end one with only "passthrough" HDMI inputs) to make full use of it.
Overview of LPCM
https://recoverit.wondershare.com/overview-of-lpmc.html
LPCM audio is uncompressed audio signals and is also known as PCM. It is a standard for all CD and DVD technology. Being uncompressed audio format, there is no loss in sound quality on the disc with the LPMC technique. However, it's one disadvantage that it takes a lot of space.
How to send bitstream and not Multi-LPCM from HTPC | The ...
https://emotivalounge.proboards.com/thread/11888
send bitstream and not Multi-LPCM from HTPC over HDMI. My system is : Windows XP HTPC with ATI 4650 HDMI + UMC-1 + 7.1 speakers. I installed all latest drivers (Catalyst 10.5) and set 7.1 in control pannel->speaker setup. I havn't installed Mother-board audio driver. I use VLC player.
Linear Pulse Code Modulated Audio (LPCM)
https://www.loc.gov/preservation/digital/formats/fdd/fdd000011.shtml
Full name: Linear Pulse Code Modulated Audio (LPCM) Description: Pulse code modulation (PCM) with linear quantization. PCM is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code.
The Perfect HTPC Cards - ATI Radeon HD 4350 and 4550 ...
https://www.anandtech.com/show/2630/2
The Perfect HTPC Cards. Like the rest of the Radeon HD 4000 series (4870, 4850, 4670 and 4650) the new Radeon HD 4550 and 4350 both support 8-channel LPCM over HDMI.This makes these two cards the ...
What is LPCM - Linear Pulse Code Modulated Audio
https://www.appgeeker.com/audio/what-is-lpcm.html
LPCM is a lossless audio coding that delivers CD quality sound, so it occupies huge disc space. LPCM is used to transmit uncompressed digital audio information via HDMI (High-Definition Multimedia Interface). Note: The principle for LPCM and PCM are the same except in sample rate and quantization precision.
Audio over DVI port in AMD/ATI Radeon 5870? | AVS Forum
https://www.avsforum.com/threads/audio-over-dvi-port-in-amd-ati-radeon-5870.1204272/
In my Radeon 4650 card I could pass the 5.1 LPCM audio over the DVI port or the HDMI port. In the 5870 I can only pass the 5.1 LPCM audio over the HDMI port. Is there a way to configure the 5870 to pass the multichannel LPCM audio over one of the DVI ports? My setup: Windows 7 Ultimate RC 64bit Catalyst 9.11
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