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bbbradsmith / nsfplay

Nintendo NES sound file NSF music player
https://bbbradsmith.github.io/nsfplay/
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Add half-linear mixer on APU1? #57

Closed Yave-Yu closed 3 years ago

Yave-Yu commented 3 years ago

Half-Linear sounds like real NES(Famicom) and Nestopia's effect (when two 75% square wave plays).

bbbradsmith commented 3 years ago

I would need an explanation of what this means.

Can you take a recording of a real NES or Famicom that demonstrates it?

Yave-Yu commented 3 years ago

Two loud 75% square wave plays~ Example.zip 0: Linear, sounds clear. 1: "Half-Linear", sounds a little blurry but still clear. 2: Non-Linear, sounds blurry.

Example1's effect sounds like between Linear and Non-Linear, so I call it "Half-Linear" (I don't know how exactly call it). Very shame (on emulation) only Nestopia has it, so I hope you can implement this into NSFPlay.

bbbradsmith commented 3 years ago

I don't see an option for this in Nestopia.

What is the actual effect that is being described here?

Yave-Yu commented 3 years ago

Yeah, Nestopia didn't give any audio mixer option, it has native effect like Example1. I'm using earphone to hear, so they are result:

0: Linear, sounds clear. 1: "Half-Linear", sounds a little blurry but still clear. 2: Non-Linear, sounds blurry.

However I don't know how to exactly and accuracy describe it...

bbbradsmith commented 3 years ago

Well, I don't have anything I can act on here then. I will close this pending further information.

NSFPlay already has an option for linear (inaccurate) and non-linear (more accurate to NES) mixing of both APU channels.

If that's not what you are looking for then you will have to come back with information on an algorithm, or at least a recording of an NSF example from a real NES or Famicom (not an emiulator) that you can demonstrate is different from NSFPlay.