The Music Disk for Mockingboard and Cricket!

Introduction
============
This is the Music Disk by Walt Marcinko Jr.  It uses the Electric Duet (ED) music player by Paul Lutus and includes some classical music pieces and other popular tunes.

About the Mockingboard and Cricket Version
==========================================
The Electric Duet is probably the most popular music format in the Apple II world.
Unfortunately the sound quality of the internal speaker of the Apple II does not do much justice to the song pieces written with ED. On certain Apple II models like the //c the sound circuitry does not cut off the modulation frequency very well producing a high pitched background noise.
This motivated me to write my own routines to play ED songs using a sound card to produce pure tones with much higher quality. I chose the Cricket! because I own one and there is not much software compatible with it. The Mockingboard ED Player was developed on an emulator but seems to sound just as well. 
I wanted to keep the player as small as the original one so that it could be handled the same way. This limited a bit the amount of code that I could use, so even though the Cricket! version is able to play in stereo, the Mockingboard version is not.


Credits
=======
Paul Lutus    - original Electric Duet music player
Walt Marcinko - ED Tunes and menu system
Mario Patino  - The Cricket! and Mockingboard ED player