Troubleshooting: NodeAlreadyPlayingException

Example

signalflow.NodeAlreadyPlayingException: Node cannot be played as it is already
playing

Description

This exception occurs when play() is called on a Node or Patch object that is already playing.

Solution

Calling play() on a Node object simply connects the output of that node to the output endpoint of the audio graph, which means that frames will be requested from it in future audio I/O blocks.

Calling play() a second time therefore has no effect, because the Node is already connected.

If you want to play a particular sound twice, you should instead create two instances of the Node or Patch, and play them individually. So instead of:

ping = Ping()
ping.play()
time.sleep(1)
ping.play() # incorrect 

You should write:

ping = Ping()
ping.play()
time.sleep(1)
ping = Ping() # create and play a new Ping 
ping.play() 

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Last update: 2024-10-29
Created: 2024-07-22