Not an expert but I believe you will need to convert to freebase before making Changa. You will be smoking the crystals in changa so you would want the smokable form of the crystals (ie freebase).
The inner soul is full of joy. Reveal my secrets and sew me whole. With each day, "I" heeds your call.
You may not care the slightest and may not be the brightest, but from here "I" sees you're mighty for you created it all.
And the jumbling sea rose above the wall.
Through this chaos comes the order you enthrall.