* SPICE netlist
R1 N003 KEY 100K
XU1 0 N003 VCC VEE N004 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R2 N004 N003 1.8K
R3 N003 TUNE 100K
R4 N003 LFO 100K
V1 VCC 0 5V
V2 VEE 0 -4V
V3 KEY 0 2.833
Q1 N007 N004 N010 0 NPN
Q2 N001 0 N010 0 NPN
XU3 0 N007 VCC VEE N011 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
C1 N011 N007 1nF
R5 N010 N011 1K
R6 VCC N007 1Meg
V4 NC_01 0 PULSE(0 5 0 1ms 0 0 0)
XU4 0 N001 VCC VEE INPUT level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R7 INPUT N001 30K
XU2 N008 N002 VCC 0 TRIANGLE level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R8 N002 INPUT 100K
R9 N008 INPUT 47K
R10 N012 N002 47K
R11 0 N008 47K
Q3 N012 N013 0 0 NPN
C2 TRIANGLE N002 3.8863nF
XU5 N009 TRIANGLE VCC 0 SQUARE level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R12 SQUARE N009 100K
R13 N009 VREF 47K
V5 LFO 0
XU6 NC_02 N006 VCC 0 N005 level2 Avol=1Meg GBW=10Meg Slew=10Meg Ilimit=25m Rail=0 Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R14 N005 N006 14K
R15 N006 0 1K
R16 SQUARE N013 100K
V6 VREF 0 2.5V
.tran 0 1000ms 0 10us startup uic

* LTspice schematic (.asc)
Version 4
SHEET 1 3936 656
WIRE -112 -248 -144 -248
WIRE -16 -248 -32 -248
WIRE 688 -232 544 -232
WIRE 848 -232 752 -232
WIRE 1184 -232 848 -232
WIRE -896 -168 -928 -168
WIRE -784 -168 -816 -168
WIRE 1872 -168 1872 -184
WIRE 1968 -136 1904 -136
WIRE -144 -120 -144 -248
WIRE -144 -120 -352 -120
WIRE -112 -120 -144 -120
WIRE 1840 -120 1760 -120
WIRE -480 -104 -480 -136
WIRE -480 -104 -624 -104
WIRE -16 -104 -16 -248
WIRE -16 -104 -48 -104
WIRE 144 -104 -16 -104
WIRE 224 -104 144 -104
WIRE 304 -104 224 -104
WIRE 544 -104 544 -232
WIRE 544 -104 384 -104
WIRE 688 -104 544 -104
WIRE -112 -88 -176 -88
WIRE 848 -88 848 -232
WIRE 848 -88 752 -88
WIRE 1008 -88 848 -88
WIRE -480 -72 -480 -104
WIRE -352 -72 -352 -120
WIRE 688 -72 432 -72
WIRE 1120 -72 1072 -72
WIRE 1184 -72 1120 -72
WIRE 1008 -56 960 -56
WIRE -1120 -40 -1168 -40
WIRE -992 -40 -1040 -40
WIRE -928 -40 -928 -168
WIRE -928 -40 -992 -40
WIRE -896 -40 -928 -40
WIRE -176 -40 -176 -88
WIRE -784 -24 -784 -168
WIRE -784 -24 -832 -24
WIRE -544 -24 -784 -24
WIRE -256 -24 -288 -24
WIRE -896 -8 -928 -8
WIRE 224 8 224 -104
WIRE 304 8 224 8
WIRE 432 8 432 -72
WIRE 432 8 384 8
WIRE 720 8 720 -56
WIRE 1760 8 1760 -120
WIRE 1824 8 1760 8
WIRE 1968 8 1968 -136
WIRE 1968 8 1904 8
WIRE -416 24 -480 24
WIRE -352 24 -416 24
WIRE -256 24 -256 -24
WIRE -928 40 -928 -8
WIRE -1120 56 -1168 56
WIRE -992 56 -992 -40
WIRE -992 56 -1040 56
WIRE 432 56 432 8
WIRE 544 56 544 -104
WIRE 848 56 784 56
WIRE 960 56 960 -56
WIRE 960 56 928 56
WIRE 992 56 960 56
WIRE 1120 56 1120 -72
WIRE 1120 56 1072 56
WIRE 1760 56 1760 8
WIRE -624 120 -624 -104
WIRE -592 120 -624 120
WIRE -496 120 -528 120
WIRE -416 120 -416 24
WIRE -1120 152 -1168 152
WIRE -992 152 -992 56
WIRE -992 152 -1040 152
WIRE 208 168 128 168
WIRE 544 168 544 136
WIRE 1760 168 1760 136
WIRE 128 216 128 168
WIRE 784 216 608 216
WIRE 1120 216 1120 56
WIRE 1120 216 864 216
WIRE -624 248 -624 120
WIRE -592 248 -624 248
WIRE -496 264 -496 120
WIRE -496 264 -528 264
WIRE -416 264 -416 200
WIRE -416 264 -496 264
WIRE -592 280 -624 280
WIRE -624 296 -624 280
WIRE 432 296 432 136
WIRE 544 296 544 264
WIRE 544 296 432 296
WIRE 128 328 128 296
WIRE 432 328 432 296
FLAG -864 -56 VCC
FLAG -864 8 VEE
FLAG -928 40 0
FLAG -1440 -232 0
FLAG -1344 -232 0
FLAG -1344 -312 VEE
FLAG -1440 -312 VCC
FLAG -1168 -40 KEY
FLAG -1168 56 TUNE
FLAG -1168 152 LFO
FLAG -1856 136 0
FLAG -560 296 VEE
FLAG -560 232 VCC
FLAG -624 296 0
FLAG -256 24 0
FLAG -480 -216 VCC
FLAG -1744 136 0
FLAG -1856 56 KEY
FLAG -80 -72 VEE
FLAG -80 -136 VCC
FLAG -176 -40 0
FLAG 720 -120 VCC
FLAG 432 328 0
FLAG 1040 -104 VCC
FLAG -1968 136 0
FLAG -1968 56 LFO
FLAG 720 8 0
FLAG 1040 -40 0
FLAG 1872 -104 VCC
FLAG 1872 -184 0
FLAG 1760 168 0
FLAG 128 328 0
FLAG 1184 -72 SQUARE
FLAG 1184 -232 TRIANGLE
FLAG 784 56 VREF
FLAG 208 168 VREF
FLAG 144 -104 INPUT
SYMBOL res -1024 -56 R90
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL Opamps\\UniversalOpamp2 -864 -24 R0
SYMATTR InstName U1
SYMBOL res -800 -184 R90
SYMATTR InstName R2
SYMATTR Value 1.8K
SYMBOL res -1024 40 R90
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL res -1024 136 R90
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL voltage -1440 -328 R0
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL voltage -1344 -328 R0
SYMATTR InstName V2
SYMATTR Value -4V
SYMBOL voltage -1856 40 R0
SYMATTR InstName V3
SYMATTR Value 2.833
SYMBOL npn -544 -72 R0
SYMATTR InstName Q1
SYMBOL npn -288 -72 M0
SYMATTR InstName Q2
SYMBOL Opamps\\UniversalOpamp2 -560 264 R0
SYMATTR InstName U3
SYMBOL cap -528 104 R90
SYMATTR InstName C1
SYMATTR Value 1nF
SYMBOL res -432 104 R0
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL res -496 -232 R0
SYMATTR InstName R6
SYMATTR Value 1Meg
SYMBOL voltage -1744 40 R0
SYMATTR InstName V4
SYMATTR Value PULSE(0 5 0 1ms 0 0 0)
SYMBOL Opamps\\UniversalOpamp2 -80 -104 R0
SYMATTR InstName U4
SYMBOL res -16 -264 R90
SYMATTR InstName R7
SYMATTR Value 30K
SYMBOL Opamps\\UniversalOpamp2 720 -88 R0
SYMATTR InstName U2
SYMBOL res 400 -120 R90
SYMATTR InstName R8
SYMATTR Value 100K
SYMBOL res 400 -8 R90
SYMATTR InstName R9
SYMATTR Value 47K
SYMBOL res 560 152 R180
SYMATTR InstName R10
SYMATTR Value 47K
SYMBOL res 448 152 R180
SYMATTR InstName R11
SYMATTR Value 47K
SYMBOL npn 608 168 M0
SYMATTR InstName Q3
SYMBOL cap 752 -248 R90
SYMATTR InstName C2
SYMATTR Value 3.8863nF
SYMBOL Opamps\\UniversalOpamp2 1040 -72 R0
SYMATTR InstName U5
SYMBOL res 1088 40 R90
SYMATTR InstName R12
SYMATTR Value 100K
SYMBOL res 944 40 R90
SYMATTR InstName R13
SYMATTR Value 47K
SYMBOL voltage -1968 40 R0
SYMATTR InstName V5
SYMATTR Value ""
SYMBOL Opamps\\UniversalOpamp2 1872 -136 M180
SYMATTR InstName U6
SYMBOL res 1920 -8 R90
SYMATTR InstName R14
SYMATTR Value 14K
SYMBOL res 1744 40 R0
SYMATTR InstName R15
SYMATTR Value 1K
SYMBOL res 880 200 R90
SYMATTR InstName R16
SYMATTR Value 100K
SYMBOL voltage 128 200 R0
SYMATTR InstName V6
SYMATTR Value 2.5V