I found a problem when played on an ordinary TV (rather than a computer): due to interlacing, the horizontal stave lines suffer from "interline twitter". This makes the video very flickery, which means the viewer does not want to get too close to it, which makes it very difficult to see the detail of the score. I'm not sure what to do about this - could do more anti-aliasing but that would cost more resolution (alraedy at a premium), or could cause the score to be tilted at an angle and scroll diagonally but that would take some getting used to. I don't know if there's some way of making sure the stave lines always take 2 pixels. Meanwhile these DVDs can only really be used on non-interlaced displays (i.e. not standard TVs).
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