I have a Yamaha RVX640 AV amp which comes with a variety of DSP modes. I occasionally play around with the Cinema effects and am curious as to what benefit they actually offer. The Cinema #1 modes seem to add some reverb - being based around old-style cinemas with dodgy accoustics. But why would I want to corrupt a soundtrack in this way? Am I missing the point here...? The Cinema #2 modes are modelled on more recent cinemas - and therefore have no discernable reverb. Consequently I can't really detect the diference between these and the standard PL2 and DD/DTS modes. Perhaps I'm not listening hard enough. The only mode that I'm tempted to use is the 'Mono Movie' mode which, ironically enough, adds shedloads of reverb to a mono signal resulting in a very 'otherwordly' effect. It's just this very effect that astonishingly mimics the experience I used to get when seeing films in my local Granada cinema which had awful accoustics and just the one big speaker behind the screen. Hearing this effect applied to a soundtrack instantly transforms me back 30-odd years to the days of crappy 2nd features about yacht races and those dreadful stock-adverts for local high-street shops. I'm not sure that it actually does the soundtracks any help, however, as I usually settle on 'PL2 Music' mode for Mono movie soundtracks. I'd be interested to hear of other's opinions on this subject. Cheers, Crispin.