How to Use a Subtractive Analog Synthesizer is a short section taken from a commercial video series on the principles of subtractive synthesis.

via metakinetics:

This is a brief sample of an extensive introductory video tutorial on the principles of subtractive synthesis. Knowing these principles is essential to creating the evolving sounds often heard in various forms of electronic music. This video tutorial uses the Logic ES1 and ES2 as example virtual instruments to demonstrate the principles. Topics covered include signal flow, waveforms, filters, envelopes and LFOs.

This is a great video to get you started with one of these instruments: LinPlug Albino, Native Instruments Massive, Native Instruments Pro-53, Propellerhead Reasons Subtractor, Ableton Live Operator, Ableton Live Analog, Moog Voyager, Dave Smith Evolver, Prophet 5, Alesis Andromeda, Access Virus, Nord Lead Waldorf Q, Alesis ION, Alesis MICRON, Logic ES1, Logic ES2.