TL072 Low Noise Dual JFET Op-Amp IC (DIP-8)

Where the LM358 trades off some noise performance for simplicity and single-supply convenience, the TL072 goes the other direction, using JFET inputs to achieve very high input impedance and a noticeably lower noise floor, at the cost of typically needing a dual (split) supply to perform at its best. That makes it the preferred chip for audio preamp and mixer stages, active filter designs in signal-processing circuits, and any analog front-end where picking up a weak, high-impedance signal cleanly matters more than simple single-rail convenience. Many DIY audio pedal and synthesizer projects specifically call out the TL072 by name because its particular noise and distortion characteristics are well understood and considered pleasant in the audio hobby community.