Current methods of music-making require instruments that differ from those in previous periods. Large concert-halls, and the orchestras suitable for these large halls, require instruments which are stable in tone and rather loud. The materials and
production-methodes used for instruments nowadays amply much these requirements. Making music in an authentic way,
however, leads to other requirements. Flexibility and the possibility of blending the sound, are prominent here.
Geert Jan

Flexibility is essential if one have to play in temperaments, differing from the modern equal one, and music making in small groups requires sounds which are excellently blending. This is
achieved by choosing the correct measurements, by treating the materials correctly and by the thickness of the walls of the instruments. All the measurements are copied from, or based on the
best preserved and qualitatively best original instruments to be found in European collections.

Besides the instruments already included in the program, it is possible to make replicas of any existing original instrument. Apart from replicas a cheaper production-methode has also been devised. With this instruments only the bell is hammered. The cilindrical parts are made from seamless tubes. This implies extensive time-saving and result in instruments that sound
reasonably authentic, at a lower price.

With historical instruments, their form and beauty are as functional as their musical qualities.
A good instrument "deserves" its decorations; they complete the replica.

If so desired all the decorations will be engraved by hand. The surface of the brass instruments is not polished or laquered. In order
to keep the wallthickness and its elasticity under control, scraping is the final treatment. In this way texture and appearance of
the instrument are identical to those in the Baroque and Renaissance.