I think B00daW is referring to how the YM2149 has the 1/2 clock divider mode, which appears to be how the 5B is implemented, i.e. the envelopes should be double resolution vs if you were using an AY with an additional divider. Either way, though, if the squares are at the correct pitch, the envelopes will be too (only the resolution of the envelope would be different, very subtle distinction).
Quote:
I don't wish to cram extra electronics inside the Everdrive cartridge, as it's pretty packed and I don't want to break it.
It always amazes me when people consider a hardware solution easier than just writing some code. To me, any kind of hardware modification is a huuuge step to take compared to most software solutions. I would have spent the time just writing the sound emulation in verilog to run on the Everdrive as-is.
(Also, if you do it in software, you can give it to other people a lot more easily too.)