TONE-INTERVAL INTERFACE 協音指南

 The following data are collected through perception tests conducted with native Cantonese speakers, who had to choose musical intervals (within the range of a major 9th, or 14 semi-tones) that they considered intelligible for each combination of tone succession.
團隊早前與粵語母語使用者進行聆聽實驗。實驗者需要為每個粵語聲調組合辨識協音音程（函蓋大九度，即十四個半音距離之內的所有音程）。以下為部分實驗數據。

​Ascending 上行
Descending 下行
Level Tones 同調

Ascending Contours

Tone Combination	Intelligible Intervals*	Ranking**
2-1 (e.g.寫生)	Unison, M2	M2>Unison
3-1 (e.g.信心)	M2, M3	M2=M3
3-2 (e.g.笑話)	M2, M3, A4	M2=M3>A4
4-1 (e.g.沉思)	P4, P5, m6, M6, m7, M7, P8, M9	P5=M6=M7=P8>M9>m6>m7>P4
4-2 (e.g.流水)	P4, P5, m6, M6, m7, M7, P8, M9	P5=M6=M7=P8>M9>m7>m6>P4
4-3 (e.g.遊戲)	m3, P4, d5, P5, m6, m7, P8, m9	m6>d5>P4>P8>m7>m3=m9>P5
4-5 (e.g.寒冷)	m3, P4, d5, P5, m6, m7, P8, m9	d5=m6>P4>P8>m7>P5>m3>m9
4-6 (e.g.然後)	M3, M2	M3>M2
5-1 (e.g.眼睛)	M2, M3, A4, P5, M6	M2=M3>A4>M6>P5
5-2 (e.g.也許)	M2, M3, A4	M2=M3>A4
5-3 (e.g.滿意)	Unison	N/A
6-1 (e.g.自私)	m3, M3, P4, P5, m6	M3>P4>m3>P5>m6
6-2 (e.g.預感)	m3, M3, P4, P5, m6	M3>m3>P4>A4=P5>m6
6-3 (e.g. 面對)	m2, m3, m6	m2>m3>m6
6-5 (e.g.父母)	m2, m3, d5, m6	m2>m3>d5>m6

Key: 
m2 = minor 2nd; M2 = major 2nd; m3 = minor 3rd; M3 = major 3rd; P4 = perfect 4th; A4 = augmented 4th; d5 = diminished 5th; 
P5 = Perfect 5th; m6 = minor 6th; M6 = major 6th; m7 = minor 7th; M7 = major 7th; P8 = Octave; m9 = minor 9th; M9 = major 9th
*Intelligible Intervals:  intervals that over 75% of respondents considered intelligible for at least one of its occurrence in a diatonic scale.
**Ranking: intervals ranked in descending order according to percentage of respondents who find them intelligible, rounded to the nearest 0.01%.