Random presentation of signals

Hi, I have 222 codes for auditory signals and I want to present them in random order with 1 min interval,

can any one help me please?

Answer 1

[Walter Roberson]

I recommend that you investigate http://psychtoolbox.org/

http://psychtoolbox.org/docs/BasicSoundScheduleDemo

[Parisa]

I looked but I couldn't find my answer

[Walter Roberson]

https://raw.githubusercontent.com/Psychtoolbox-3/Psychtoolbox-3/beta/Psychtoolbox/PsychDemos/BasicSoundScheduleDemo.m

% This demo shows two things:
%
% - How to use audio schedules in PsychPortAudio to preprogram a sequence
% of different sounds to play and how to dynamically add new sounds to the
% schedule while it is playing. This is similar to "playlists" in typical
% audio player applications like iTunes or the iPod etc.
%
% - How to create and use many prefilled audio buffers before start of a
% session. This way you can preload all needed sounds before start of an
% experiment into memory, in a format optimized for fast playback and low
% memory usage. This is similar to the concept of textures or offscreen
% windows in the domain of Screen() for the visuals.

So you start off by loading the 222 signals into audio buffers using PsychPortAudio('CreateBuffer'...)

Pad each buffer out to 1 minute as you do that.

Add them to a schedule in a random order. You can randperm() to get a random order.

Start playing the schedule.

Come back 3 1/2 hours later.

[Parisa]

thank you very much for your time and help