Lameboy is an example of a great project.
The author of this emulator has done an awesome job handling this.
What I particularly like about Lameboy is that, it did not get too ambitious at any stage of the production. Rather, Lameboy adopted all the graphical and gaming parts correct, then it got onto implementing sound features. Other projects have gone into sound features without solidly completing graphical sides, causing less completeness in some areas in the emulators.
Congratulations to the author of Lameboy, and I highly admire the quality effort put into this. The sound is amazing, and I hope that the next release will solidify the sound features even further!