Electronic Music Theory Book

amici della computer music, musica elettronica e interattiva, amanti del suono, matematica e teoria dei segnali… facendo ordine ho ritrovato questa piccola bibbia sulla Musica Elettronica, scritta niente popodimeno che da Miller Puckette (MIT Media Lab e poi IRCAM dove creò Pure Data da cui è stato poi sviluppato Max/MSP). da giovane ho lavorato molto in questo mondo che consiglio a chiunque voglia approfondire la Musica Interattiva. come tutti i grandi, il libro è una risorsa free per tutti (online html o PDF) a questo indirizzo: http://msp.ucsd.edu/techniques.htm

se spulciate il suo ito, troverete anche tutti i video dei corsi che ha tenuti negli ultimi anni, tra cui:

• Compositional algorithms
• Musical Acoustics
• Survey of Electronic Music Techniques II
• Computer Music
• Real-time computer music software design
• Feedback and Distortion
• Stored and Live Control Streams for Real-time Electronic Music
• Fourier analysis, synthesis, and processing
• The voice as musical instrument
• Inside Pure Data
• Analysis of Musical Sound
• Compositional algorithms trascrivo qui l’indice del libro giusto per stuzzicare i ricercatori.

Sinusoids, amplitude and frequency

• Measures of Amplitude
• Units of Amplitude
• Controlling Amplitude
• Frequency
• Synthesizing a sinusoid
• Superposing Signals
• Periodic Signals
• About the Software Examples
  • Quick Introduction to Pd
  • How to find and run the examples
• Examples
  • Constant amplitude scaler
  • Amplitude control in decibels
  • Smoothed amplitude control with an envelope generator
  • Major triad
  • Conversion between frequency and pitch
  • More additive synthesis

Wavetables and samplers

• The Wavetable Oscillator
• Sampling
• Enveloping samplers
• Timbre stretching
• Interpolation
• Examples
  • Wavetable oscillator
  • Wavetable lookup in general
  • Using a wavetable as a sampler
  • Looping samplers
  • Overlapping sample looper
  • Automatic read point precession

Audio and control computations

• The sampling theorem
• Control
• Control streams
• Converting from audio signals to numeric control streams
• Control streams in block diagrams
• Event detection
• Audio signals as control
• Operations on control streams
• Control operations in Pd
• Examples
  • Sampling and foldover
  • Converting controls to signals
  • Non-looping wavetable player
  • Signals to controls
  • Analog-style sequencer
  • MIDI-style synthesizer

Automation and voice management

• Envelope Generators
• Linear and Curved Amplitude Shapes
• Continuous and discontinuous control changes
  • Muting
  • Switch-and-ramp
• Polyphony
• Voice allocation
• Voice tags
• Encapsulation in Pd
• Examples
  • ADSR envelope generator
  • Transfer functions for amplitude control
  • Additive synthesis: Risset’s bell
  • Additive synthesis: spectral envelope control
  • Polyphonic synthesis: sampler

Modulation

• Taxonomy of spectra
• Multiplying audio signals
• Waveshaping
• Frequency and phase modulation
• Examples
  • Ring modulation and spectra
  • Octave divider and formant adder
  • Waveshaping and difference tones
  • Waveshaping using Chebychev polynomials
  • Waveshaping using an exponential function
  • Sinusoidal waveshaping: evenness and oddness
  • Phase modulation and FM

Designer spectra

• Carrier/modulator model
• Pulse trains
  • Pulse trains via waveshaping
  • Pulse trains via wavetable stretching
  • Resulting spectra
• Movable ring modulation
• Phase-aligned formant (PAF) generator
• Examples
  • Wavetable pulse train
  • Simple formant generator
  • Two-cosine carrier signal
  • The PAF generator
  • Stretched wavetables

Time shifts and delays

• Complex numbers
  • Complex sinusoids
• Time shifts and phase changes
• Delay networks
• Recirculating delay networks
• Power conservation and complex delay networks
• Artificial reverberation
  • Controlling reverberators
• Variable and fractional shifts
• Fidelity of interpolating delay lines
• Pitch shifting
• Examples
  • Fixed, noninterpolating delay line
  • Recirculating comb filter
  • Variable delay line
  • Order of execution and lower limits on delay times
  • Order of execution in non-recirculating delay lines
  • Non-recirculating comb filter as octave doubler
  • Time-varying complex comb filter: shakers
  • Reverberator
  • Pitch shifter

Filters

• Taxonomy of filters
  • Low-pass and high-pass filters
  • Band-pass and stop-band filters
  • Equalizing filters
• Elementary filters
  • Elementary non-recirculating filter
  • Non-recirculating filter, second form
  • Elementary recirculating filter
  • Compound filters
  • Real outputs from complex filters
  • Two recirculating filters for the price of one
• Designing filters
  • One-pole low-pass filter
  • One-pole, one-zero high-pass filter
  • Shelving filter
  • Band-pass filter
  • Peaking and stop-band filter
  • Butterworth filters
  • Stretching the unit circle with rational functions
  • Butterworth band-pass filter
  • Time-varying coefficients
  • Impulse responses of recirculating filters
  • All-pass filters
• Applications
  • Subtractive synthesis
  • Envelope following
  • Single Sideband Modulation
• Examples
  • Prefabricated low-, high-, and band-pass filters
  • Prefabricated time-varying band-pass filter
  • Envelope followers
  • Single sideband modulation
  • Using elementary filters directly: shelving and peaking
  • Making and using all-pass filters

Fourier analysis and resynthesis

• Fourier analysis of periodic signals
  • Periodicity of the Fourier transform
  • Fourier transform as additive synthesis
• Properties of Fourier transforms
  • Fourier transform of DC
  • Shifts and phase changes
  • Fourier transform of a sinusoid
• Fourier analysis of non-periodic signals
• Fourier analysis and reconstruction of audio signals
  • Narrow-band companding
  • Timbre stamping (classical vocoder)
• Phase
  • Phase relationships between channels
• Phase bashing
• Examples
  • Fourier analysis and resynthesis in Pd
  • Narrow-band companding: noise suppression
  • Timbre stamp (“vocoder”)
  • Phase vocoder time bender

Classical waveforms

• Symmetries and Fourier series
  • Sawtooth waves and symmetry
• Dissecting classical waveforms
• Fourier series of the elementary waveforms
  • Sawtooth wave
  • Parabolic wave
  • Square and symmetric triangle waves
  • General (non-symmetric) triangle wave
• Predicting and controlling foldover
  • Over-sampling
  • Sneaky triangle waves
  • Transition splicing
• Examples
  • Combining sawtooth waves
  • Strategies for band-limiting sawtooth waves