pitchclock 0.0.4

许可证

俯仰时钟分布在允许的MIT license下。

链接：

• 分布：https://pypi.python.org/pypi/pitchclock
• 来源：https://github.com/hosford42/pitchclock

示例用法

作为一个例子，让我们比较一下平均气质主量表 它的近似语调音阶，称为syntonic diatonic scale。音调 时钟用于可视化关系，即间隔， 在投球之间，而不是绝对投球本身。因此 典型的方法是用 产生它们的补药，并在12点放置补药 位置。等音程表示为 在音程中用方括号括起来的半色调。正义 间隔用整数频率比表示。为了这个 图表，我们将用填充圆标记相等的气质区间， 有轮廓圆圈的音程和有角度的主音 作记号。下面是生成图形的代码：

fromfractionsimportFractionfrompitchclockimportETInterval,ToneClock# The equal temperament scale, expressed as equal temperament# intervals from the tonic.et_major_scale=[ETInterval(s)forsin[0,2,4,5,7,9,11]]# The just intonation scale, expressed as frequency ratios from# the tonic.ji_major_scale=[Fraction(*pair)forpairin[(1,1),(9,8),(5,4),(4,3),(3,2),(5,3),(15,8)]]# Here we create the clock, indicating which pitches to represent# with each type of marking in the graph.clock=ToneClock(filled_dots=et_major_scale,empty_dots=ji_major_scale,angles=[et_major_scale[0],ji_major_scale[0]],labels={p:pforpinet_major_scale+ji_major_scale})# We make the radius a little bigger because there's a lot going# on in this graph. A bigger radius means more space for details.clock.style.radius*=1.5# Everything is quantized to quarter tones by default, but we are# building this graph specifically to compare slight differences# in pitch, so we turn it off. However, we leave it on for labels,# because otherwise they will overlap for pitches that are very# close neighbors. With quantization of labels left on, labels# falling within the same quantum will be grouped together with# commas to separate them.clock.style.quantize_non_labels=False# Save the clock as a PNG file. Currently, this is the only# supported format.clock.save('images/major_comparison.png')

这是它产生的图像：

主要比例尺比较

从这个图中，可以立即看出 等差近似最差的交响度标度 气质主音阶是5/4、5/3和15/8，每个音阶都是 比以前的音高略平 近似它。