For the note C5, the diameter of the Paulello-Stuart wire is 35mm thicker, the tensile strength of the Paulello/Stuart wire is 138 N/mm² higher . The Paulello-Stuart wire for C5 is 4.5mm longer, and is set at 7kg higher tension. The yield or capacity of the Paulello-Stuart wire is approximately 10% higher than the Roslau-Steinway wire.

The Significance of Design On Sound.

The physical parameters and design attributes of the Stuart No.19and the Steinway No.574500 pianos’ presented above have been found by this research to significantly affect the qualities of sound produced by each instrument. In chapter four I present a detailed analysis of the various qualities of tonal colour produced by each piano. Each piano sound is described and illustrated in the analysis with its associated string scale dimensions, and the amplitudes of its specific string and soundboard vibrations.Through this analytical process, I established the four tonal characteristics¹⁴⁰ that define the uniquetonal characteristics of the Stuart & Sons piano sound. In the following chapter,the Stuart Bridge Agraffe is tested, and found to affect a more vertical string vibration, which fundamentally contributes to the production of the distinctive tonal qualities in the Stuart piano sound. These findings have provided me with a platform of knowledge that describes the tonal qualities of the Stuart piano sound. I have used this knowledge base to enquire how audiences perceive the tonal qualities of the Stuart piano sound in survey questions, presented in chapter five.I have also used this knowledge base for the creation of compositions using the qualities of the Stuart piano sound, presented in chapter six.

¹⁴¹See page 14.