> 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/sine-doesnt-key-switch.md).
# Sine doesn't key switch
Make sure that the following options are set back to their default values. Under certain circumstances, Sine forgets those settings and Art Conductor templates will stop working:
#### Options > Key Switches:
KS Area Start (High Instr): C0 \
KS Area Start (Low Instr): C6
Once done, load the instrument again.
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