U 是由大师级乐器发明家巴特霍普金创造的光滑钢片。这个创作不是每个音符有一个尖齿，而是每个音符有 14 个紧密间隔的尖齿。每组尖齿在三个或四个八度的范围内调整为八度和五度。声音是通过使用细棒状的拨片在所选音符的尖齿阵列上进行滑动动作来产生的。有十二个这样的组形成一个半音阶。由于每组跨越几个八度音阶，因此可以通过重音特定的音来创造性地演奏旋律。尖齿由狭窄的不锈钢机械螺钉制成，通过使用底部的六角螺母调整长度进行调整。此外，大多数螺钉都通过附加的六角螺母进行泛音调整，作为沿长度可调节的重物。最终的结果是一种迷人的液体和金属音色，非常适合您下一个需要真正独特音调的作品。
The U is a glissy steel lamellophone created by master instrument inventor Bart Hopkin. Rather than having one tine per note, this creation has 14 closely spaced tines per note. Each group of tines is tuned in octaves and fifths across a range of three or four octaves. The sound is produced by stroking with a glissing action across the array of tines for the chosen note, using a thin stick-like plectrum. There are twelve such groups forming a chromatic scale. Since each group spans several octaves, melodies can be played creatively by accenting specific tines. The tines are made of narrow stainless steel machine screws, tuned by adjusting the length using the hex nuts at the base. In addition, most of the screws are overtone-tuned by means of additional hex nuts serving as adjustable weights along the length. The final result is a fascinatingly liquid and metallic timbre, ideal for your next composition that requires a truly unique tone.