DTS WAV playback broken from 0.9-u4 onwards

[Calibrator]

That would still be a nice to have situation rather than having to change back each time I want to play DTS files but its no real drama now.

Yeah, but ... Apart from that I will make it work as should (being : it not being necessary to set the DAC to 44.1/16), does your receiver show that it's capturing 24 bits ? I hardly can imagine that, but I also can't imagine me making 16 bits of a 24 bit file and your DTS decoding still works ...

When playing back DTS encoded files, my receiver only shows the total bit rate ( 1411 or 1536 kbps ) together with the frequency ( 44.1 or 48KHz ). When playing back under 0.9U-10 I was seeing 1536/44.1 rather than the expected 1536/48 which was confirmed by the slowing of the playback sound.

This new engine now shows 1536/48 as I normally would expect to see.

For 2 channel files my receiver shows the bits anywhere 16 and 24 together with sample frequency of anywhere between 44.1 and 96.

Russ

[PeterSt]

But can the 1536 be right with 24 bits ? I mean, it shows that too on 16 bit files. How can that be ?

[PeterSt]

Russ, I think something else is going on.

First, in the program I can't see what is wrong.
Second, the bit rate for an 48/24 should be 2304 (padded to 32 bits !!). It just is doing that ...

How this is related to DTS, including that before it worked, I don't know. But IMO when you set the DAC to 16 bits and it plays, you'd be playing with 16 bits. The other 8 are just cut.
Possibly before that just happened the same, but with DAC is set to 192/24 (etc.). I can't tell (without rather excessive back tracing).

In either case (DAC is 16 or DAC is 24) a normal 48/24 file (no DTS) just plays. And on this matter I can't see the difference with encapsulated DTS ...

[PeterSt]

Ok ...

I've downloaded an assumed 48/24 DTS, and the bit rate it shows is ... 1536.

Now, what do I miss ?
I think we all agree about a normal 44.1/16 having a bit rate of 1411. So, (1411 / 44100) * 48000 = 1536, right ? So where are the additional bits ?

Two wave editors show the same ... 48/16.

Please note this is not only about the bitrate, but also about the "words" forming a sample. This just says two bytes (16 bits) ...
So, if this is supposed to be 24 bits really, there's no way I can discern (I think).

What remains, is how did this play before then ?

??

[Calibrator]

hmmmm ... now you have me wondering and thinking !

The way I produce my DTS wav's is to extract the surround tracks ( normally from DVD-Audio discs ) using magic, and then split them into their individual 6 channel's, and then, if needed, convert down to 24/48 streams. These 6 channels then get fed into SurCode DVD DTS specifying 48KHz output format.

Now then, the 1536kbps that I'm seeing on my processor status indicates that its seeing a 32/48 stream ( 32 x 48 = 1536 ) which hopefully suggests that the input files that make up the DTS wav's were padded to 32 bit as part of the encoding process. A worse scenario would be that those 24 bit input channels are getting cut back to 16 bits but that wouldn't make sense.

So, my referring to my DTS files as 24/48 may not strictly be true if they are being padded/chopped somehow in the final encoding process.

I need more time to follow up on this one methinks.

Regardless, they still sound very nice

Cheers,

Russ

[PeterSt]

Hehe Russ, I know it's getting late out there, but I don't think it works like that. Look :

44.1 x 16 = 705.1 right ? but it should be 1411 ...

Besides, in your math of 32 x 48 = 1536, the fact that it's 24 bits isn't incorporated. And no, it is not 32 bits because we're talking about the INPUT, and then your math would be 24 x 48 = 1152. But in both cases you it seems to be allowed to simply it by means of multiplying by 2 (the actual math goes more complex).

Now, when it is most probable that you indeed cut the 24 bits to 16 during the process (of ripping - reauthoring), I think I can fairly say that before all worked because with the DAC set to more than 16 bits, it worked out to code processing 16 bits only anyway. It are these things which have changed (lately). Now :

What I explicitly applied for 44.1/16 best SQ, I have now done just the same for 48/16 and all of the other /16 sample rates (up to 192000). So, with the below XXEngine3 it all should work again for the DAC Is set to more than 16 bits. Please note that the playback code is exactly the same, and indeed you don't need to switch the DAC Is for that.

Obviously when this now all works, you have re-ripped your DTS 24 bits files, and now *they* don't work .
But I think they do ...

[Calibrator]

Hehe Russ, I know it's getting late out there,

... and all these numbers are going to ensure I stay awake for many more hours trying to digest it all ... LOL

But, the good news is, the latest engine you just posted works fine

I can have my DAC setting at any value and it still works as expected.

I really appreciate you working on this during your Sunday morning over there 

I hope nothing got broken in the existing coding in your quest to solve my problem.

A bit more surfing on DTS encoding then its off to  for me.

Cheers,

Russ

[PeterSt]

I hope nothing got broken in the existing coding in your quest to solve my problem.

Well, I hope the only thing which is broken here is the electronic filling out of tax forms (some other x million dutch will be doing today).
Guys, try doing it separate for you and your partner. Won't work anymore.