[Here is some documentation from one of  the activities for the 're-mapping the senses workshop earlier this year...] Our sense of taste is directly affected by the colour and smell of the food. Experiments prove that the colour of a drink affects our perception of its sweetness for example. Altering the sound of the food, say adjusting the high-end frequencies while eating crisps can also affect our perception of the crunchiness of those crisps [see the paper here. Playing with these assumptions and expectations can create heightened food experiences. There have been a number of studies that suggest it is possible to simulate Sweetness, bitterness, sourness. Specifically, we test these settings as claimed by the Vocktail project [see below] to simulate the following sensations... Sour: magnitude of current: 180