furnace/doc/7-systems/tia.md

Atari 2600 (TIA)

help me! I can't even get this character in where I want! I've spent hours debugging the issue, counting every possible cycle and I still cannot get it right!

only 2 channels and 31 frequencies?!

Furnace isn't complete without this one...

effects

• 10xx: select shape.
  • 0: nothing
  • 1: buzzy
  • 2: low buzzy
  • 3: flangy
  • 4: square
  • 5: square
  • 6: pure buzzy
  • 7: reedy
  • 8: noise
  • 9: reedy
  • A: pure buzzy
  • B: nothing
  • C: low square
  • D: low square
  • E: low pure buzzy
  • F: low reedy

tables

pitch number can be used for absolute notes in arpeggio macros.

shape 1

pitch	NTSC	note	cent	PAL	note	cent
0	2096.0	C-7	+2	2080.0	C-7	-1
1	1048.0	C-6	+2	1040.0	C-6	-1
2	698.7	F-5	0.0	693.3	F-5	-1
3	524.0	C-5	+2	520.0	C-5	-1
4	419.2	G#4	+16	416.0	G#4	+3
5	349.3	F-4	0.0	346.7	F-4	-13
6	299.4	D-4	+33	297.1	D-4	+20
7	262.0	C-4	+3	260.0	C-4	-11
8	232.9	A#3	-2	231.1	A#3	-15
9	209.6	G#3	+15	208.0	G#3	+2
10	190.5	F#3	+50	189.1	F#3	+37
11	174.7	F-3	+1	173.3	F-3	-13
12	161.2	E-3	-39	160.0	D#3	+48
13	149.7	D-3	+33	148.6	D-3	+20
14	139.7	C#3	+13	138.7	C#3	+1
15	131.0	C-3	+3	130.0	C-3	-11
16	123.3	B-2	-3	122.4	B-2	-16
17	116.4	A#2	0.0	115.6	A#2	-14
18	110.3	A-2	+5	109.5	A-2	-8
19	104.8	G#2	+16	104.0	G#2	+3
20	99.8	G-2	+31	99.0	G-2	+17
21	95.3	G-2	-49	94.5	F#2	+36
22	91.1	F#2	-27	90.4	F#2	-40
23	87.3	F-2	0.0	86.7	F-2	-12
24	83.8	E-2	+29	83.2	E-2	+16
25	80.6	E-2	-39	80.0	D#2	+48
26	77.6	D#2	-5	77.0	D#2	-18
27	74.9	D-2	+34	74.3	D-2	+20
28	72.3	D-2	-27	71.7	D-2	-41
29	69.9	C#2	+15	69.3	C#2	0
30	67.6	C#2	-44	67.1	C-2	+44
31	65.5	C-2	+3	65.0	C-2	-11

shapes 2, 3

pitch	NTSC	note	cent	PAL	note	cent
0	67.6	C#2	-44	67.1	C-2	+44
1	33.8	C#1	-42	33.5	C-1	+42
2	22.5	F#0	-46	22.4	F-0	+46
3	16.9	C#0	-44	16.8	C-0	+44
4	13.5			13.4
5	11.3			11.2
6	9.7			9.6
7	8.5			8.4
8	7.5			7.5
9	6.8			6.7
10	6.1			6.1
11	5.6			5.6
12	5.2			5.2
13	4.8			4.8
14	4.5			4.5
15	4.2			4.2
16	4.0			4.0
17	3.8			3.7
18	3.6			3.5
19	3.4			3.4
20	3.2			3.2
21	3.1			3.0
22	3.0			2.9
23	2.8			2.8
24	2.7			2.7
25	2.6			2.6
26	2.5			2.5
27	2.4			2.4
28	2.3			2.3
29	2.3			2.2
30	2.2			2.2
31	2.1			2.1

shapes 4, 5

pitch	NTSC	note	cent	PAL	note	cent
0	15720.0	B-9	-9	15600.0	B-9	-23
1	7860.0	B-8	-9	7800.0	B-8	-23
2	5240.0	E-8	-11	5200.0	E-8	-25
3	3930.0	B-7	-10	3900.0	B-7	-23
4	3144.0	G-7	+4	3120.0	G-7	-9
5	2620.0	E-7	-11	2600.0	E-7	-25
6	2245.7	C#7	+21	2228.6	C#7	+8
7	1965.0	B-6	-9	1950.0	B-6	-23
8	1746.7	A-6	-13	1733.3	A-6	-27
9	1572.0	G-6	+4	1560.0	G-6	-9
10	1429.1	F-6	+39	1418.2	F-6	+25
11	1310.0	E-6	-11	1300.0	E-6	-25
12	1209.2	D-6	+49	1200.0	D-6	+36
13	1122.9	C#6	+22	1114.3	C#6	+8
14	1048.0	C-6	+2	1040.0	C-6	-11
15	982.5	B-5	-10	975.0	B-5	-23
16	924.7	A#5	-15	917.6	A#5	-28
17	873.3	A-5	-14	866.7	A-5	-27
18	827.4	G#5	-7	821.1	G#5	-20
19	786.0	G-5	+4	780.0	G-5	-9
20	748.6	F#5	+20	742.9	F#5	+7
21	714.5	F-5	+39	709.1	F-5	+26
22	683.5	F-5	-38	678.3	E-5	+48
23	655.0	E-5	-12	650.0	E-5	-25
24	628.8	D#5	+18	624.0	D#5	+5
25	604.6	D-5	+49	600.0	D-5	+36
26	582.2	D-5	-16	577.8	D-5	-29
27	561.4	C#5	+21	557.1	C#5	+8
28	542.1	C#5	-40	537.9	C-5	+47
29	524.0	C-5	+2	520.0	C-5	-11
30	507.1	B-4	+45	503.2	B-4	+32
31	491.3	B-4	-9	487.5	B-4	-23

shapes 6, 7, 9, 10

pitch	NTSC	note	cent	PAL	note	cent
0	1014.2	B-5	+45	1006.5	B-5	+32
1	507.1	B-4	+45	503.2	B-4	+32
2	338.1	E-4	+43	335.5	E-4	+30
3	253.5	B-3	+45	251.6	B-3	+32
4	202.8	G#3	-42	201.3	G-3	+45
5	169.0	E-3	+43	167.7	E-3	+30
6	144.9	D-3	-23	143.8	D-3	-37
7	126.8	B-2	+42	125.8	B-2	+32
8	112.7	A-2	+42	111.8	A-2	+28
9	101.4	G#2	-41	100.6	G-2	+45
10	92.2	F#2	-6	91.5	F#2	-19
11	84.5	E-2	+43	83.9	E-2	+31
12	78.0	D#2	+4	77.4	D#2	-9
13	72.4	D-2	-24	71.9	D-2	-37
14	67.6	C#2	-44	67.1	C-2	+44
15	63.4	B-1	+46	62.9	B-1	+32
16	59.7	A#1	+41	59.2	A#1	+26
17	56.3	A-1	+39	55.9	A-1	+27
18	53.4	G#1	+48	53.0	G#1	+35
19	50.7	G#1	-41	50.3	G-1	+45
20	48.3	G-1	-25	47.9	G-1	-39
21	46.1	F#1	-4	45.7	F#1	-20
22	44.1	F-1	+16	43.8	F-1	+4
23	42.3	E-1	+44	41.9	E-1	+28
24	40.6	E-1	-26	40.3	E-1	-39
25	39.0	D#1	+4	38.7	D#1	-9
26	37.6	D-1	+41	37.3	D-1	+27
27	36.2	D-1	-24	35.9	D-1	-38
28	35.0	C#1	+19	34.7	C#1	+5
29	33.8	C#1	-42	33.5	C-1	+42
30	32.7	C-1	0.0	32.5	C-1	-11
31	31.7	B-0	+44	31.5	B-0	+33

shapes 8

pitch	NTSC	note	cent	PAL	note	cent
0	61.5	B-1	-6	61.1	B-1	-18
1	30.8	B-0	-6	30.5	B-0	-22
2	20.5	E-0	-8	20.4	E-0	-17
3	15.4			15.3
4	12.3			12.2
5	10.3			10.2
6	8.8			8.7
7	7.7			7.6
8	6.8			6.8
9	6.2			6.1
10	5.6			5.6
11	5.1			5.1
12	4.7			4.7
13	4.4			4.4
14	4.1			4.1
15	3.8			3.8
16	3.6			3.6
17	3.4			3.4
18	3.2			3.2
19	3.1			3.1
20	2.9			2.9
21	2.8			2.8
22	2.7			2.7
23	2.6			2.5
24	2.5			2.4
25	2.4			2.3
26	2.3			2.3
27	2.2			2.2
28	2.1			2.1
29	2.0			2.0
30	2.0			2.0
31	1.9			1.9

shapes 12, 13

pitch	NTSC	note	cent	PAL	note	cent
0	5240.0	E-8	-11	5200.0	E-8	-25
1	2620.0	E-7	-11	2600.0	E-7	-25
2	1746.6	A-6	-14	1733.3	A-6	-27
3	1310.0	E-6	-11	1300.0	E-6	-25
4	1048.0	C-6	+2	1040.0	C-6	-11
5	873.3	A-5	-14	866.7	A-5	-27
6	748.6	F#5	+20	742.9	F#5	+7
7	655.0	E-5	-12	650.0	E-5	-25
8	582.2	D-5	-16	577.8	D-5	-29
9	524.0	C-5	+2	520.0	C-5	-11
10	476.4	A#4	+39	472.7	A#4	+23
11	436.7	A-4	-13	433.3	A-4	-27
12	403.1	G-4	+48	400.0	G-4	+34
13	374.3	F#4	+20	371.4	F#4	+6
14	349.3	F-4	0.0	346.7	F-4	-13
15	327.5	E-4	-11	325.0	E-4	-25
16	308.2	D#4	-17	305.9	D#4	-30
17	291.1	D-4	-16	288.9	D-4	-29
18	275.8	C#4	-9	273.7	C#4	-22
19	262.0	C-4	+3	260.0	C-4	-11
20	249.5	B-3	+18	247.6	B-3	+5
21	238.2	A#3	+37	236.4	A#3	+24
22	227.8	A#3	-40	226.1	A-3	+47
23	218.3	A-3	-14	216.7	A-3	-27
24	209.6	G#3	+15	208.0	G#3	+2
25	201.5	G-3	+47	200.0	G-3	+34
26	194.1	G-3	-17	192.6	G-3	-31
27	187.1	F#3	+19	185.7	F#3	+6
28	180.7	F#3	-41	179.3	F-3	+45
29	174.7	F-3	+1	173.3	F-3	-13
30	169.0	E-3	+43	167.7	E-3	+30
31	163.8	E-3	-11	162.5	E-3	-25

shapes 14, 15

pitch	NTSC	note	cent	PAL	note	cent
0	338.1	E-4	+43	335.5	E-4	+30
1	169.0	E-3	+43	167.7	E-3	+30
2	112.7	A-2	+42	111.8	A-2	+28
3	84.5	E-2	+43	83.9	E-2	+31
4	67.6	C#2	-44	67.1	C-2	+44
5	56.3	A-1	+39	55.9	A-1	+27
6	48.3	G-1	-25	47.9	G-1	-39
7	42.3	E-1	+44	41.9	E-1	+28
8	37.6	D-1	+41	37.3	D-1	+27
9	33.8	C#1	-42	33.5	C-1	+42
10	30.7	B-0	-11	30.5	B-0	-22
11	28.2	A-0	+44	28.0	A-0	+31
12	26.0	G#0	0.0	25.8	G#0	-13
13	24.1	G-0	-29	24.0	G-0	-36
14	22.5	F#0	-46	22.4	F-0	+46
15	21.1	E-0	+42	21.0	E-0	+33
16	19.9	D#0	+42	19.7	D#0	+25
17	18.8	D-0	+40	18.6	D-0	+20
18	17.8	C#0	+45	17.7	C#0	+36
19	16.9	C#0	-44	16.8	C-0	+44
20	16.1	C-0	-30	16.0	C-0	-40
21	15.4			15.2
22	14.7			14.6
23	14.1			14
24	13.5			13.4
25	13.0			12.9
26	12.5			12.4
27	12.1			12
28	11.7			11.6
29	11.3			11.2
30	10.9			10.8
31	10.6			10.5

reference: Atari 2600 VCS Sound Frequency and Waveform Guide