TONE HOLES, diameters & ratios

sopranos

		1^st generation		2^nd generation		19^th century French		early 20^th c. French		early 20^th c. French		early 20^th c. French		early 20^th c. American		early 20^th c. American		mid 20^th c. French		later 20^th c. French		later 20^th c. French		early 21^th c. French		early 21^th c. Asian
Londeix	hole nr.	A.I. SAX 19575		A.I. SAX 41322		BUFFET-C^N 2237 (dated 1876)		A.E.Sax 15345		SELMER modèle 22 3076		COUESNON 53784 (dated 1928)		BUESCHER truetone 146891		CONN M199196		SELMER mark6 138592		BUFFET-C^N S1 26655E		SELMER SA80/II 464153		SELMER SA80/III 731147		YANAGISAWA 922 360963
		_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%	_hole	%
B^b	1	no tone hole		no tone hole		no tone hole		28.7	37	30.5	42	35.7	69	31.5	45	30.8	44	31.5	48	32.8	54	30.0	43	27.8	37	31.2	45
8	2	27.2	42	25.3	33	29.0	46	24.7	31	30.3	48	28.9	53	29.2	47	29.0	44	31.5	53	30.2	52	30.0	48	27.8	42	31.2	50
C^#	3	21.3	29	20.7	25	25.0	39	20.4	24	24.4	34	25.9	44	24.5	38	24.8	37	28.0	48	27.2	47	26.8	43	24.8	38	27.6	44
7	4	26.3	49	26.8	46	27.2	57	27.4	49	28.5	53	24.3	45	24.7	43	27.2	49	29.0	58	29.2	61	27.5	52	27.6	53	28.5	52
D^#	5	18.5	26	19.3	27	19.2	28	19.3	27	19.1	27	23.0	42	17.6	24	19.3	28	20.5	31	20.0	32	20.2	31	20.2	31	20.0	29
6	6	22.5	44	22.3	41	23.6	49	23.3	46	23.7	47	25.0	56	22.2	41	23.9	49	24.5	53	23.0	48	24.4	52	24.7	53	24.7	50
5	7	18.6	33	18.5	32	17.6	30	18.9	34	19.1	32	19.1	36	19.4	41	18.0	31	20.0	37	18.6	37	19.9	38	20.0	40	20.3	38
Tf	8	no tone hole		no tone hole		no tone hole		16.8	30	15.7	25	11.1	15	11.1	14	16.1	28	17.2	31	15.0	27	17.2	33	12.0	17	17.2	30
4	9	18.4	34	19.3	38	20.4	46	19.1	39	20.7	43	19.1	41	22.0	51	20.9	47	22.0	52	21.0	52	21.8	52	22.0	50	22.0	50
	10	16.7	31	16.7	32	14.7	27	16.8	42	14.3	24	15.1	28	13.8	22	14.3	25	19.5	46	14.9	28	15.6	30	15.7	31	16.0	29
G^#	11	14.0	24	14.1	26	12.4	21	14.1	26	13.2	25	13.0	24	15.0	29	13.7	26	14.3	30	14.5	30	14.5	29	14.5	29	14.5	27
3	12	15.4	33	15.7	36	17.6	48	16.0	38	16.8	37	13.0	26	15.7	37	17.8	48	19.0	53	15.4	39	18.6	~ 54 ³)	18.8	~ 60	18.7	49
Ta	13	no tone hole		no tone hole		no tone hole		10.8	20	10.3	18	11.2	21	10.2	18	10.4	18	10.8	20	9.8	17	11.0	22	11.1	22	11.0	20
2	14	10.0	15	10.5	19	10.5	20	10.8	20	11.6	22	10.8	20	10.6	19	11.7	24	10.8	20	10.0	18	10.3	19	10.0	18	11.0	20
P	15	13.1	30	12.9	31	11.8	28	12.7	31	7.8	11	9.1	16	8.2	13	7.9	12	9.2	16	8.0	13	9.0	16	8.5	14	9.2	15
Tc	16	no tone hole		no tone hole		no tone hole		7.9	14	10.4	21	11.1	24	9.8	19	10.4	22	10.8	25	10.8	25	11.0	~ 26	11.0	~ 24	11.0	24
1	17	12.3	30	12.2	31	11.7	31	12.7	34	11.3	26	13.0	34	12.5	33	11.8	34	12.8	35	11.4	29	12.9	~ 37	13.0	~ 36	12.3	32
	18	4.7	05	6.4	9	4.5	05	7.7	14	4.5	05	5.4	07	5.2	07	4.8	06	8.0	15	5.4	07	7.3	~ 12	7.1	~ 11	7.5	13
	18 ¹)	no mechanism		no mechanism		no mechanism		5.1	06	key closes entirely		no mechanism		key closes partially		key closes partially		4.0	04	3.3 ²)	03	5.4	07	5.3	~ 06	4.1	04
C1	19	4.7	05	6.5	10	4.7	06	6.5	10	6.0	09	6.5	10	5.3	07	5.7	09	6.5	11	6.7	12	7.2	14	6.4	11	6.5	10
C2	20	4.7	06	6.4	10	4.7	07	6.5	11	4.6	05	6.5	11	5.2	07	5.3	08	6.5	13	6.5	12	7.3	~ 15	7.4	~ 15	6.4	11
C3	21	no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		5.6	09	5.3	09	6.5	13	5.2	08	7.0	15	7.0	15	6.5	12
C4	22	no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		5.3	08	5.9	11	6.5	14	5.1	10	6.6	15	6.1	13	6.5	13
C5	25	no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		5.2	09	6.1	14	5.2	10	6.0	12
C6	26	no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		no tone hole		5.5	12	5.0	09

¹) hole nr. 18 for the second time is the hole as reduced by the C^#-correction mechanism.
²) The Buffet Crampon S1 originally has no C^#-correction mechanism; in this particular instrument it has been added.
³) Values indicated with a ~ are based on a calculated bore width.