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D. Rocchesso: Sound Processing
take reasonably prudent steps, when you begin distribution of Opaque copies
in quantity, to ensure that this Transparent copy will remain thus accessible at
the stated location until at least one year after the last time you distribute an
Opaque copy (directly or through your agents or retailers) of that edition to the
public.
It is requested, but not required, that you contact the authors of the Doc-
ument well before redistributing any large number of copies, to give them a
chance to provide you with an updated version of the Document.
D.4
MODIFICATIONS
You may copy and distribute a Modified Version of the Document under the
conditions of sections D.2 and D.3 above, provided that you release the Modified
Version under precisely this License, with the Modified Version filling the role
of the Document, thus licensing distribution and modification of the Modified
Version to whoever possesses a copy of it. In addition, you must do these things
in the Modified Version:
A Use in the Title Page (and on the covers, if any) a title distinct from that
of the Document, and from those of previous versions (which should, if
there were any, be listed in the History section of the Document). You
may use the same title as a previous version if the original publisher of
that version gives permission.
B List on the Title Page, as authors, one or more persons or entities respon-
sible for authorship of the modifications in the Modified Version, together
with at least five of the principal authors of the Document (all of its prin-
cipal authors, if it has fewer than five), unless they release you from this
requirement.
C State on the Title page the name of the publisher of the Modified Version,
as the publisher.
D Preserve all the copyright notices of the Document.
E Add an appropriate copyright notice for your modifications adjacent to
the other copyright notices.
F Include, immediately after the copyright notices, a license notice giving
the public permission to use the Modified Version under the terms of this
License, in the form shown in the Addendum below.
G Preserve in that license notice the full lists of Invariant Sections and re-
quired Cover Texts given in the Document's license notice.
H Include an unaltered copy of this License.
I Preserve the section Entitled "History", Preserve its Title, and add to it
an item stating at least the title, year, new authors, and publisher of the
Modified Version as given on the Title Page. If there is no section Entitled
"History" in the Document, create one stating the title, year, authors, and
publisher of the Document as given on its Title Page, then add an item
describing the Modified Version as stated in the previous sentence.