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LefreQue, the Idea

LefreQue, the Idea

LefreQue, The Idea

The appliance of LefreQue to the bassoon
Larger instruments are traditionally made up of smaller joints.

Transporting a large instrument is easier when it is possible to take it apart.
The idea for easy transportation is a good thing. We all want a very small case and as light a weight as possible.
The question of travelling bassoon players has been answered by bassoon makers who cut the long joint so that it fits in a shorter case. This case is then easier to take on the plane without any problem.

There is also a manufacturing issue in making an instrument in smaller joints.
Woodwind instrument makers have a good reason to do this.
The bore of a wind instrument is never a straight conical shape. The better makers in particular make the bore larger at certain points, to improve the sound and intonation.

With large instruments like the bassoon it is very difficult to make these complex bores.
All current instrument makers have grown old with books about acoustics.
One of the best known acoustians was Arthur H. Benade (1925-1987)
Fundamentals of Musical Acoustics
(Dover Publications Inc, New York ISDN 0-486-26484-X)

Almost 600 pages about all kind of acoustics.
It deals with conical and cylindrical bores and mentions that the wall makes no difference, as the vibrations cannot be calculated.

This is a problem. Makers and musicians know very well that the material of which the instrument is made is very important. For the bassoon, we know the quality of the wood is very important for the quality of the sound and the projection of the instrument.
Cutting every wind instrument into shorter joints will leave us with sound and intonation problems. This has long been recognised.

Hans Kuijt, the inventor of LefreQue, proved to us that an intact tube has a much bigger effect on a wind instrument than anyone ever expected.

Every connection in an acoustical unit disturbs the vibrations.
A cork connection blocks the vibration, but so does a soldered or sliding connection.
The test measured very clearly that the fundamentals were transported almost normally through the connection, but the overtones were held back.
So the overtones get shorter. When a vibration gets shortened, we all know that the tone gets sharper.
It is going out of tune!
You can play like an absolute star but it will be out of tune if the overtones don’t merge with the fundamentals.
The effects:

Playing out of tune (interference)
Strange (wolf) tones
Harder to tune with other instruments (always working hard to fit in)
Register changes will always be a problem (especially down jumps)
We all know that the tuning is easier if you and your colleagues are playing on the same brand of instruments.
These instruments have the same type of overtones and the same disturbances.

LefreQue connects the original tubes by restoring the sound breaks.

The results:

The overtones are combined again with their basic fundamental tone
Intonation within the instrument will be better
Down jumps no longer suffer from any delay
Optimal intonation
Easy legato
Better projection
And so on

If you are willing to test LefreQue have a look at for the dealerlist in your country.