System and method for controlling play of multiple audio tracks of a software carrier
CA 2175064 C · Owner: Cookson, Christopher J. · Inventors: Ostrover, Lewis S.; Cookson, Christopher J.; Lieberfarb, Warren N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for selectively combining numerous audio tracks recorded on an optical disk (23) including subtracting, by phase inversion particular tracks from a full mix. Each track might contain a recording of an individual instrument or a group of instruments. When the, disk (23) is played the player provides the user with menu choices (79) -- which tracks should be played and mixed together. In this way the user can create his/her own orchestral mix perhaps omitting an instrument in a "play along" application or playing one instrument, alone to be mimicked for practice purposes. The disk (23) further includes track definitions in multiple languages (79) so that the same disk (23) can be …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 13, 1994 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.