AC3Filter: I've fallen and I can't get up

[Redmondman]

I know, I shouldn't mess with things when they're working.

For some reason, I felt I had too many AC3 decoders in my DirectShow graphs, so I lowered the merit on AC3Filter. Then I realized that I wanted it back (I had it set to raise the gain on center channel), so I raised the merit back. But now I can't get it to come back into my graphs at all. Even trying to manually insert and connect pins results in:

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GraphEdit
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These filters cannot agree on a connection. Verify type compatibility of input pin and output pin.

No combination of intermediate filters could be found to make the connection. (Return code: 0x80040217)
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OK
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(specifically, trying to connect AC3Filter's output pin to any input pin).

I tried reinstalling and rebooting.

Any ideas on how to get AC3Filter to filter again?

[ACrowley]

Try to reregister DTS/AC3 Source Filter

[clsid]

Uninstall the filter and re-install it again.

In the option, on the system tab, uncheck PCM. That way AC3Filter won;t be used in all your graphs, but only for AC3/DTS.

[Redmondman]

The uninstall/reinstall sequence worked. (I had just done a reinstall.)