You've probably used Ping Pong Delay before, but have you ever looked under the hood? Right-click on Ping Pong Delay and you can change the transition mode, which affects the behavior of the device when the delay time is changed. Using Repitch mode, you get similar sounds to vintage tape/analog delay units. Dubspot instructor and Ableton Certified Trainer Thavius Beck demonstrates how to set up and use this effect in a new tutorial video: 

This video is part of a new tutorial series from Thavius, called "Did You Know?" Look out for more interesting - and often overlooked - tips to come.