Disklavier

Actually, there is legal precedent for an IP filter being sufficient.
Look at the recent (and unfortunate) cease-and-desist letter written
to the operator of the International Sheet Music Library Project:

http://imslpforums.org/Second%20U-E%20Cease%20and%20Desist%20Letter.pdf

These lawyers claim that they would be satisfied by an IP filter.

On Jan 17, 2008 9:35 AM, Matthew Teeter <mrmuk7@...> wrote:
> It is also very easy to masquerade with a fake IP by using a proxy.  An
> IP-filter probably wouldn't satisfy the legal people.  The best system would
> be to give customers a password upon purchase and each subsequent mail
> update, and authenticate customers with that.
>
> The article is an interesting find.  I am curious what interface they have
> created for controlling the Disklavier from PC.