Ultrasession in opensesame

The recommended way to acquire ultrasound data in the Phonology Lab is via an Opensesame experiment. You can use Opensesame to display a series of prompts to a subject and run and control the acquisition utilities in inline scripts. A simple experiment proceeds like this:

1. variables related to data acquisition are set
2. the ultrasound acquisition system is initialized
3. the experiment loops over a list of stimuli, which are used to prompt the subject
   1. a preparatory prompt is shown to the subject
   2. ultrasession.py is started and delays until the ultrasound system confirms that it is imaging
   3. a speaking prompt is shown to the subject. This prompt can be shown for a defined duration, or it can be displayed until the subject presses a key.
   4. ultrasession.py is sent a signal to stop acquisition

These steps are followed in the sample experiment available on github. See the test experiment provided in the latest release.