pick a sub-table from a main table then get info from the subtable?

I am trying to get a random sub-table from the main table, then get it's info. Can anyone explain what I'm doing wrong here?

 local songDatabase = {

['Light In Us All'] = {

audioId = 1513373015,

audioAuthor = 'You, Me & Gravity Album'

},

['Theories of an Eager Heart'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Breakfast of Champignons'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['With Friendship & Peace'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Small Hands Make Big Things'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Dream. Build. Repeat.'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Aspect Imaginarium'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Clever Candles Steal the Light'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Sink Cat'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['You\'ll Know When It Turns Invisible'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Theme Parks After Dark'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Things to Consider During Freefall'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['You, Me & Gravity'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Pride of Pimlico'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['Heisenberg\'s Entryway to Matrix Mechanics'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

['And so We See the Truth & the Beauty'] = {

audioId = 0,

audioAuthor = 'You, Me & Gravity Album'

},

}

  

local function pickSong()

local pickedSubTable= songDatabase[math.random(1,#songDatabase)]

local audioId = pickedSubTable.audioId

local audioAuthor = pickedSubTable.audioAuthor

end

wait(2)
pickSong()