User interface for generating parameter values in media presentations based on selected presentation instances

An apparatus for varying an attribute of a media presentation, the apparatus comprising

• a storage device coupled to a processor, user input device and display device;
• one or more instructions for accepting signals from a user input device to select a first media presentation having a parameter with a first value;
• one or more instructions for accepting signals from a user input device to select a second media presentation having the parameter with a second value;
• one or more instructions for accepting signals from a user input device to generate a new value;
• and
• one or more instructions for presenting, on the media presentation device, a new media presentation using the new value of the parameter.

A computer program embodied on a computer-readable medium for varying an attribute of a media presentation, wherein the attribute is derived from a parameter having a value, the computer-readable medium comprising

• one or more instructions for accepting signals from a user input device to select a first media presentation having a parameter with a first value;
• one or more instructions for accepting signals from a user input device to select a second media presentation having the parameter with a second value;
• one or more instructions for accepting signals from a user input device to generate a new value;
• and
• one or more instructions for presenting, on the media presentation device, a new media presentation using the new value of the parameter.

A computer data signal embodied in a carrier wave for varying an attribute of a media presentation, wherein the attribute is derived from a parameter having a value, the computer-readable medium comprising

• one or more instructions for accepting signals from a user input device to select a first media presentation having a parameter with a first value;
• one or more instructions for accepting signals from a user input device to select a second media presentation having the parameter with a second value;
• one or more instructions for accepting signals from a user input device to generate a new value;
• and
• one or more instructions for presenting, on the media presentation device, a new media presentation using the new value of the parameter.