get/set sample gain and pitch tables

[d.healey]

I'm using a custom sample mapper script and it would be very useful for me to be able to get and set the sample gain and pitch tables from within the script. I had a look at the source myself and can see that the IDs aren't set, so I set them, but this doesn't work as I expected, I think the get function isn't returning the table data correctly but I'm not sure.