Flame X-4

what do the sliders control? the manual just says "sliders"
is it one slider for each input? if so, what 1 parameter does it change.
is it 4 sliders that control all 4 inputs... again, what 4 parameters would be controlled?

the sliders control an AR/AD curve. one for each channel. it goes from short attack/short decay via medium a/medium d to long a/no decay. serves as attenuator for cv. there's a graph in the manual: https://www.flame-instruments.de/pdf/Manual_Flame_X4_module_v100_eng.pdf