[LAU] specimen midi cc / simple lv2 sampler?

Hi list! Just wondering if anyone here has had any success or experience controlling specimen (say the volume and pan sliders for example) via MIDI cc as I've not been able to find any documentation on this aspect of the app. What controller numbers control what? Is it possible to set the controller numbers for different parameters without adjusting the source and recompiling? I realise linuxsampler supports lv2 but most of the time I don't need the luxury of gigasampler files (I don't have any- yet) and to be honest I'd prefer something more like specimen but as an LV2 plugin. Is anyone already working on such an app? Thanks! Dan