array problem

[mrvr]

Hello!
I have made a playlist of songs, which in fact is an array, and I am trying to play the songs by using a for loop (I want to have constantly music at the background).

The problem is that it plays all the songs at once and as I can understand a timer that expires very quickly (I use this timer for the joystick) is responsible for that. I think I have to use another timer, but I have no idea what expiration time it should have, how many repeats, when to start it etc.

Can you give me any suggestions before I send my code?

Thanks
Maria

[farshizzo]

Here is an example script that uses the viztask module to loop through a playlist of songs. Let me know if anything is unclear.

import viz
import viztask
viz.go()

PLAYLIST = ['crash.wav','BOING!.WAV','quack.wav']

def PlayMusicTask(songs):
	"""Task that loops through a playlist of songs"""
	
	#Preload all songs
	songCycle = viz.cycle([ viz.addAudio(filename) for filename in songs ])
	
	#Loop indefinitely through song list
	while True:
		
		#Play next song
		song = songCycle.next()
		song.play()

		#Wait for song to end
		yield viztask.waitMediaEnd(song)

#Schedule music task
viztask.schedule( PlayMusicTask(PLAYLIST) )

[mrvr]

Thanks for the quick reply (you've saved me a lot of time!)

The only unclear thing is the following line:

songCycle = viz.cycle([ viz.addAudio(filename) for filename in songs ])

It will load the songs as it is or I have to change something? (ie replace the "filename" with the first (actual) filename in songs?)

I also met another problem. I had these errors when I run the code:

Traceback (most recent call last):
File "C:\Program Files\WorldViz\Vizard30\python\viztask.py", line 685, in _onupdate
self._tasks = [ t for t in self._tasks if not t.update() ]
File "C:\Program Files\WorldViz\Vizard30\python\viztask.py", line 652, in update
val = self.__stack[-1].next()
File "museum.py", line 78, in PlayMusicTask
songCycle = viz.cycle([ viz.addAudio(filename ) for filename in songs ])
File "C:\Program Files\WorldViz\Vizard30/python\viz.py", line 7524, in addAudio
return VizAudio(_ipcSend(_VIZ_ADDAUDIO,0,0,fileName,0.0,0 .0,0.0,0.0),**kw)
TypeError: message must be a string

[farshizzo]

Did you get that error by running the exact code I posted?

That line of code creates a cycle of audio objects from the file names. All you have to change is the PLAYLIST variable to contain all the filenames of songs you want to play.

[mrvr]

It was the exact code! The only different thing was the PLAYLIST, where I had replaced the sounds with my songs :-)

[farshizzo]

So it wasn't the exact code? I'm assuming you incorrectly defined the PLAYLIST variable. I can't provide anymore help unless you post the code you are using.

[mrvr]

You were right. I fixed the problem.
Thanks a lot for your help and time!

[NicoleVR]

Hello, the code you helped with here has a loop to indefinetly loop through the songs. What if i want the loop to go through each element in the array only once? is there a way to detect that?

Thanks,

Nicole

[Jeff]

Since you're not going to cycle through the songs you could use a standard list and a for loop:

#Preload all songs
songList = [ viz.addAudio(filename) for filename in songs ]

for song in songList:
	
	song.play()
	#Wait for song to end
	yield viztask.waitMediaEnd(song)