To accompany the transformations I wanted a completely unrealistic sound. First I tried rhythmic beats, like a heartbeat. We tried every sort of drum… - Rouben Mamoulian

Shakespeare used the soliloquy to give oral expression to thoughts. Since then the soliloquy had become obsolete. But it was a wonderful device: so I wanted to use a close-up of Sylvia Sidney, alone, in prison, and superimpose over it all her impressions and recollections. Again, everybody insisted it was impossible and that the audience would never understand what was going on. I argued that in the silent cinema they had used – and the audience had accepted – stylisation: simile, visual poetry. So why not in sound? That’s what I wanted to do with sound and, later, with colour. Now, of course, this use of audible thoughts over a silent close-up has become a convention.

[In 1927] Porgy made me overnight. In it I tried all my ideas of a dramatic integration of many elements ... At this time I felt it should be possible, in a stage production, to take a snapshot of the stage picture at any moment, and record an artistic composition. So each movement and grouping was minutely rehearsed. The actors were often required to adopt poses which were neither comfortable nor natural, but which looked right on the stage. That's stage truth.

Colour cinematography tends to brighten and cheapen natural colour. The problem was to counteract that. I realised that colour in films is nearer to painting than to the stage. Now if you look, for instance, at a crimson cloak painted by El Greco, you’ll find that what first appears as a mass of colour is in fact a subtle blending of all sorts of shades, with patches of pink and blue and purple and green. So I treated the colour the way a painter would.