Environment Variables¶
Certain aspects of the o_ptb
can be preconfigured by setting so-called environment
variables. On Windows, you can set these in the System Settings. On Mac and Linux you
do this in the /etc/environment, bashrc, zshrc or .pam_environment file.
General Configuration¶
- O_PTB_PTB_FOLDER¶
The location of the Psychtoolbox.
- O_PTB_USE_DECORATED_WINDOW¶
Use decorated windows for the PTB screen when not run in fullscreen mode.
- O_PTB_IS_LAB_PC¶
You should set this variable to
true
on a Stimulation PC in a lab. This will lead so a warning if an experiment is run in debug mode.
- O_PTB_AUDIO_CUTOFF¶
The audio cutoff frequency. Useful for the tube stimulation systems.
Sound Configuration¶
- O_PTB_PSYCHPORTAUDIO_DEVICE¶
The PortAudio device number to use.
- O_PTB_PSYCHPORTAUDIO_SFREQ¶
The sampling frequency of the device when using PortAudio.