Have spent some time considering how I want the painting to be read, and have come up with a few ideas.
The first example shows the picture being read from left to right, in the same way as a piece of text.

The next example shows the picture being read from the centre outwards. I think this would suit a picture that had a focal point in the centre, however for the piece I have chosen I don’t think it will be suitable.

Finally, I have considered reading the painting in the way shown below. At the moment, this is the direction i am favouring, as I believe that the eye is drawn to the darker colours at the bottom of the painting initially, before being lead out to the lighter areas.

I have devised a basic way of controlling the order in which the sounds play, however this needs some work now applying how I want the painting to be read.
I would appreciate any feedback on the above.