thanks a lot for your very useful supplement. Since I have always used the Actor OSC Multi Listener, I had not paid any attention to the fact that when renumbering the ports, Isadora jumped for e.g. from 4 to 6 when there were two values at 4.

Thanks again

@jfg has shown you perhaps the more efficient way of grabbing this pair of values, but for clarity, I want to add that you can also grab these values (as shown in JFG's image slice of the stream setup window) on Channel 5 AND 6 using two OSC Listeners. 

This is because OSC allows some values to be sent in bundles. In Isadora's stream setup window, this can be seen as a list of comma-separated values shown to the right side of the channel assignment row (again seen as (0.56, 0.6216) in the image JFG provided). The first values (in this case your x value) will be available on channel 5 (whichever is assigned to this address) the following values (y in this case) will be available in the following channel/s.. channel 6 in this case. If you were passing XYZ data it might use channels 5, 6, and 7.

Ah! turns out I had assigned each of the dials to a different channel (without gaps) which didn't provide space for the second value to come through. Thanks!

have you tried with "OSC Multi Listener"? You get the two values in different outputs. Here the values from a XY Pad:

best, Jean-François