Audio API Suitable for multi channel playback in windows

I am researching a project in which I need to playback simultaneously a multi-track audio source. ( >30 mono channels ) The audio on all channels needs to start simultaneously and be sustained for hours of playback.

What is the best audio API to use for this? WDM and ASIO have come up in my searches. I will be using a MOTU PCI Audio 开发者_如何学JAVAinterface to get this many channels. The channels show up as normal audio channels in the host PC.

ASIO is definitely the way to go about this. It will keep everything in sync properly, with low latency, and is the defacto industry standard way to do it. Any pro audio interfaces supports ASIO, and for interfaces that don't, there is a wrapper that is capable of syncing multiple devices.