BitPerfect: PCM Bit-Perfect Tester

[pipefan413]

How about Audacity for recording instead (in order to prevent dithering, in 24-Bit PCM during capturing and saved as 16-Bit PCM, truncating the less significant 8 Bits per sample)?

If he has REAPER, I honestly wouldn't recommend pissing about in Audacity since REAPER is 100% known "good configuration". I tried all sorts in Audacity and could not get it bit perfect with my U24 or my other card that both work 100% in REAPER. I know you managed it somehow but I honestly tried everything I could think of: every single interfacing mode (WASAPI, DirectSound etc.), dithering is 100% definitely switched off completely, and so on. And yet not bit perfect for me, even with the U24 XL.

IMO best thing to do is start with checking every setting to make sure it is as it should be and if there's still and issue it honestly must be either the disc or the player, because we know for a fact that REAPER in this configuration with this capture device absolutely is bit perfect. So if it isn't, it's being fed imperfect data, which means disc or player. Best not confuse with Audacity or anything else in my opinion.

Might be worth trying something different to decode just in case but I was only having issues with dtsparser because it was being fed garbage data.

EDIT: Also...

The wav itself is solid noise and appears as a single block waveform on audacity.

... this seems to suggest that it hasn't resampled; when I had issues the data was *not* a solid block. This again has me thinking that it could be a disc/player thing, but obviously important to 100% rule out everything else (software, settings, drivers, etc.)

[zoidberg]

If you have DTS LDs then you don't need to burn a test CD. Just spin up a LD

[pipefan413]

If you have DTS LDs then you don't need to burn a test CD. Just spin up a LD

Good point! I feel like he does...

[captainsolo]

Oh! So just try the process with a part of a DTS LD then?

[zoidberg]

Yeah, just cap the start of a DTS laserdisc. The test CD was put forward as a method for testing bit-perfect capture for those without DTS LDs or an AC-3 demodulator

[alexpeden2000]

Finally got round to setting my U24 with Reaper, my laptop & LD player and all working - then right at the same time my desktop (and CD burner) stops working, typical! Going to be in the repair place for the next week or two but have downloaded the kit and will report back once up & running again..

[zoidberg]

Bummer, hope it's an easy fix. Welcome to the LD capture club

[captainsolo]

I capped the opening of a DTS LD and everything went fine until I tried DTS parser on the final file. It doesn't even show a progress bar and spits out a virtually tiny dts file that doesn't do anything. Trying to rerun parser on the original file just gives me an error in French I think.

[pipefan413]

I capped the opening of a DTS LD and everything went fine until I tried DTS parser on the final file. It doesn't even show a progress bar and spits out a virtually tiny dts file that doesn't do anything. Trying to rerun parser on the original file just gives me an error in French I think.

Have you set up the ESI config exactly as described (44.1 kHz, "professional" mode, digital)? It defaults to 48 kHz etc.

How is REAPER configured? (If you're using Audacity, I'd recommend for the time being that you don't, maybe try that once you've confirmed it working in REAPER first because that just introduces more complications imo.) Be as specific as possible and somebody can probably point you in the right direction. Screenshots might help.

The problem most likely isn't DTSParser but rather something in the capture chain, methinks.

[captainsolo]

I set everything as indicated by Bronan's posts. I have the 44.1 set, the asio and everything else is identical in Reaper. When I capture I get the solid block of noise and the output file is 16/44.1 2.0.