oscilloscope basics/tutorials

Hi guy and girls, wanted to learn how to use a oscilloscope to help out with audio electronic projects, so picked up a old 100MHz Dual beam oscilloscope and was wondering if anyone had come across good basics tutorials online?

They make you fill in some personal info but this guide from Tektronix has always been one of my favorites:


-- Beat707: MIDI drum machine / sequencer / groove-box for Arduino