Table Of Contents

Previous topic

psychopy.serial - functions for interacting with the serial port

Next topic - miscellaneous tools

This Page

Quick links

psychopy.sound - play various forms of sound


PsychoPy currently supports a choice of three sound libraries: pyo, sounddevice or pygame. Select which will be used via the audioLib preference. sound.Sound() will then refer to one of SoundDevice SoundPyo or SoundPygame. This can be set on a per-experiment basis by importing preferences, and setting the audioLib option to use.

  • The pygame backend is the oldest and should always work without errors, but has the least good performance. Use it if latencies foryour audio don’t mattter.
  • The pyo library is, in theory, the highest performer, but in practice it has ften had issues (at least on macOS) with crashes and freezing of experiments, or causing them not to finish properly. If those issues aren’t affecting your studies then this could be the one for you.
  • The sounddevice library looks like the way of the future. The performance appears to be good (although this might be less so in cases where you have complex rendering being done as well because it operates from the same computer core as the main experiment code). It’s newer than pyo and so more prone to bugs and we haven’t yet added microphone support to record your participants.

alias of SoundPygame