Make a GameBoy mode

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Joined: Thu Sep 01, 2016 8:43 pm

Re: Make a GameBoy mode

Postby TheJuanCarlos64 » Wed Mar 29, 2017 8:47 pm

ZeroJanitor wrote:those are dead links now

Ok There we go! ...
Sorry for the Old Username :/

Posts: 17
Joined: Thu Jun 25, 2015 4:20 am

Re: Make a GameBoy mode

Postby Dwedit » Sun Apr 02, 2017 7:19 pm

Gameboy can't change square wave volume without resetting the phase of the wave (clicks and metallic buzzing). It can do it in a limited way with volume envelopes though, it can strictly decrease or increase volume at a regular rate with no buzz artifact.
It's a different beast entirely.

So your GB volume envelopes would need to be either increasing/decreasing by 1, and it could take up to 7 frames to go up or down by 1, but must be a regular interval. So you could do an envelope like 10 11 12 13 14 15 15 15, or 10 10 11 11 12 12 13 13, or 8 8 8 7 7 7 6 6 6 5 5 5, but if the envelope does not fit that form, you do a phase restart (pop/buzz) to proceed to the next part of the envelope.

Also it's not truly frames as the time unit, but 1/64th seconds, similar enough.

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