Melody - flute solo

Two interesting pieces for flute: Debussy Syrinx and Varese Density 21.5 (various recordings available) the scores can be accessed: Syrinx and Density.  Here is a good article examining both pieces with reference to melodic construction and the influence of the earlier piece on Varese's composition. And an interesting discussion of performance interpretation in Density.

Live electronics

Some examples of music for solo instrument with electronic processing:

• Music for hihat and computer Cort Lippe
• The Twittering Machine Andrew May
• Sequitur XIV Karlheinz Essl (and other interesting pieces). 

Noise and Subtractive Synthesis

We use the term noise for:

a) auditory sensation arising in response to non-periodic sound waves/signals, with flat and dense spectral distributions (vibrational/physical frame of reference) 

b) auditory sensation that is undesirable/unpleasant/unintended within a given context, interfering with auditory sensations that are desirable/pleasant/intended (i.e. sounds) within the same context (cognitive/semantic frame of reference, focusing on communication)

 Vassilakis et al lecture notes 

Also see Truax about the meaning of noise. 

A tutorial about using filters for subtractive synthesis (see also section 4-3 & 4-4 Music & Computers). Noise elements are actually used in music often, a very interesting example is the work of Italian composer Luigi Nono. Other examples include Ryoji Ikeda and Carsten Nicolai (alva noto) - Impulse or Fades.
and this is an article explaining different approaches to noise generation refining our understanding of the range of possible sounds: 

Atomic noise

KRISTOFFER JENSEN (2005).
Organised Sound, Volume 10, Issue01, April 2005 pp 75-81
http://journals.cambridge.org/action/displayAbstract?aid=306542