Sure! This is what i ended up with.
This is allready with more or less correct labels for each slider. 
ardour {
["type"] = "dsp",
name = "MIDI CC Generator",
category = "Utility",
license = "GNU/GPL v3",
author = "Jean-Emmanuel Doucet",
description = [[MIDI CC Generator - Exposes all CC as faders and inline controls]]
}
local state = {}
local params = {}
-- expose all 128 CCs
--for i = 1, 128 do
-- params[i] = { ["type"] = "input", cc = i - 1, name = "CC" .. (i - 1), doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
--end
-- or comment above loop and manually define which CCs should be exposed:
params[2] = { ["type"] = "input", cc = 102, name = "Attack", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[3] = { ["type"] = "input", cc = 103, name = "Deacay", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[4] = { ["type"] = "input", cc = 104, name = "Sustain", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[5] = { ["type"] = "input", cc = 105, name = "Release", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[6] = { ["type"] = "input", cc = 10, name = "Pan", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[7] = { ["type"] = "input", cc = 7, name = "Volume", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[8] = { ["type"] = "input", cc = 106, name = "Mod1", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[9] = { ["type"] = "input", cc = 107, name = "Mod2", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
params[10] = { ["type"] = "input", cc = 123, name = "Panic", doc="Set to -1 to bypass", min = -1, max = 127, default = -1, integer = true }
-- Add Program Change parameter
params[1] = { ["type"] = "input", name = "Program Change", doc="Set to -1 to bypass, 0-127 for program change", min = -1, max = 20, default = -1, integer = true }
for i = 1, #params do
state[i] = -1
end
function dsp_ioconfig ()
return { { midi_in = 1, midi_out = 1, audio_in = 0, audio_out = 0}, }
end
function dsp_params ()
return params
end
function dsp_run (_, _, n_samples)
assert (type(midiin) == "table")
assert (type(midiout) == "table")
local ctrl = CtrlPorts:array ()
local m = 1
-- handle Program Change separately
local pc_param_index = 1 -- index of our Program Change parameter
if ctrl[pc_param_index] ~= -1 and ctrl[pc_param_index] ~= state[pc_param_index] then
local pc_value = math.floor(ctrl[pc_param_index] + 0.5)
midiout[m] = {}
midiout[m]["time"] = 1
midiout[m]["data"] = { 0xC0, pc_value } -- 0xC0 is Program Change status byte
m = m + 1
state[pc_param_index] = pc_value
end
-- inject midi cc (skip the Program Change parameter)
for i, param in ipairs(params) do
if i ~= pc_param_index then
-- only send once per cycle if value has changed
if ctrl[i] == -1 then
-- reset cc to zero when sliding to -1 quickly
if state[i] > 0 then
midiout[m] = {}
midiout[m]["time"] = 1
midiout[m]["data"] = { 0xb0, param["cc"], 0 }
m = m + 1
end
state[i] = -1
else
-- round cc value in case of automation
local rctrl = math.floor(ctrl[i] + 0.5)
if rctrl ~= state[i] then
midiout[m] = {}
midiout[m]["time"] = 1
midiout[m]["data"] = { 0xb0, param["cc"], rctrl }
m = m + 1
state[i] = rctrl
end
end
end
end
-- forward incoming midi
-- From MIDI LFO @ Ardour Team
local i = 1
for ts = 1, n_samples do
if i <= #midiin then
while midiin[i]["time"] == ts do
midiout[m] = midiin[i]
i = i + 1
m = m + 1
if i > #midiin then break end
end
end
end
end
