Subliminal Auditory Priming

This repo contains code to generate auditory masked stimuli, as used on BBC's Why are we conscious of so little?

For more details, see eointravers.com/post/why-factor/.

Steps

To generate the stimuli, I

• Convinced friends and colleagues to lend me their voices: a woman to say "left" and "right" (targets), and a man to say those words plus some fillers (primes and masks).
• Manually edited the recordings in audacity so that all of the targets, and all of the primes and masks, were the same length. This can be done by slightly speeding up or slowing down segments, or by cutting out windows from the audio to shorten vowel sounds.
• Wrote a python script, using Pydub and FFmpeg (called using the ffmpy wrapper), to
  • Compress the primes and masks
  • Reverse the masks
  • Combine the primes, masks, and targets to produce the audio stimuli.