Basically, I've come to the attention that some games tend to have some issues with their sound systems. For an example, I was playing Elevator Action, and the game's melody got to the point where it wouldn't play unless I was in an elevator (triggering the triangle wave), or shooting/getting shot at (triggering the noise channel). If I did nothing, the game would be otherwise silent. Another example is the Famicom game B-Wings, it seems like the game will randomly change the duty cycle of the square waves, depending on what happens. This won't happen all the time, but it can and will happen by chance. I'm assuming that the game's internal logic has interfered with the audio logic, thus throwing out the whole system.
Alternatively, there is one game, Alpha Mission (also known as A.S.O: Armored Scrum Object in Japan) where the introductury jingle will play at a different speed each time you boot it up. Sometimes it will play fast, other times it will play slow. And there's another game, Rainbow Islands, where the triangle wave with literally screech and halt in a certain song after some time. But that appears to be more of a programming error than it is game interference.
Is it common for the music in NES games to be thrown out of whack under certain conditions?
Alternatively, there is one game, Alpha Mission (also known as A.S.O: Armored Scrum Object in Japan) where the introductury jingle will play at a different speed each time you boot it up. Sometimes it will play fast, other times it will play slow. And there's another game, Rainbow Islands, where the triangle wave with literally screech and halt in a certain song after some time. But that appears to be more of a programming error than it is game interference.
Is it common for the music in NES games to be thrown out of whack under certain conditions?