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I have no idea what I am saying, or if this would even work well, but I had an idea of combining two audio sources to maybe increase quality. I was inspired by spoRv's PaNup to maybe combine the signals of both a decoded lossy AC3 and DTS track from the same DVD(or LD) and combine them to make something a bit less lossy, for editing purposes. (Mainly standards conversion through speeding up or slowing down. ) 

I wonder what people's thoughts are on this, or if I am completely crazy ?

I tested it now, it appears to have worked partially... It seems that the DTS and AC3 lose sync about half-way through (notice first half is missing bands of frequencies, due to phasing.)

AC3:


COMBINED:


Notice how on the part that did work though, there seem to be less spectral holes!

No, the idea is not crazy - in theory it *should* work; in practice, the two tracks should not only be in sync by video frame, but also to the sample; so, probably it could work straight-out-of-the-box for movies that have both DD and DTS tracks in the same disc - thinking about DVDs in particular, but also some BDs (HD-DVDs too?)

Go on with the experimentation!

P.S. Thanks to have chosen your technique name as a the reference to PaNup; still, it's quite difficult to pronounce; I'd go for something easier; what's about AnDmix - AC3 and DTS mix?

(2021-11-03, 11:22 AM)spoRv Wrote: [ -> ]No, the idea is not crazy - in theory it *should* work; in practice, the two tracks should not only be in sync by video frame, but also to the sample; so, probably it could work straight-out-of-the-box for movies that have both DD and DTS tracks in the same disc - thinking about DVDs in particular, but also some BDs (HD-DVDs too?)

Go on with the experimentation!

P.S. Thanks to have chosen your technique name as a the reference to PaNup; still, it's quite difficult to pronounce; I'd go for something easier; what's about AnDmix - AC3 and DTS mix?

Unfortunately the thing I tried it on, for whatever reason, wasn't synced, and the DTS seems to have slightly different (louder) mastering. (from the same disc!!!) But it should work on anything else hopefully.. BD and HD-DVD would hopefully have lossless tracks !!

Re.S.: AnDmix is a good name, not sure where the n comes from, '&'? I will say it's probably better though, it's hard to even find out whatac3 stands for , closest i could find was 'audio codec 3' which is very vague

AC-3 and DTS mix = AaDmix sounds bad... but AnDmix = AC-3 'n' DTS mix sounds better!

AC-3 it's actually Audio Codec 3 - that came after, guess? Audio Codec 1 and Audio Codec 2... Dolby has always a lot of fantasy with names - like Dolby Surround (the upmixer) getting the same name of its ancestor matrix process, Dolby Audio, Dolby Vision... wow...

DTS was famous to raise up the volume, so IMHO you should take every track from AC-3 and adjust the DTS at the same level (or the contrary) as for example the L R C could have the same levels while LFE and S could be different... not a simple task, huh?

I did try that , it's not horribly difficult

(2021-11-03, 06:36 PM)Mediahead Wrote: [ -> ]I did try that , it's not horribly difficult

Update on this, I now know of a programme called DeltaWave which is quite good at automatically aligning audio tracks! I may try this technique with that programme at some point in the future.