Klaas Robers wrote:When looking again to both recodings I see that the picture quality, sharpness and so on, is visibly better on Andrews. Also in the recording of Grand Illusions the frame sync is 3 or 4 lines out of phase. You see at the left side of the picture 3 or 4 lines that should be at the right side, so you mis there a stroke. I know that the MUTR televisor tends to mis-synchronise for one line, + or -, but I never saw this large amount. I fear that the paper label with sync information (the black squares) was not glued in the right position.
But in Andrews recording there is a slight instability in the synchronisation, the picture is somewhat moving up and down. I know, it is difficult to get that better, my monitor also suffers from that, however this is not visible in the Illusions recording. And I saw in your recording Andrew, some small black dots moving slowly up or down. Any idea where they are generated?
I have the feeling that you recorded picture and sound separatedly and you joined them afterwards again, because I see in the singing no coincidence in sound and picture, especially at the end. As far as I remember, this was not in the original video and sound.
This was an in-progress recording as I was building my televisor. It is now rock-solid on the synchronisation. But yes, it does appear to be much sharper and better quality. Also, it's quite possible I had the sound out of synch too in this demo. The small black dots (or, the white band too) are artefacts caused by the frame rate of the phone camera and its synchronisation with the rate of the disc spinning. The frame rate on the camera is auto-adjusting, and I was eyeballing the resultant image and shifting slightly in my whole body in front of a light behind me, thus affecting the total avalable light detected by my camera - and hence the resultant exposure/frame rate it employed when auto-adjusting these things. That's just my screwy way of recording with my phone camera and (mostly) avoiding the black bands. Another way of putting this; the black dots are the very edge of the black bands - just on the threshold of the timing/frame rate where they would be seen. And the white bands are on the other side of things - timing is wrong in the other direction (too slow an exposure on the camera).
I think you are probably right that I recorded picture and sound separately and rejoined. Again, this was just an in-progress build of my televisor and a test image and I never expected to be discussing the hows and wherefores a few years later!!