Be careful please! Entries are scheduled using in Coordinated Universal Time (UTC) but may be displayed in your local time zone. Look at individual calendar entries to be certain – downloading events to your calendar is helpful. To check, here is a time zone calculator.
Tutorial #5, X3D4 Sound and Audio
November 11 @ 7:00 PM - 8:00 PM UTC
Please see Extending X3D Realism with Audio Graphs, Acoustic Properties and 3D Spatial Sound for more information.
Did you check the time zone? We hope to see you there!