现在，Synthesizer V Studio 的参数绘制方式有：
- 鼠标 / 数位板绘画，自动简化
- 添加控制点，自动插值
第一种绘制方式的问题在于，精准度和效率都不甚理想，还有可能出现在绘制参数的过程中主程序卡住导致参数不能及时被录入或者完整录入；第二种的问题则在于只能通过添加控制点来使用默认的余弦或适应性样条曲线进行插值，而如果需要更精细的调整则需要添加更多的控制点，而且调整效果也可能不甚理想。
因此，可以考虑引入贝塞尔曲线 (Bézier Curve) 以获得更大的参数绘制自由度。据我所知，已经有一些歌声合成软件使用这种方式调控参数。当然，原有的参数绘制方案也 应当 得到保留，因为它们为初步调控提供了更快的方式。
fig 1 贝塞尔曲线
#lang:en
Synthesizer V Studio now has the following parametric drawing methods.
- Drawing with mouse / sketching tablet, automatic simplification
- Adding control points, automatic interpolation
The problem with the first drawing method is that it is not very accurate and efficient, and there is a risk that the main program may get jammed during the drawing process and the parameters may not be recorded in time or completely; the problem with the second one is that the default cosine or adaptive spline curve can only be interpolated by adding control points, while more control points need to be added if finer adjustments are needed, and the adjustment results may be less than satisfactory.
Therefore, one might consider introducing a Bézier Curve to get more freedom in drawing parameters. I am aware that some vocal synthesis software already uses this approach to control parameters. Of course, the original parameter plotting schemes should be retained, as they provide a faster way of initial control.
fig 1 Bézier curve
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