Collection of useful links for music synthesis, some of which became outdated and have been replaced with archive.org alternatives.
Selected articles from the Sound On Sound magazine (archived 2015):
Jargonbuster (archived): SOS Technical Glossary
Synth School 1997 (archived): Part01 Part02 Part03 Part04 Part05
Synth School 1998 (archived): Part06 Part07 Part08 Part09 Part10 Part11 Part12
Article 1999-04 (archived): 20 Tips on Synth Programming
Synth Secrets 2000 (archived): 09 10 11 12 13 14 15 16 17 18 19 20
Synth Secrets 2001 (archived): 21 22 23 24 25 26 27 28 29 30 31 32
Synth Secrets 2002 (archived): 33 34 35 36 37 38 39 40 41 42 43 44
Synth Secrets 2003 (archived): 45 46 47 48 49 50 51 52 53 54 55 56
Q&A 2005-12 (archived): Granular Synthesis 101
Q&A 2006-02 (archived): Synthesis types history
Q&A 2006-03 (archived): Creating old-sytle synth strings
Q&A 2006-12 (archived): When to normalise
Wikipedia: Digital Signal Processing
Synth Museum: Linear vs. Exponential
Harmony Central (archived): MIDI Effects Explained
Links to sites with instrument, patch or soundfont collections:
GM & GS - Free Fluid (R3) General MIDI SoundFont plus Roland Sound Canvas extensions.
FreePats alsa.opensrc.org - Completely free and open set of instrument samples.
HammerSound.net - Free and non-free soundfonts.