Render Notes Five is a non-realtime monophonic synthesizer with a simulated anolog synth section and a sample playback section. It's a command line program written in c. New to the August 16th 2010 version: lfo to sample pitch, a second lfo, a second envelope generator, envelope to pitch and other stuff that I forgot. Complete source code (GPL-2) is available at my stuff page at http://www.bestweb.net/~pogo/stuff.html
short audio demo: http://www.bestweb.net/~pogo/rn5_demo.mp3
p.s. - the tar is source only