LFO 1/2T 1/4T 1/8T 1/16T......

[Waxx]

Hi, i'm making a stereo MidiboxSid, it's almost finished, just need a box, bankstick, dout module, and a second din module.

I've started to play with my Midiboxsid, and i've got a problem with the LFO's, it seems the LFO's don't do 1/4T 1/8T 1/16T etc, or 1/2P 1/4P etc

It just does the regular 1 1/2 1/4.....

Are the LFO synced by the SID chip or is it in the mios in the pic ?

Can it be added in the mios ?

Thank you

(I've started to look at the asm files, and for now i don't find a part with LFO)

[nILS]

The LFOs are generated in the PIC. So you just need to dig a little deeper in the source ;)

\src\sid_se_l.inc might be helpful as a start

[TK.]

I added your request to the Wishlist (end of the CHANGELOG.txt

sid_lfo_table.inc has to be enhanced (see end of this file) + the preset offset in sid_se_l.inc (search for "if LFO synched via clock, replace 245-255 by MIDI clock optimized incrementers")

In addition the appr. CS code + Rutger's and Nils Editor have to be adapted.

And the documentation has to be overworked of course.

Best Regards, Thorsten.

[Waxx]

Hi everybody !!!! i'm trying to add the new lfo's value to the sidbox :

So, i started by searching the real values, i'm not shure of it:

1/2T=1/3=0.333333333

1/4T=1/6=0.166666667

1/8T=1/12=0.08333333

1/16T=1/24=0.0416667

1/32T=1/48=0.0208333

1/64T=1/96=0.0104167

1/2.=3/4=0.75

1/4.=3/8=0.375

1/8.=3/16=0.1875

1/16.=3/32=0.09375

1/32.=3/64=0.046875

1/64.=3/128=0.0234375

Edit the sid_lfo_table.inc at the end, i take 1024/divisor, exemple: 1024/(1/2)= 2048, 1024/(1/16T)=1024/(1/24)= 24576.

;; alternative table for MIDI clock

;; (overrules entries 231-255 of normal LFO table if SID_I_LFO_MODE_CLKSYNC flag is set)

SID_LFO_TABLE_MCLK

dw 16 ; 231: 64/1

dw 32 ; 232: 32/1

dw 64 ; 233: 16/1

dw 128 ; 234: 8/1

dw 256 ; 235: 4/1

dw 512 ; 236: 2/1

dw 1024 ; 237: 1/1

dw 1365 ; 238: 1/2.

dw 2048 ; 239: 1/2

dw 3072 ; 240: 1/2T

dw 2731 ; 241: 1/4.

dw 4096 ; 242: 1/4

dw 6144 ; 243: 1/4T

dw 5461 ; 244: 1/8.

dw 8192 ; 245: 1/8

dw 12288 ; 246: 1/8T

dw 10923 ; 247: 1/16.

dw 16384 ; 248: 1/16

dw 24576 ; 249: 1/16T

dw 21845 ; 250: 1/32.

dw 32768 ; 251: 1/32

dw 49152 ; 252: 1/32T

dw 43691 ; 253: 1/64.

dw 65536 ; 254: 1/64

dw 98304 ; 255: 1/64T

After that, edit the sid_se_l.inc file at:

;; if LFO synched via clock, replace 231-255 by MIDI clock optimized incrementers

movlw SID_Ix_LFOx_MODE

BRA_IFCLR PLUSW0, SID_I_LFO_MODE_CLKSYNC, ACCESS, SIDSE_L_LFO_Rate_NoClkSync

SIDSE_L_LFO_Rate_ClkSync

movf IRQ_TMP1, W

addlw -231

bnc SIDSE_L_LFO_Rate_NoClkSyncValues

TABLE_ADDR_MUL_W SID_LFO_TABLE_MCLK, 2

rgoto SIDSE_L_LFO_Rate_ClkSync_Cont

SIDSE_L_LFO_Rate_NoClkSyncValues

SIDSE_L_LFO_Rate_NoClkSync

And now, compil again and upload to the Midibox Sid, for now i'm testing and it's working :D, but i think it could be better to make duplicate values for a better midi control, it's 25 values for 255 midi steps so each value repeats 10 time :

dw 16 ; 1: 64/1

dw 16 ; 2: 64/1

dw 16 ; 3: 64/1

dw 16 ; 4: 64/1

dw 16 ; 5: 64/1

dw 16 ; 6: 64/1

dw 16 ; 7: 64/1

dw 16 ; 8: 64/1

dw 16 ; 9: 64/1

dw 16 ; 10: 64/1

dw 16 ; 11: 64/1

dw 32 ; 12: 32/1

dw 32 ; 13: 32/1

dw 32 ; 14: 32/1

dw 32 ; 15: 32/1

dw 32 ; 16: 32/1

dw 32 ; 17: 32/1

dw 32 ; 18: 32/1

dw 32 ; 19: 32/1

dw 32 ; 20: 32/1

dw 32 ; 21: 32/1

dw 32 ; 22: 32/1

dw 32 ; 23: 32/1

dw 64 ; 24: 16/1

dw 64 ; 25: 16/1

dw 64 ; 26: 16/1

dw 64 ; 27: 16/1

dw 64 ; 28: 16/1

dw 64 ; 29: 16/1

dw 64 ; 30: 16/1

dw 64 ; 31: 16/1

dw 64 ; 32: 16/1

dw 64 ; 33: 16/1

dw 64 ; 34: 16/1

dw 128 ; 35: 8/1

dw 128 ; 36: 8/1

dw 128 ; 37: 8/1

dw 128 ; 38: 8/1

dw 128 ; 39: 8/1

dw 128 ; 40: 8/1

dw 128 ; 41: 8/1

dw 128 ; 42: 8/1

dw 128 ; 43: 8/1

dw 128 ; 44: 8/1

dw 256 ; 45: 4/1

dw 256 ; 46: 4/1

dw 256 ; 47: 4/1

dw 256 ; 48: 4/1

dw 256 ; 49: 4/1

dw 256 ; 50: 4/1

dw 256 ; 51: 4/1

dw 256 ; 52: 4/1

dw 256 ; 53: 4/1

dw 256 ; 54: 4/1

dw 512 ; 55: 2/1

dw 512 ; 56: 2/1

dw 512 ; 57: 2/1

dw 512 ; 58: 2/1

dw 512 ; 59: 2/1

dw 512 ; 60: 2/1

dw 512 ; 61: 2/1

dw 512 ; 62: 2/1

dw 512 ; 63: 2/1

dw 512 ; 64: 2/1

dw 1024 ; 65: 1/1

dw 1024 ; 66: 1/1

dw 1024 ; 67: 1/1

dw 1024 ; 68: 1/1

dw 1024 ; 69: 1/1

dw 1024 ; 70: 1/1

dw 1024 ; 71: 1/1

dw 1024 ; 72: 1/1

dw 1024 ; 73: 1/1

dw 1024 ; 74: 1/1

dw 1365 ; 75: 1/2.

dw 1365 ; 76: 1/2.

dw 1365 ; 77: 1/2.

dw 1365 ; 78: 1/2.

dw 1365 ; 79: 1/2.

dw 1365 ; 80: 1/2.

dw 1365 ; 81: 1/2.

dw 1365 ; 82: 1/2.

dw 1365 ; 83: 1/2.

dw 1365 ; 84: 1/2.

dw 2048 ; 85: 1/2

dw 2048 ; 86: 1/2

dw 2048 ; 87: 1/2

dw 2048 ; 88: 1/2

dw 2048 ; 89: 1/2

dw 2048 ; 90: 1/2

dw 2048 ; 91: 1/2

dw 2048 ; 92: 1/2

dw 2048 ; 93: 1/2

dw 2048 ; 94: 1/2

dw 3072 ; 95: 1/2T

dw 3072 ; 96: 1/2T

dw 3072 ; 97: 1/2T

dw 3072 ; 98: 1/2T

dw 3072 ; 99: 1/2T

dw 3072 ; 100: 1/2T

dw 3072 ; 101: 1/2T

dw 3072 ; 102: 1/2T

dw 3072 ; 103: 1/2T

dw 3072 ; 104: 1/2T

dw 2731 ; 105: 1/4.

dw 2731 ; 106: 1/4.

dw 2731 ; 107: 1/4.

dw 2731 ; 108: 1/4.

dw 2731 ; 109: 1/4.

dw 2731 ; 110: 1/4.

dw 2731 ; 111: 1/4.

dw 2731 ; 112: 1/4.

dw 2731 ; 113: 1/4.

dw 2731 ; 114: 1/4.

dw 4096 ; 115: 1/4

dw 4096 ; 116: 1/4

dw 4096 ; 117: 1/4

dw 4096 ; 118: 1/4

dw 4096 ; 119: 1/4

dw 4096 ; 120: 1/4

dw 4096 ; 121: 1/4

dw 4096 ; 122: 1/4

dw 4096 ; 123: 1/4

dw 4096 ; 124: 1/4

dw 6144 ; 125: 1/4T

dw 6144 ; 126: 1/4T

dw 6144 ; 127: 1/4T

dw 6144 ; 128: 1/4T

dw 6144 ; 129: 1/4T

dw 6144 ; 130: 1/4T

dw 6144 ; 131: 1/4T

dw 6144 ; 132: 1/4T

dw 6144 ; 133: 1/4T

dw 6144 ; 134: 1/4T

dw 5461 ; 135: 1/8.

dw 5461 ; 136: 1/8.

dw 5461 ; 137: 1/8.

dw 5461 ; 138: 1/8.

dw 5461 ; 139: 1/8.

dw 5461 ; 140: 1/8.

dw 5461 ; 141: 1/8.

dw 5461 ; 142: 1/8.

dw 5461 ; 143: 1/8.

dw 5461 ; 144: 1/8.

dw 8192 ; 145: 1/8

dw 8192 ; 146: 1/8

dw 8192 ; 147: 1/8

dw 8192 ; 148: 1/8

dw 8192 ; 149: 1/8

dw 8192 ; 150: 1/8

dw 8192 ; 151: 1/8

dw 8192 ; 152: 1/8

dw 8192 ; 153: 1/8

dw 8192 ; 154: 1/8

dw 12288 ; 155: 1/8T

dw 12288 ; 156: 1/8T

dw 12288 ; 157: 1/8T

dw 12288 ; 158: 1/8T

dw 12288 ; 159: 1/8T

dw 12288 ; 160: 1/8T

dw 12288 ; 161: 1/8T

dw 12288 ; 162: 1/8T

dw 12288 ; 163: 1/8T

dw 12288 ; 164: 1/8T

dw 10923 ; 165: 1/16.

dw 10923 ; 167: 1/16.

dw 10923 ; 168: 1/16.

dw 10923 ; 169: 1/16.

dw 10923 ; 170: 1/16.

dw 10923 ; 171: 1/16.

dw 10923 ; 172: 1/16.

dw 10923 ; 173: 1/16.

dw 10923 ; 174: 1/16.

dw 10923 ; 175: 1/16.

dw 16384 ; 176: 1/16

dw 16384 ; 177: 1/16

dw 16384 ; 178: 1/16

dw 16384 ; 179: 1/16

dw 16384 ; 180: 1/16

dw 16384 ; 181: 1/16

dw 16384 ; 182: 1/16

dw 16384 ; 183: 1/16

dw 16384 ; 184: 1/16

dw 16384 ; 185: 1/16

dw 24576 ; 186: 1/16T

dw 24576 ; 187: 1/16T

dw 24576 ; 188: 1/16T

dw 24576 ; 189: 1/16T

dw 24576 ; 190: 1/16T

dw 24576 ; 191: 1/16T

dw 24576 ; 192: 1/16T

dw 24576 ; 193: 1/16T

dw 24576 ; 194: 1/16T

dw 24576 ; 195: 1/16T

dw 21845 ; 196: 1/32.

dw 21845 ; 197: 1/32.

dw 21845 ; 198: 1/32.

dw 21845 ; 199: 1/32.

dw 21845 ; 200: 1/32.

dw 21845 ; 201: 1/32.

dw 21845 ; 202: 1/32.

dw 21845 ; 203: 1/32.

dw 21845 ; 204: 1/32.

dw 21845 ; 205: 1/32.

dw 32768 ; 206: 1/32

dw 32768 ; 207: 1/32

dw 32768 ; 208: 1/32

dw 32768 ; 209: 1/32

dw 32768 ; 210: 1/32

dw 32768 ; 211: 1/32

dw 32768 ; 212: 1/32

dw 32768 ; 213: 1/32

dw 32768 ; 214: 1/32

dw 32768 ; 215: 1/32

dw 49152 ; 216: 1/32T

dw 49152 ; 217: 1/32T

dw 49152 ; 218: 1/32T

dw 49152 ; 219: 1/32T

dw 49152 ; 220: 1/32T

dw 49152 ; 221: 1/32T

dw 49152 ; 222: 1/32T

dw 49152 ; 223: 1/32T

dw 49152 ; 224: 1/32T

dw 49152 ; 225: 1/32T

dw 43691 ; 226: 1/64.

dw 43691 ; 227: 1/64.

dw 43691 ; 228: 1/64.

dw 43691 ; 229: 1/64.

dw 43691 ; 230: 1/64.

dw 43691 ; 231: 1/64.

dw 43691 ; 232: 1/64.

dw 43691 ; 233: 1/64.

dw 43691 ; 234: 1/64.

dw 43691 ; 235: 1/64.

dw 65536 ; 236: 1/64

dw 65536 ; 237: 1/64

dw 65536 ; 238: 1/64

dw 65536 ; 239: 1/64

dw 65536 ; 240: 1/64

dw 65536 ; 241: 1/64

dw 65536 ; 242: 1/64

dw 65536 ; 243: 1/64

dw 65536 ; 244: 1/64

dw 65536 ; 245: 1/64

dw 98304 ; 246: 1/64T

dw 98304 ; 247: 1/64T

dw 98304 ; 248: 1/64T

dw 98304 ; 249: 1/64T

dw 98304 ; 250: 1/64T

dw 98304 ; 251: 1/64T

dw 98304 ; 252: 1/64T

dw 98304 ; 253: 1/64T

dw 98304 ; 254: 1/64T

dw 98304 ; 255: 1/64T

Sorry for my bad english

And thank you again for all your work

Edited November 26, 2011 by Waxx

[TK.]

For the records: with V2.039 the MIDI Clock Sync feature has been enhanced. The final solution looks a bit different from Waxx' proposal, but it works 100% accurate over long time, even when the LFO isn't reseted via Key Sync because the usage of "uneven values" is avoided.

Best Regards, Thorsten.