musicdsp.org source code archive

Analysis

• Beat Detector Class
  
• Coefficients for Daubechies wavelets 1-38
  
• DFT
  
• Envelope detector
  
• Envelope Detector class (C++)
  
• Envelope follower with different attack and release
  
• Fast in-place Walsh-Hadamard Transform
  
• FFT
  
• FFT classes in C++ and Object Pascal
  
• Frequency response from biquad coefficients
  
• Java FFT
  
• Look ahead limiting
  
• LPC analysis (autocorrelation + Levinson-Durbin recursion)
  
• Magnitude and phase plot of arbitrary IIR function, up to 5th order
  
• Measuring interpollation noise
  
• QFT and DQFT (double precision) classes
  
• Simple peak follower
  
• tone detection with Goertzel
  
• Tone detection with Goertzel (x86 ASM)
  

Effects

• 2 Wave shaping things
  
• Alien Wah
  
• Band Limited PWM Generator
  
• Bit quantization/reduction effect
  
• Class for waveguide/delay effects
  
• Compressor
  
• Decimator
  
• Delay time calculation for reverberation
  
• DIRAC - Free C/C++ Library for Time and Pitch Manipulation of Audio Based on Time-Frequency Transforms
  
• dynamic convolution
  
• Early echo's with image-mirror technique
  
• ECE320 project: Reverberation w/ parameter control from PC
  
• fold back distortion
  
• Guitar feedback
  
• Lo-Fi Crusher
  
• Most simple and smooth feedback delay
  
• Most simple static delay
  
• Parallel combs delay calculation
  
• Phaser code
  
• Polynominal Waveshaper
  
• Reverberation Algorithms in Matlab
  
• Reverberation techniques
  
• Simple Compressor class (C++)
  
• smsPitchScale Source Code
  
• Soft saturation
  
• Stereo Enhancer
  
• Stereo Field Rotation Via Transformation Matrix
  
• Stereo Width Control (Obtained Via Transfromation Matrix)
  
• Time compression-expansion using standard phase vocoder
  
• transistor differential amplifier simulation
  
• Variable-hardness clipping function
  
• WaveShaper
  
• Waveshaper
  
• Waveshaper
  
• Waveshaper (simple description)
  
• Waveshaper :: Gloubi-boulga
  

Filters

• 1-RC and C filter
  
• 18dB/oct resonant 3 pole LPF with tanh() dist
  
• 1st and 2nd order pink noise filters
  
• 3 Band Equaliser
  
• 303 type filter with saturation
  
• All-Pass Filters, a good explanation
  
• Another 4-pole lowpass...
  
• Bass Booster
  
• Biquad C code
  
• Butterworth Optimized C++ Class
  
• C++ class implementation of RBJ Filters
  
• C-Weighed Filter
  
• Cascaded resonant lp/hp filter
  
• Cool Sounding Lowpass With Decibel Measured Resonance
  
• DC filter
  
• Delphi Class implementation of the RBJ filters
  
• Digital RIAA equalization filter coefficients
  
• Direct form II
  
• Fast Downsampling With Antialiasing
  
• Formant filter
  
• frequency warped FIR lattice
  
• Hilbert Filter Coefficient Calculation
  
• Hiqh quality /2 decimators
  
• Karlsen
  
• Karlsen Fast Ladder
  
• Lowpass filter for parameter edge filtering
  
• LP and HP filter
  
• LPF 24dB/Oct
  
• Moog Filter
  
• Moog VCF
  
• Moog VCF, variation 1
  
• Moog VCF, variation 2
  
• Notch filter
  
• One pole filter, LP and HP
  
• One pole LP and HP
  
• One pole, one zero LP/HP
  
• One zero, LP/HP
  
• Peak/Notch filter
  
• Perfect LP4 filter
  
• Phase equalization
  
• Pink noise filter
  
• Plot Filter (Analyze filter characteristics)
  
• Plotting R B-J Equalisers in Excel
  
• Polyphase Filters
  
• Polyphase Filters (Delphi)
  
• Poor Man's FIWIZ
  
• Prewarping
  
• RBJ Audio-EQ-Cookbook
  
• RBJ Audio-EQ-Cookbook
  
• Remez Exchange Algorithm (Parks/McClellan)
  
• Remez Remez (Parks/McClellan)
  
• Resonant filter
  
• Resonant IIR lowpass (12dB/oct)
  
• Resonant low pass filter
  
• Reverb Filter Generator
  
• State variable
  
• State Variable Filter (Chamberlin version)
  
• State Variable Filter (Double Sampled, Stable)
  
• Stilson's Moog filter code
  
• Time domain convolution with O(n^log2(3))
  
• Time domain convolution with O(n^log2(3))
  
• Type : LPF 24dB/Oct
  
• Various Biquad filters
  
• Windowed Sinc FIR Generator
  
• Zoelzer biquad filters
  

Other

• VST SDK GUI Switch without
  
• 16-Point Fast Integer Sinc Interpolator.
  
• 16-to-8-bit first-order dither
  
• 3rd order Spline interpollation
  
• 5-point spline interpollation
  
• Allocating aligned memory
  
• Antialiased Lines
  
• Automatic PDC system
  
• Base-2 exp
  
• Bit-Reversed Counting
  
• Block/Loop Benchmarking
  
• Branchless Clipping
  
• Calculate notes (java)
  
• Center separation in a stereo mixdown
  
• Center separation in a stereo mixdown
  
• Cheap pseudo-sinusoidal lfo
  
• Clipping without branching
  
• Constant-time exponent of 2 detector
  
• Conversion and normalization of 16-bit sample to a floating point number
  
• Conversions on a PowerPC
  
• Copy-protection schemes
  
• Cubic interpollation
  
• Cure for malicious samples
  
• Denormal DOUBLE variables, macro
  
• Denormal numbers
  
• Denormal numbers, the meta-text
  
• Denormalization preventer
  
• Denormalization preventer
  
• Dither code
  
• Dithering
  
• Double to Int
  
• Envelope Follower
  
• Exponential parameter mapping
  
• fast abs/neg/sign for 32bit floats
  
• Fast binary log approximations
  
• Fast cube root, square root, and reciprocal for x86/SSE CPUs.
  
• fast exp() approximations
  
• Fast exp2 approximation
  
• Fast log2
  
• fast power and root estimates for 32bit floats
  
• Fast rounding functions in pascal
  
• Fast sign for 32 bit floats
  
• Float to int
  
• Float to int (more intel asm)
  
• Float to integer conversion
  
• Float-to-int, coverting an array of floats
  
• Gaussian dithering
  
• Gaussian random numbers
  
• Hermite Interpolator (x86 ASM)
  
• Hermite interpollation
  
• Linear interpolation
  
• Lock free fifo
  
• Matlab Time Domain Impulse Response Inverter/Divider
  
• MATLAB-Tools for SNDAN
  
• MIDI note/frequency conversion
  
• Millimeter to DB (faders...)
  
• Motorola 56300 Disassembler
  
• Noise Shaping Class
  
• Nonblocking multiprocessor/multithread algorithms in C++
  
• Piecewise quadratic approximate exponential function
  
• please add it as a comment to the Denormalization preventer entry (no comments are allowed now) thanks
  
• pow(x,4) approximation
  
• rational tanh approximation
  
• Reading the compressed WA! parts in gigasampler files
  
• Real basic DSP with Matlab (+ GUI) ...
  
• real value vs display value
  
• Really fast x86 floating point sin/cos
  
• Reasonably accurate/fastish tanh approximation
  
• resampling
  
• Saturation
  
• Sin(x) Aproximation (with SSE code)
  
• Sin, Cos, Tan approximation
  

Synthesis

• (Allmost) Ready-to-use oscillators
  
• Alias-free waveform generation with analog filtering
  
• AM Formantic Synthesis
  
• Another cheap sinusoidal LFO
  
• another LFO class
  
• antialiased square generator
  
• Arbitary shaped band-limited waveform generation (using oversampling and low-pass filtering)
  
• Audiable alias free waveform gen using width sine
  
• Bandlimited sawtooth synthesis
  
• Bandlimited waveform generation
  
• Bandlimited waveform generation with hard sync
  
• Bandlimited waveforms synopsis.
  
• Bandlimited waveforms...
  
• Butterworth
  
• C# Oscilator class
  
• C++ gaussian noise generation
  
• chebyshev waveshaper (using their recursive definition)
  
• Cubic polynomial envelopes
  
• Direct pink noise synthesis with auto-correlated generator
  
• Discrete Summation Formula (DSF)
  
• Drift generator
  
• DSF (super-set of BLIT)
  
• Easy noise generation
  
• Fast & small sine generation tutorial
  
• Fast Exponential Envelope Generator
  
• Fast LFO in Delphi...
  
• Fast sine and cosine calculation
  
• Fast sine wave calculation
  
• Fast square wave generator
  
• Fast Whitenoise Generator
  
• Gaussian White noise
  
• Gaussian White Noise
  
• Generator
  
• Inverted parabolic envelope
  
• matlab/octave code for minblep table generation
  
• PADsynth synthesys method
  
• Parabolic shaper
  
• Phase modulation Vs. Frequency modulation
  
• Phase modulation Vs. Frequency modulation II
  
• Pseudo-Random generator
  
• PulseQuad
  
• Pulsewidth modulation
  
• Quick & Dirty Sine
  
• quick and dirty sine generator
  
• RBJ Wavetable 101
  
• Rossler and Lorenz Oscillators
  
• SawSin
  
• Sine calculation
  
• Square Waves
  
• Trammell Pink Noise (C++ class)
  
• Waveform generator using MinBLEPS
  
• Wavetable Synthesis
  
• Weird synthesis