a7af33ba25
Created functions bandreject_filter(), fade_in(), and fade_out(). Should be in the standards asked, but if not please contact me
32 lines
970 B
Matlab
32 lines
970 B
Matlab
function output = fade_out(input, time)
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% Creates a fade-out sound effect that lasts a given
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% time parameter of the input sound signal
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% By Yalu Ouyang
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% input: a 1D array that represents the sound signal in the time domain
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% time: how long the fade out effect should last
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% Shouldn't be longer than the input signal
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% (in which case the function treats it as the duration of the signal)
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% Returns modified signal in the time domain (output).
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len = length(input);
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% if time parameter longer than signal, treat time as
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% the duration of original signal
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if time > len
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time = len
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end
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% set multiplier as 1D array
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multiplier = (1 : time) / time;
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% fade out effect: from full volume of signal to no volume
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multiplier = flip(multiplier)
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% the resulting fade-in output
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output = input .* multiplier;
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end
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% This is useful for creating videos, specifically the outro part |