> For the complete documentation index, see [llms.txt](https://support.babylonwaves.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.babylonwaves.com/trouble-shooting/opus-isnt-switching.md).

# OPUS isn't switching

This is an unresolved bug in the OPUS player. OPUS sometimes loads iob/iot files and no articulation is selected.  There's how you can make it work:

Drag the .oib file onto the OPUS player.

<figure><img src="/files/CNC5RDnYMR6OfnS1U61W" alt=""><figcaption></figcaption></figure>

Select Play > Articulations in the OPUS player

<figure><img src="/files/lBKPqKdVExKpADb2bgsD" alt=""><figcaption></figcaption></figure>

Select an Articulation

<figure><img src="/files/iukSbYt3CZw2uTgXEAN3" alt=""><figcaption></figcaption></figure>

Now you should be able to switch articulations just fine.


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