How can i add echo to a signal

13 vues (au cours des 30 derniers jours)
Ijeoma Madu
Ijeoma Madu le 1 Déc 2012
I want to add echo to a signal
load handel
how do i add echo to this
  3 commentaires
Ijeoma Madu
Ijeoma Madu le 9 Déc 2012
echo
Henry  Solderless
Henry Solderless le 30 Nov 2018
also if you want you can define the vector (1:size)

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Réponses (3)

Vieniava
Vieniava le 1 Déc 2012
load handel;
echo_delay = 0.5; % in seconds
echo_delay_s = round(echo_delay*Fs); % delay in samples
echo_gain = 0.1; % to control a linear gain of an echo
y_echoed = y + [zeros(echo_delay_s-1, 1); y(echo_delay_s:end)];
  3 commentaires
Perturabo
Perturabo le 8 Fév 2019
I have to make an echo generator too but the instructions say nothing about the phase difference; Just input, Fs,delay and gain. When i test it on various inputs it just says
Variable output must be of size [10820 1]. It is currently of size [73113 1]. Check where the variable is assigned a value
When using the above function.
Priyamvada Shankar
Priyamvada Shankar le 24 Mar 2019
@Perturabo please tell me, if you get the correct code.. I'm too stuck in this situation..so please help

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Vieniava
Vieniava le 2 Déc 2012
Modifié(e) : Vieniava le 2 Déc 2012
For example: to add an echo after 1s (with amplitude=0.1, phase=pi/3.5) and echo after 1.5 seconds (with a=0.5 and phase=1.2*pi) you can use the following code:
echo_vector=[1 zeros(1,Fs) ...
0.1*exp(1i*pi/3.5) zeros(1,1.5*Fs) ...
0.5*exp(1i*1.2*pi) ];
yecho=real(conv(y,echo_vector);
Using echo_vector that way you have full control of an echo creation.

Julia Esposito
Julia Esposito le 30 Nov 2017
How can I load an audio file and use a GUI to make it echo?

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