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Cartridge port sound input
Posted: Mon Jul 09, 2018 8:04 pm
by bazza
I see that the cartridge has an entrance of sound, is possible to use it like entrance of DCPM or similar?
http://wiki.nesdev.com/w/index.php/Cartridge_connector
Re: Cartridge port sound input
Posted: Mon Jul 09, 2018 8:28 pm
by lidnariq
Only the Famicom and Famicom-like devices have the ability to mix in audio.
Other than the FDS, there were only a
few games that added expansion audio music, and another small handful that added dedicated speech playback ICs.
Re: Cartridge port sound input
Posted: Tue Jul 10, 2018 8:09 pm
by Memblers
On the NES, Nintendo expected audio to be mixed in on the expansion port. It's far too expensive to make the connector in a small quantity (other than labor intensively by hand, as Chkyn was doing), but at least for audio, INL has come up with an (IMO) brilliant idea for a jumper board that can just slot in and connect the audio pins. It's very inexpensive to build, can be as few as 4 parts if you used a fixed value for the mixing resistor. I'm still holding out hope that all NES systems' audio have roughly the same amplitude.
In other words, I think it's a good time to start talking about audio input on the NES. I've got a couple audio projects in the works.