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)
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
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.
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
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.