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A cable includes an electrical conductor, a first insulating jacket disposed adjacent the electrical conductor and having a first relative permittivity, and a second insulating jacket disposed adjacent the first insulating jacket and having a second relative permittivity that is less than the first

A cable includes an electrical conductor, a first insulating jacket disposed adjacent the electrical conductor and having a first relative permittivity, and a second insulating jacket disposed adjacent the first insulating jacket and having a second relative permittivity that is less than the first relative permittivity. A method includes providing an electrical conductor, extruding a first insulating jacket having a first relative permittivity over the electrical conductor, and extruding a second insulating jacket having a second relative permittivity over the electrical conductor, wherein the second relative permittivity is less than the first relative permittivity.

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A cable includes an electrical conductor, a first insulating jacket disposed adjacent the electrical conductor and having a first relative permittivity, and a second insulating jacket disposed adjacent the first insulating jacket and having a second relative permittivity that is less than the first

A cable includes an electrical conductor, a first insulating jacket disposed adjacent the electrical conductor and having a first relative permittivity, and a second insulating jacket disposed adjacent the first insulating jacket and having a second relative permittivity that is less than the first relative permittivity. A method includes providing an electrical conductor, extruding a first insulating jacket having a first relative permittivity over the electrical conductor, and extruding a second insulating jacket having a second relative permittivity over the electrical conductor, wherein the second relative permittivity is less than the first relative permittivity. data information define time intervals each between two events successively to occur in the production of said plurality of first tones, and said second pieces of timing data information define lapses of time from a reference time to second tones to be produced on the basis of pieces of music data information stored in said music data codes of said second sort. 3. The data synchronizer as set forth in claim 2, in which said music passage includes a certain second tone at the head of a movement or musical composition, and said certain second tone starts at said reference time. 4. The data synchronizer as set forth in claim 2, in which said music data codes of said first sort are formatted in accordance with standards of MIDI (Musical Interface Digital Interface), and said music data codes of said second sort are formatted in accordance with standards for CD-DA (Compact Disc Digital Audio). 5. The data synchronizer as set forth in claim 2, in which said mapping means creates a table defining relations between the events to occur and said third times and between said third times and locations at which the music data codes of said second sort representative of the pieces of music data information defining said second tones are stored. 6. The data synchronizer as set forth in claim 1, said music data codes of said first sort are selected from plural sets of music data codes of said first sort by using a bit string representative of contents of an information storage medium for storing said music data codes of said first sort. 7. The data synchronizer as set forth in claim 6, in which said information storage medium is a music compact disc. 8. The data synchronizer as set forth in claim 7, in which said music compact disc stores a table of contents, and said bit string represents said table of contents. 9. The data synchronizer as set forth in claim 6, in which said bit string is representative of the second tones in a head portion of said music passage. 10. The data synchronizer as set forth in claim 6, further comprising a searching means searching said memory for a bit string identical with said bit string so as to select said music data codes of said first sort from said plural sets of music data codes. 11. The data synchronizer as set forth in claim 6, further comprising a communicating means sending said bit string and receiving said music data codes of said first sort through a communication line. 12. A method for transmitting music data codes of a first sort to a first sound source synchronously with a playback through a second sound source on the basis of music data codes of a second sort, comprising the steps of: a) acquiring said music data codes of said first sort representative of first pieces of music data information defining a plurality of first tones of a music passage and first pieces of timing data information defining first times to produce said first tones in accordance with a first rule and at least second pieces of timing data information stored in said music data codes of said second sort and defining second times to produce a plurality of second tones of said music passage in accordance with a second rule different from said first rule; b) converting said first times to third times defined in accordance with said second rule; c) instructing said second sound source to start said playback; and d) transferring said music data codes of said first sort to said first sound source in such a manner that the first tones corresponding to said certain music data codes are produced concurrently with the second tones corresponding to said at least selected ones. 13. The method as set forth in claim 12, in which said music data codes of said first sort and said music data codes of said second sort are supplied from a first data source and a second data source different from said first data source, respectively. 14. The method as set forth in claim 12, in which said first rule is standards of MIDI (Musical Instrum