XLR Male to 1/4 Inch Male Stereo Adapter
This is the adapter you want to use if your device has a balanced 1/4" phone output that you want to connect to a mic input of a mixer through a snake or mic cable.  The TC Helicon Voiceworks has balanced outputs but they are not XLRs so you need these adapters to connect using a standard mic cable. 

Note that you only want to use this if the device output is balanced. If the output isn't balanced or you're not sure, you should probably use a direct box or 1/4" to XLR transformer adapter. The transformer in the connector makes the signal balanced for you.