Pitch vs. Frequency on the Sinclair QL
by Marq

f = 11336.256 / (p + 8.634)
p = 11336.256 / f - 8.634

Playable notes and their pitches:

F1	251
F#1	236
G1	222
G#1	210
A1	197
A#1	187
B1	175

C2	165
C#2	155
D2	146
D#2	137
E2	129
F2	121
F#2	114
G2	107
G#2	101
A2	94
A#2	89
B2	83

(at this point we're off about 0.5 Hz max.)

C3	78
C#3	73
D3	69
D#3	64
E3	60
F3	56
F#3	53
G3	49
G#3	46
A3	43
A#3	40
B3	37

(the biggest deviations have grown to 1 Hz+)

C4	35
C#4	32
D4	30
D#4	28
E4	26
F4	24
F#4	22
G4	20
G#4	19
A4	17
A#4	16
B4	14

(at this point the notes have very little to do with the periods, but
 let's keep going for the sake of completeness...)

C5	13
C#5	12
D5	11
D#5	10
E5	9
F5	8
F#5	7
G5	6
G#5	5
A5	4
B5	3

C6	2
D6	1
E6	0

Pitch frequencies:
0	1313.00
1	1176.71
2	1066.05
3	974.42
4	897.29
5	831.48
6	774.66
7	725.11
8	681.52
9	642.87
10	608.37
11	577.38
12	549.40
13	524.01
14	500.85
15	479.66
16	460.19
17	442.24
18	425.63
19	410.23
20	395.90
21	382.54
22	370.06
23	358.36
24	347.38
25	337.05
26	327.32
27	318.13
28	309.45
29	301.22
30	293.43
31	286.02
32	278.99
33	272.28
34	265.90
35	259.80
36	253.98
37	248.42
38	243.09
39	237.99
40	233.09
41	228.40
42	223.89
43	219.55
44	215.38
45	211.36
46	207.50
47	203.77
48	200.17
49	196.69
50	193.34
51	190.10
52	186.96
53	183.93
54	180.99
55	178.15
56	175.39
57	172.72
58	170.13
59	167.61
60	165.17
61	162.80
62	160.49
63	158.25
64	156.07
65	153.95
66	151.89
67	149.88
68	147.93
69	146.02
70	144.17
71	142.35
72	140.59
73	138.87
74	137.19
75	135.55
76	133.94
77	132.38
78	130.85
79	129.36
80	127.90
81	126.47
82	125.08
83	123.71
84	122.38
85	121.07
86	119.79
87	118.54
88	117.31
89	116.11
90	114.93
91	113.78
92	112.65
93	111.54
94	110.45
95	109.39
96	108.34
97	107.32
98	106.31
99	105.32
100	104.35
101	103.40
102	102.47
103	101.55
104	100.65
105	99.76
106	98.89
107	98.04
108	97.20
109	96.37
110	95.56
111	94.76
112	93.97
113	93.20
114	92.44
115	91.69
116	90.96
117	90.23
118	89.52
119	88.82
120	88.13
121	87.45
122	86.78
123	86.12
124	85.47
125	84.83
126	84.20
127	83.58
128	82.97
129	82.37
130	81.77
131	81.19
132	80.61
133	80.04
134	79.48
135	78.92
136	78.38
137	77.84
138	77.31
139	76.79
140	76.27
141	75.76
142	75.26
143	74.76
144	74.27
145	73.79
146	73.31
147	72.84
148	72.37
149	71.92
150	71.46
151	71.01
152	70.57
153	70.14
154	69.70
155	69.28
156	68.86
157	68.44
158	68.03
159	67.63
160	67.22
161	66.83
162	66.44
163	66.05
164	65.67
165	65.29
166	64.91
167	64.54
168	64.18
169	63.82
170	63.46
171	63.11
172	62.76
173	62.41
174	62.07
175	61.73
176	61.40
177	61.07
178	60.74
179	60.42
180	60.10
181	59.78
182	59.47
183	59.16
184	58.85
185	58.54
186	58.24
187	57.95
188	57.65
189	57.36
190	57.07
191	56.79
192	56.50
193	56.22
194	55.94
195	55.67
196	55.40
197	55.13
198	54.86
199	54.60
200	54.34
201	54.08
202	53.82
203	53.57
204	53.31
205	53.06
206	52.82
207	52.57
208	52.33
209	52.09
210	51.85
211	51.61
212	51.38
213	51.15
214	50.92
215	50.69
216	50.47
217	50.24
218	50.02
219	49.80
220	49.58
221	49.37
222	49.15
223	48.94
224	48.73
225	48.52
226	48.31
227	48.11
228	47.91
229	47.70
230	47.50
231	47.31
232	47.11
233	46.92
234	46.72
235	46.53
236	46.34
237	46.15
238	45.96
239	45.78
240	45.59
241	45.41
242	45.23
243	45.05
244	44.87
245	44.70
246	44.52
247	44.35
248	44.17
249	44.00
250	43.83
251	43.66
252	43.49
253	43.33
254	43.16
255	43.00