29 lines
809 B
Mathematica
29 lines
809 B
Mathematica
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function x = lfo_sine(amplitude, frequency, phase, fs, duration, input)
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% LFO_SINE: modulates an input matrix
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% CONTRIBUTORS:
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% Benjamin Liou: Original author
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% DOCUMENTATION:
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% frequency is typically below 20Hz (according to wikipedia)
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% fs and duration should be same as input
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% initialize local variables from input arguments
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n = fs * duration; % number of samples (length of matrix)
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dt = 1 / fs; % sampling period: time between two sample points
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% initialize lfo, which will be used to modulate the input
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lfo = zeros(1, n);
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% populate lfo matrix
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for i = 1:n
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t = i * dt; % time at the i'th sample
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lfo(i) = amplitude * sin(2 * pi * frequency * t - phase);
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end
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% modulate input
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x = lfo .* input;
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end
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