4,094 bytes added,
14:27, 16 January 2010 Here are some measured timings for the [[SP0256]]-AL2 speech chip. Mainly here to confirm and understand how it works. All timings were measured by gerald, on a Amstrad SSA-1 with 3.12MHz ceramic resonator.
== PWM Output ==
[[File:SP0256 PWM Output.png]]
== Allophone Lengths ==
This table shows the allophone lengths in milliseconds.
* spec = Timings from original datasheets (these values are totally wrong)
* calc = Timings calculated from pitch/repeat values in the -AL2 ROM
* min/avg/max = Timings measured on real hardware (Amstrad SSA-1)
The min/avg/max values are slightly higher than the calculated values. This is probably because the SP0256 executes "NOPs" with repeat=1 while in standby mode, and refuses to start a new allophone until it has finished the "NOP".
num name spec calc min avg max
00 PA1 10.0 6.4 6.66 10.05 12.80
01 PA2 30.0 25.6 26.71 31.33 32.37
02 PA3 50.0 44.8 46.05 50.12 51.39
03 PA4 100.0 96.0 97.81 101.72 103.24
04 PA5 200.0 198.4 200.50 204.11 206.69
05 /OY/ 420.0 291.2 293.06 297.24 299.12
06 /AY/ 260.0 172.9 174.81 175.98 176.96
07 /EH/ 70.0 54.6 56.32 57.05 57.94
08 /KK3/ 120.0 76.8 78.82 79.89 81.05
09 /PP/ 210.0 147.2 148.91 153.20 155.04
0A /JH/ 140.0 98.4 99.15 103.24 105.45
0B /NN1/ 140.0 172.9 174.89 175.81 176.92
0C /IH/ 70.0 45.5 46.80 47.73 48.38
0D /TT2/ 140.0 96.0 98.85 99.47 100.29
0E /RR1/ 170.0 127.4 128.37 132.63 134.44
0F /AX/ 70.0 54.6 55.55 57.01 57.97
10 /MM/ 180.0 182.0 184.14 185.08 186.15
11 /TT1/ 100.0 76.8 78.47 79.92 80.93
12 /DH1/ 290.0 136.5 137.33 141.89 143.54
13 /IY/ 250.0 172.9 174.31 175.74 176.46
14 /EY/ 280.0 200.2 201.75 202.85 203.69
15 /DD1/ 70.0 45.5 46.95 48.12 49.14
16 /UW1/ 100.0 63.7 65.20 66.21 66.78
17 /AO/ 100.0 72.8 74.09 75.46 76.50
18 /AA/ 100.0 63.7 64.51 65.72 67.49
19 /YY2/ 180.0 127.4 128.82 129.93 131.25
1A /AE/ 120.0 81.9 83.35 84.44 85.51
1B /HH1/ 130.0 89.6 91.78 92.79 93.78
1C /BB1/ 80.0 36.4 37.44 41.30 43.08
1D /TH/ 180.0 128.0 130.04 130.96 131.91
1E /UH/ 100.0 72.8 73.53 77.48 79.34
1F /UW2/ 260.0 172.9 174.95 175.91 176.66
20 /AW/ 370.0 254.8 256.68 258.09 259.14
21 /DD2/ 160.0 72.1 73.42 74.94 76.17
22 /GG3/ 140.0 110.5 111.86 113.73 114.78
23 /VV/ 190.0 127.4 128.55 130.10 131.48
24 /GG1/ 80.0 72.1 73.55 75.05 75.85
25 /SH/ 160.0 198.4 201.15 202.43 203.59
26 /ZH/ 190.0 134.1 135.23 139.72 141.61
27 /RR2/ 120.0 81.9 82.45 87.02 88.53
28 /FF/ 150.0 108.8 111.12 112.07 113.32
29 /KK2/ 190.0 134.4 136.08 140.64 142.21
2A /KK1/ 160.0 115.2 116.63 121.24 122.82
2B /ZZ/ 210.0 148.6 149.79 153.20 155.85
2C /NG/ 220.0 200.2 202.19 203.01 204.00
2D /LL/ 110.0 81.9 82.75 84.16 85.52
2E /WW/ 180.0 145.6 147.85 148.41 149.52
2F /XR/ 360.0 245.7 247.67 248.61 249.59
30 /WH/ 200.0 145.2 147.29 148.30 149.80
31 /YY1/ 130.0 91.0 92.79 94.04 94.87
32 /CH/ 190.0 147.2 149.15 150.62 151.77
33 /ER1/ 160.0 109.2 109.87 114.27 116.10
34 /ER2/ 300.0 209.3 211.77 212.71 213.70
35 /OW/ 240.0 172.9 174.74 176.24 177.05
36 /DH2/ 240.0 182.0 183.81 184.58 185.83
37 /SS/ 90.0 64.0 65.48 66.66 67.66
38 /NN2/ 190.0 136.5 141.65 142.48 143.68
39 /HH2/ 180.0 126.0 128.30 128.99 130.16
3A /OR/ 330.0 236.6 238.56 240.04 241.20
3B /AR/ 290.0 200.2 202.69 203.70 204.72
3C /YR/ 350.0 245.7 247.68 249.01 250.33
3D /GG2/ 40.0 69.4 71.15 71.96 73.17
3E /EL/ 190.0 136.5 138.22 139.21 140.52
3F /BB2/ 50.0 50.2 51.92 53.17 54.10