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I own a copy of Virtual Audio Cable (VAC), which theoretically provides multiple virtual cables to route audio between applications on windows systems. I have been able to create 4 cables in VAC, and can use any two of them to route 2 stereo pairs from pd to Ableton. But it appears that pd will not output to more than two 2-channel outputs at once.

Anyone have guidance on routing as many as 4 stereo outputs from pd to Ableton on a windows pc?_

Hi
not sure about routing into ableton, but [dac~ 1 2 3 4] will give you, your 4 outputs

thanks Nk. I knew about using [dac~ 1 2 3 4] to tell pd to output to multiple channels, but I do not seem to be able to set up pd to us 4 stereo VAC cables for a total of 8 outputs on my Windows pc. My app is already working for someone on a mac, but they are using Soundflowr to connect pd to Ableton.