I need white noise as background music，but there is some jittered timing between different routine

[Michael]

One background music during a loop

You need to use some tiny code snippets here to do this, as all Builder stimuli are designed to start and stop within a routine, while you want one that will span multiple iterations over a routine. Insert a code component on the routine where the sound will play. In the "Begin experiment" tab, insert code something like this to create the sound object in advance: background_sound = sound.Sound('your_sound_file.wav') In the "Begin routine" tab, put something like this, so that the sound start…