MIDI Callback - How to access to the Metadata table ?

[Badsheep]

Hello,

I do a MIDI Callback like this :

function ReceivedMidi(object, deviceName, commandType, description, metadata)

  print("object: " .. tostring(object))
  print("deviceName: " .. deviceName)
  print("commandType: " .. commandType)
  print("description: " .. description)
  print("metadata: " .. hs.inspect(metadata))

    hs.alert.show(metadata[2])
end

fromMax:callback(ReceivedMidi)

Everything seems to work fine, the console displays :

2023-02-13 14:59:32: object: hs.midi: from Max 1 (0x606000069958)
2023-02-13 14:59:32: deviceName: from Max 1
2023-02-13 14:59:32: commandType: controlChange
2023-02-13 14:59:32: description: <MIKMIDIControlChangeCommand: 0x604000b7eed0> time: 14:59:32.566 command: 191 channel 0 control number: 4 value: 127 14-bit? 0
data: {length = 3, bytes = 0xb0047f}
2023-02-13 14:59:32: metadata: {
channel = 0,
controllerNumber = 4,
controllerValue = 127,
data = "b0047f",
fourteenBitCommand = false,
fourteenBitValue = 16256,
isVirtual = true,
timestamp = "14:59:32.566"
}

But still I don't know how to access to the values stored in "metadata"...

I tried
hs.alert.show(metadata[2])
and
hs.alert.show(metadata[controllerNumber])

I always get nil.

But when the hs.inspect from above works. ??
I don't understand why I can't get datas from this table...
Thanks for your help !

[Badsheep]

I found the answer in a script on the web... The correct way to do it is :

hs.alert.show(metadata["controllerNumber"])

Sorry this thread was useless, problem solved.

[latenitefilms]

You can also do metadata.controllerNumber