Midi Trigger 8-way to drive a sampler or a device noon with a pedal or a dry contact

In my config trigger a sampler S950 driver for shipments of sounds automatically. The trigger is controlled by relay boxes, driven by PC, but it is not normal use. The security system is doubled (live on TV set)

UTILIZATION

No driver is the program midi velocity + ... and that's it

The trigger is installed in my master not therefore necessarily a problem

OVERALL OPINION

A little used on TV shows (only during filming)

The simplest reliable and efficient
Least 8 channels only

Q / P OK

For an 8-channel config for which I resigned enough eyes closed