MDS (Multiple Delta Sigma) and MMB (Multiple Multi-Bit) D/A conversion
The "multiple" means parallel DAC ICs. Accuphase employed this with (AFAIK) several PCM63's way back in 1991/1992:
In the late 1990s and into the 2000s, when DS DAC ICs began their ascent in popularity, Accuphase began to replace MMB with MDS:
(note that the topology is a bit different than paralleling multi-bit DACs, as in the first figure). From Accuphase product literature, I think the DS chip they use is from Analog Devices.
DIY fanboyz (and Chinese developers) of say a certain Philips TDA1387 8x (parallel) -- among other -- pieces-of-kit take have certainly made their case for MMB.
I'm not sure whether any other audio manuf. ever implemented MDS; or project junkie here on "the Do"?
Since "last year's" DS chips (PCM1792, etc.) are dirt cheap on eBay (etc.), MDS projects may be interesting.
The "multiple" means parallel DAC ICs. Accuphase employed this with (AFAIK) several PCM63's way back in 1991/1992:
In the late 1990s and into the 2000s, when DS DAC ICs began their ascent in popularity, Accuphase began to replace MMB with MDS:
DIY fanboyz (and Chinese developers) of say a certain Philips TDA1387 8x (parallel) -- among other -- pieces-of-kit take have certainly made their case for MMB.
I'm not sure whether any other audio manuf. ever implemented MDS; or project junkie here on "the Do"?
Since "last year's" DS chips (PCM1792, etc.) are dirt cheap on eBay (etc.), MDS projects may be interesting.
Last edited: