Bigamp was wrong about jriver MC 12 having an ASIO driver builtin. It has code to interface to an ASIO driver.
A real ASIO driver talks to the actual soundcard hardware. You usually get that driver from the company that made your soundcard. If the manufacturer didn't write an ASIO driver for their soundcard, you probably will have to settle for ASIO4all.
The ASIO4all driver doesn't talk to actual H/W. It talks to the normal Windows driver at a lower level than the Waveout or DirectSound interfaces.
A real ASIO driver talks to the actual soundcard hardware. You usually get that driver from the company that made your soundcard. If the manufacturer didn't write an ASIO driver for their soundcard, you probably will have to settle for ASIO4all.
The ASIO4all driver doesn't talk to actual H/W. It talks to the normal Windows driver at a lower level than the Waveout or DirectSound interfaces.