No audio is played when Playbable Mixer is changed at runtime

6.5.X

As Designed

Thank you for reporting a bug to Unity. After reviewing the behavior, we've confirmed it aligns with the current design and intended use of the feature. We understand this may differ from your expectations or workflow. We will close this case as 'As Designed.' If you have feedback on how the feature could better meet your needs, please let us know - we value your input and consider it in future improvements. Audio in a PlayableGraph is processed by the Audio System, which goes through the AudioPlayableOutput and converts Audio playable logic into something that the Audio System can process. The result is cached. This cache is invalidated only when something changes on the AudioPlayableOutput itself. When disconnecting and reconnecting the AudioMixerPlayable the AudioPlayableOutput does not detect any change to its own connection and so doesn't rebuild the Audio. You end up with: On one side the disconnected Output which is no longer pinged for evaluation On the other side the newly connected output which is pinged for evaluation but believes it is not connected to any AudioClip and has nothing to play. To switch AudioSource and invalidate the cache you can instead change the Target OR change the Output connection directly. [Button] public void SwitchToRight() { audioOutput.SetTarget(right); //OR leftOutput.SetSourcePlayable(Playable.Null); rightOutput.SetSourcePlayable(audioMixerPlayable); } [Button] public void SwitchToLeft() { audioOutput.SetTarget(left); //OR rightOutput.SetSourcePlayable(Playable.Null); leftOutput.SetSourcePlayable(audioMixerPlayable); }