Hardware/emulator quirks

I'm a bit two years late on this, but here you go:



It may not be the best comparison out there, but hey, at least it works.

Also, this is my 100th post overall. Took me four years to reach this!

 

Here's a funny thing I noticed while doing some audio recording tests for someone. I dunno if this applies to any other setup, but with my Sega Genesis USA NTSC VA3 and model 2 USA Sega CD, if I route the audio to be output from the MCD instead of the MD's AV out or headphone jack, then the audio's polarity will be inverted!



And yes, I did make sure that the MD's AV out and headphone jack output the same polarity, just to rule it out.

Spoiler

 

Okay, so this is interesting. So, audio coming out of a model 1 MCD (thanks Chibisteven for the recording) is the same as if you output through a model 1 MD. But, output from a model 2 MCD or its audio going through a model 2 MD results in an inverted polarity.

I also tested the polarity between a model 1 and 2 MD for non-MCD audio, and the polarity is the same.



And then, I did some further testing, and here's what I found from my end:




MD1 AV Out: FM normal, CD normal
MD1 Headphone Out: FM normal, CD normal
MD1 -> MCD2 Out: FM inverted, CD inverted
MD2 Out: FM normal, CD inverted
MD2 -> MCD2 Out: FM normal, CD inverted

Unfortunately, I don't have a model 1 MCD of my own to test even further, but judging from the one test from Chibisteven, MCD1 out doesn't perform any inversion, at least on the CD audio.