Hello Patrick,
assuming as Jon has suggested that you have different vlan-ids for data traffic and for voice traffic you can select out what uplink to send traffic of a certain vlan by different means:
first of all by having two distribution switches dis1 and dis2 and making dis1 the root bridge for voice vlan and dis2 the root bridge for data vlan a third access layer switch can send and receive traffic of type x over link 1 and traffic of type y over link 2.
L3 services like HSRP can be configured following the root bridge.
plese provide more information on your scenario to get better help
Hope to help
Giuseppe