I have an idea that the fader start function on the Pioneer DJM 909
(usually used with a control cord and various Pioneer CDJs),
could be used to remote start the Vestax PDX2000 turntables.?
The PDX2000 have a remote start jack input which is the same size (8thinch-Headphone jack) as the fader start output jack on the Pioneer DJM 909.?
The PDX2000's manual states that this remote jack can be used with a footswitch to remotely switch the start/stop function of the turntable.? However that is all the manual says, it is pretty light on info about what sort of control message the footswitch outputs.
Since the jacks are the same size and the start/stop message pretty similar I think the Pioneer could possibly send a start/stop message to the PDX2000 with the fader start function on.
It will work, but depends on one thing. If it needs a make or brake contact. You can find this in the documentation or by looking at the schema's in your documentation. But like Luxx said, you could just try it out. It is safe to try.