Live audio only: Live audio is any sound captured from a real-world event and transmitted without delay to a webpage. There may be a short delay to allow some censoring, but not enough to allow for significant editing. Making live audio accessible will benefit people who have a hearing disability.
Live audio with video: Sound and moving images captured from real-world events. Making live audio with video accessible benefits all users.
Live video only: Moving sequence of pictures captured from a real-world event and transmitted with no more than a broadcast delay.
Pre-recorded audio only: Sound files recorded prior to presentation. Audio can include synthetic sounds, recording of real-world sounds and voice. Making audio accessible benefits people with hearing difficulties.