fitsjohn Posted March 14, 2006 Share Posted March 14, 2006 Hi there .I have a system with 2 pioneer DVD Scratch players and a numark vision mixers. I have 3 preview monitors ,1 for each source and 1 to view the output going to the projector. On some of my music dvds the outputs from mixer to projector and monitor are in black and white? even though on the source monitor it is in colour. I have narrowed it down to the numark mixer. Its only on 10% the dvds but it will always happen on the same dvds in either source. The source preview to monitor is coming directly from the player. Any Ideas, what can be the differences in the dvds? as they will play fine on my laptop. Cheers John. Link to comment Share on other sites More sharing options...
Andrew C Posted March 14, 2006 Share Posted March 14, 2006 Any chance that they are NTSC discs from the 'States? Link to comment Share on other sites More sharing options...
fitsjohn Posted March 14, 2006 Author Share Posted March 14, 2006 I am pretty certain they arent but will double check tomorrow? They are working ok through the mixer !!! Link to comment Share on other sites More sharing options...
paulears Posted March 14, 2006 Share Posted March 14, 2006 The trouble is that most monitors will happily accept any format of signal now and autoswitch, usually without any user notification - so the ntsc guess may well be accurate. the only other thing could be some versions of copy protection which distort the sync waveform - often messing with the colour burst and or other sync elements - most monitors will be happy, but the system is designed to mess up the agc on vcrs - maybe the numark mixer is not seeing what it expects, applying a little level reduction, and the colour burst is then too low, knocking out the colour - a guess, really, but maybe worth borrowing a scope and having a look at what is coming out of the player on the dodgy tracks? Link to comment Share on other sites More sharing options...
back_ache Posted March 17, 2006 Share Posted March 17, 2006 make sure your DVD players are set to output PAL only Link to comment Share on other sites More sharing options...
Bobbsy Posted March 17, 2006 Share Posted March 17, 2006 My guess is that Paulears has it. The DVDs in question probably has some form of Macrovision or similar copyright protection. It's put there to prevent copying but does so by messing up the syncs (often inverting them on alternate lines). Monitors will still accept the signal but VCRs won't record it properly. I'd guess that, since a vision mixer depends on syncs, it would be messed up as well. I'd suspect that NTSC wouldn't go through the mixer at all if it's output in native 525 line NTSC (as opposed to NTSC with a 4.43 subcarrier which is what some systems output). Bob Link to comment Share on other sites More sharing options...
back_ache Posted March 17, 2006 Share Posted March 17, 2006 some form of Macrovision or similar copyright protection. If it is that, it is straightforward to get round it, but how is not for public disscusion, even if the need is legit. Link to comment Share on other sites More sharing options...
gnomatron Posted March 25, 2006 Share Posted March 25, 2006 I'd suspect that NTSC wouldn't go through the mixer at all if it's output in native 525 line NTSC (as opposed to NTSC with a 4.43 subcarrier which is what some systems output). Bob I'd be surprised by that, numark are an american company after all. Link to comment Share on other sites More sharing options...
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