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Old 22nd July 2008, 09:33   #1  |  Link
jonathonsunshine
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clipping/static/distortion in Surcode encoded DTS audio

Howdy all.

I have encoded some DTS audio via following method

1) Use Eac3to to output 6 mono wavs from the 5.1 LPCM track of a blu-ray.
2) Encode the 6 wavs to DTS using Surcode 1.0.21
3) Run the DTS through Eac3to "remove the zero padding" (I don't know what this Zero Padding is, but i know that until i remove it, the DTS track plays slightly slower than it is supposed to.)

Ok, so I was listening to it, and I can here this occasional static/popping, as if I had my speakers cranked up to to loud. Except they wern't up terribly, and I have really good brand new speakers (Logitech z5500). So I played some other stuff, with original untouched audio, Die Hard 4 with original DTS and Rambo 4 with original Dolby, and I didn't notice it.

Unfortunatly, I don't have access to the original sources.

So my question is, is Surcode like... crappy or something ? The person who 1st clued me into the Zero Padding thing and how to fix the sync issues, referred to Surcode as being a "Dirty Encoder"...

Last edited by jonathonsunshine; 22nd July 2008 at 10:15.
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Old 3rd August 2008, 09:35   #2  |  Link
jonathonsunshine
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i got my hands on the source files again, seems that the clipping issues are actually in the source files. so that effectivly brings this issue to a close.
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Old 3rd August 2008, 20:40   #3  |  Link
specise_8472
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Quote:
Originally Posted by jonathonsunshine View Post
3) Run the DTS through Eac3to "remove the zero padding" (I don't know what this Zero Padding is, but i know that until i remove it, the DTS track plays slightly slower than it is supposed to.)
In Surcode save the file as a .CPT which is the Compact Non Zero Padded DTS. Then just rename file to .DTS. Quicker than trusting another program to edit the file.
EDIT: Just a quick aside..DTS recommend using .CPT, especially if using Maestro to author DVD's.
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Old 4th August 2008, 00:42   #4  |  Link
EPiPH0NE
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Why not just do:

eac3to input.lpcm output.dts

I did that for quite a while w/o any issues or 'dirtiness'. I would also suggest stepping up to Surcode 1.0.23 and then try again.
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Old 4th August 2008, 14:06   #5  |  Link
raquete
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Quote:
clipping/static/distortion in Surcode encoded DTS audio
happens sometimes if the yours 6 mono sources have too loud volume and are PCM 32-bit normalized float (type 3) format.
if they are, change to PCM 32-bit,4-byte integer (type 1).

Last edited by raquete; 4th August 2008 at 14:11.
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