qb wrote:Chiptune makes more sense as a term since it simply means music made using sound chips from old computers\consoles.
Amiga computers were still pretty new by the time "chiptune" started being used to describe some music that was made with them. I don't think that a reasonable definition would take relative age into consideration.
qb wrote:So to answer the topic question, no. You're not making authentic chip music if you make your own samples
Coincidentally, that is how "chiptune" sounds are traditionally made.
Those first Amiga chiptune composers were simply trying to *emulate* the sound of the C64. I don't think it should matter that the term "chiptune" was coined in the late '90s.
On some platforms you can do that but you still have to play the samples on a dedicated sound chip, which is really where the definition comes from (i.e. music played on a chip). You also have basic sounds\waveforms that you can start from which are built into the chip. The Paula chip on the Amiga doesn't have any basic sounds built into it. It plays whatever samples you have.