"Invalid order function for sorting" error when attempting to prevent songs from repeating

[crumbsinmytoes (sunny)]

Hello. I am trying to create a music player that does not repeat songs in a row. When using math.random, a song ended up playing 5 times in a row, which is not what I want. I want a music player that will not repeat songs.

I used this post as reference for my script

Audio repeating itself instead of using another Audio

So, I’m trying to have a permanent audio player that switches to another soundid after the currently played one finished, but the thing is, it doesn’t switch, it just repeats the last played soundid. The Script is placed inside Music, which is in Workspace [Music - Roblox Studio 03.02.2020 19_34_37] The Script looks like this: local Themes = {733298638, 2533140135, 475011760, 721477744, 705342826, 706837670, 516104812, 705334495, 705326459, 2441582257, 1571892231} local MaxVolume = .25 whi…

However when I used the solution in the post, I got the same error as shown in the title, so I attempted to edit it, yet I still get the same error.

I don’t know what went wrong?

Here is my code:

math.randomseed(tick()) 

local AvailableMusic = {9043591515,9043592895,1842259478,1836891661,1841984324,1848354536,1843041874,9040291273,1838834495,1838091800}

while (#AvailableMusic > 0) do
	print("shuffling playlist...")
	table.sort(AvailableMusic, function()
		return Random.new():NextNumber() < 0.5
	end)
	for track, song in ipairs(AvailableMusic) do
		script.Parent.SoundId = "rbxassetid://"..song
		script.Parent:Play()
		script.Parent.Ended:Wait()
		wait(2)
	end
	print("end of playlist reached.")
end

[zilibobi (Checkmate)]

I’ve solved a similar post before. You can probably get the desired result by using my code as a reference.

How to make random music playing but it doesn't play the same music

I don’t have time to explain how this works, but here’s a music system from my game, I call it ‘random feed system’. There are over 60 tracks in my game, but even with 20 tracks, it’d still feel like there’s a lot more. If you understand programming, you should be able to implement a system like this in your game. P.S. each sound in the sounds folder should have a unique name. math.randomseed(tick()) local ReplicatedStorage = game:GetService("ReplicatedStorage") local spring = require(scri…

Regarding the reason your code is not working, I think it’s because you randomly return the true and false values on this line:

@crumbsinmytoes

return Random.new():NextNumber() < 0.5

I recommend you use my way of randomly selecting songs without choosing the same one in a row.

[crumbsinmytoes (sunny)]

I tried out your solution, and it seems to work at first however it only plays one song. It does not play the next song. I’m not sure if I may have missed something or not, please let me know. Here is my code:

math.randomseed(tick())

local ReplicatedStorage = game:GetService("ReplicatedStorage")

local audios = game.ReplicatedStorage.Music:GetChildren()

local feed = {}

local function getAudio()
	return audios[math.random(1, #audios)]
end

while true do
	local current = getAudio()
	
	if table.find(feed, current.Name) then
		repeat current = getAudio() task.wait() until not table.find(feed, current.Name)
	end

	table.insert(feed, current.Name)

	if #feed > math.floor(#audios/2) then
		table.remove(feed, 1)
	end
	
	current:Play()

	current.Ended:Wait()
end

[zilibobi (Checkmate)]

I can’t tell what’s the issue, so you have to add some print functions to see where’s the problem.

Btw, you can replace line current.Ended:Wait() with

task.wait(3)
current:Stop()

to not wait for the song to end.

math.randomseed(tick())

local ReplicatedStorage = game:GetService("ReplicatedStorage")

local audios = game.ReplicatedStorage.Music:GetChildren()

local feed = {}

local function getAudio()
	return audios[math.random(1, #audios)]
end

while true do
	print("current feed:", feed)
	local current = getAudio()
	print("\nselected song:", current)
	
	if table.find(feed, current.Name) then
		repeat current = getAudio() task.wait() print("song already played") until not table.find(feed, current.Name)
	end

	print("adding song to the feed")
	table.insert(feed, current.Name)

	if #feed > math.floor(#audios/2) then
		table.remove(feed, 1)
	end
	
	current:Play()

	print("the song is playing, waiting")
	current.Ended:Wait()
	print("the song has stopped playing")
end

@crumbsinmytoes, looking at your code, I think that the issue is somewhere outside the script. Although, that may not be true.

[crumbsinmytoes (sunny)]

So I ended up creating a fresh game, just a blank baseplate, since you said the issue may be outside the script. I moved the music folder and the script that you gave me into the blank game and the same issue is still happening. Plays one song, then doesn’t play the next. I don’t understand why it is not working, because it did print saying the next song was playing however I could not hear it.

Muzak Maker is the second song that should have been playing, yet I could not hear it.

[zilibobi (Checkmate)]

It works just fine for me.

Here’s my place file:
music.rbxl (43.2 KB)

As I mentioned here, it’s probably something outside the script.

@zilibobi

@crumbsinmytoes, looking at your code, I think that the issue is somewhere outside the script. Although, that may not be true.

[crumbsinmytoes (sunny)]

Huh, weird that it didn’t work for me. I used your rblx and switched your songs out with my songs and it works perfectly. Thank you so much! Sorry for the trouble.

[azqjanna]

See my post about random unique selections in general: How to select N random items from a list (Example)