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Harmonic Sweetener

Schematic

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TL074 count: drawing shows six op-amp sections with repeated pin numbers, read as two chips

Ref	Value	Normalized	Type	Notes
Resistors 10
×2	1M	1M		input and output pulldowns; read from the schematic by eye
×2	100k	100k		input and feedback of input buffer; read from the schematic by eye
×7	10k	10k		mixer inputs, feedback and output; clipper input; inverter input and feedback; read from the schematic by eye
×2	4k7	4.7k		marked * on the drawing: replace with a 10k dual-ganged pot for a tunable filter; read from the schematic by eye
×2	4k7	4.7k		second band-pass stage feedback and to ground; read from the schematic by eye
×1	2k2	2.2k		read from the schematic by eye
×1	15k	15k		read from the schematic by eye
×2	22k	22k		read from the schematic by eye
×1	1M	1M		marked ** on the drawing: clipper feedback; can be a 2.5M pot for a drive option; read from the schematic by eye
×2	100	100		supply filter; read from the schematic by eye
Capacitors 4
×1	1uF	1u		electrolytic input coupling; read from the schematic by eye
×4	4n7	4.7n		read from the schematic by eye
×1	10pF	10p		read from the schematic by eye
×3	10uF	10u		electrolytic: output coupling and two supply filters; read from the schematic by eye
ICs 1
×2	TL074	TL074		drawing says TL074 with 3 of the 4 amps used; six op-amp sections drawn (pins 1-3 and 12-14 appear twice), so two chips; read from the schematic by eye
Potentiometers 1
×1	10k	10k	Potentiometer	blend of the clipped signal into the mixer; no name given; read from the schematic by eye
LEDs 1
×2	LED	LED		anti-parallel clipping pair; note suggests red LEDs; read from the schematic by eye