Originally Posted by
cncmachineguy
Well I only count 32 notes, but I'm on my phone so maybe I don't get to see the whole thing.
Sorry, should have made it clear...the table I posted above is actually longer, but I shortened it to be easier on the eye! (the jist of the table was just to show the methodology of converting incoming frequency (guitar notes), to counts (comparator1 interrupt counts) & finally the end goal - a midi note value.
the LUT will only have something like this (first two columns are upper and lower comparator 'counts' for each individual musical note boundary)
Code:
Lo Hi Midi Note
62479 58971 28
58972 55662 29
55663 52538 2A
52539 49589 2B
49590 46806 2C
46807 44179 2D
44180 41699 2E
41700 39359 2F
39360 37150 30
37151 35065 31
35066 33097 32
33098 31239 33
31240 29486 34
29487 27831 35
27832 26269 36
26270 24794 37
24795 23403 38
23404 22089 39
22090 20849 3A
20850 19679 3B
19680 18575 3C
18576 17532 3D
17533 16548 3E
16549 15619 3F
15620 14743 40
14744 13915 41
13916 13134 42
13135 12397 43
12398 11701 44
11702 11044 45
11045 10424 46
10425 9839 47
9840 9287 48
9288 8766 49
8767 8274 4A
8275 7810 4B
7811 7371 4C
7372 6957 4D
6958 6567 4E
6568 6198 4F
6199 5850 50
5851 5522 51
5523 5212 52
5213 4919 53
4920 4643 54
4644 4383 55
4384 4137 56
4138 3905 57
3906 3800 58
There are about 50 individual notes on a guitar - from lowest open E (82.4Hz) thru the highest E fretted at the 24th fret of the top E string (1318.51Hz)....so an LUT will need an array 50 deep & a check condition along these lines for any change in the count value...
Code:
if (comp1time>= 66194 and comp1time <= 62478) then note = $27
but to apply 50 of code like that each & every time guitar note changes is going to get time consuming, hence wanting something like a binary search algorithm for picbasic (a search on the forum yields almost nothing)
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