Added README

README.md

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+# VRC7-Sound
+
+Emulator for the expansion sound of the Konami VRC7.
+
+## About
+
+VRC7-Sound is an open-source emulator for the Konami VRC7's expansion sound, featured in the Famicom game *Lagrange Point*.
+The VRC7 enables FM-style music through the use of a modified Yamaha YM2413 (OPLL) architecture, which is itself based on the
+YM3812, a chip prominently used in the AdLib and Sound Blaster soundcards. The emulator attempts to accurately recreate this sound
+by relying mostly on information gathered from the VRC7's die shot.
+
+## Usage
+
+To use VRC7-Sound, simply embed the source files into your C/C++ project. No additional libraries are required. Detailed 
+description of how to use the emulator and it's specific functions are given in the header file (vrc7_sound.h).
+
+## Contact
+Questions? Feedback? Bugs? Let me know:
+
+Jonas Rinke (Delphi1024)  
+delphi1024 (аt) gmail (dоt) com
+
+## References
+* VRC7 die shot by digshadow:
+  * https://siliconpr0n.org/archive/doku.php?id=digshadow:konami:vrc_vii_053982
+
+* YM2413 (OPLL) Datasheet:
+  * http://www.smspower.org/maxim/Documents/YM2413ApplicationManual
+
+* VRC7 audio on Nesdev Wiki:
+  * https://wiki.nesdev.com/w/index.php/VRC7_audio
+
+* OPLx logSin/exp/ksl tables by Olli Niemitalo and Matthew Gambrell:
+  * http://yehar.com/blog/?p=665
+  * https://docs.google.com/document/d/18IGx18NQY_Q1PJVZ-bHywao9bhsDoAqoIn1rIm42nwo/edit
+
+* Instrument ROM Dump by NukeYKT:
+  * https://siliconpr0n.org/archive/doku.php?id=vendor:yamaha:opl2#ym2413_instruments
+
+* Lagrange point filter analysis by kevtris:
+  * http://forums.nesdev.com/viewtopic.php?t=4709&p=41523

demo/README.md

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 # Demo Recordings
 
-These recordings were made using [NSFPlay 2.4] (https://github.com/bbbradsmith/nsfplay), by modifying nes_vrc7.cpp and nes_vrc7.h
+These recordings were made using [NSFPlay 2.4](https://github.com/bbbradsmith/nsfplay), by modifying nes_vrc7.cpp and nes_vrc7.h
 to use the VRC7-Sound emulator. Apart from the fade out, no modifications were done to the recordings.