Dark, i am thinking about the terraonion support of neogeo cd audio in mono for their products. correct me if i am wrong and forgive me if i cannot write a good sentence, but i think that they achieved that using ADPCM but it is mono (like every noise factory games with sample music) via their sd cart. I am asking from me and myself about adding stereo neogeocd sound adding to neosd cartridge a stereo jack (like the first megadrive) or stereo rca connectors and forcing neogeocd audio stream to go directly to those jacks and have 2 separate audio streams, one for the audio effect and the other for stereo cd sound. What do you think?