According to my understanding of the Famicom's audio path, some cartridges can mix their on-cartridge sound with the Famicom's standard audio. It accepts the Famicom's audio output on pin #45, mixes it with with the cartridge based sound inside the cartridge, and ouputs the result on pin #46, which goes directly to the RF modulator or A/V outputs. However, that probably is not necessary, so the two pins remain connected and the extra sound is outputted along with the NES audio on pin $46,
Of the special sound chips, MMC5, FME-7, VRCVI, VRCVII, Namco 106 and the Famicom Disk System, which chip uses which method?
Of the special sound chips, MMC5, FME-7, VRCVI, VRCVII, Namco 106 and the Famicom Disk System, which chip uses which method?