Wave Tone Constant Clean Hum Random Pitch Bend 50
https://elements.envato.com/wave-tone-constant-clean-hum-random-pitch-bend-50-EZFENPA
Free
Wave Tone Constant Clean Hum Random Pitch Bend 52
https://elements.envato.com/wave-tone-constant-clean-hum-random-pitch-bend-52-RXB6KHC
Free