http://www.rogtronics.net/files/ebooks/

http://loliel.narod.ru/DIY.pdf

http://www.allaboutcircuits.com

https://www.muffwiggler.com

http://www.ti.com/lit/an/sloa093/sloa093.pdf

http://sound.whsites.net/projects.htm

http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=6

https://www.muffwiggler.com/forum/viewtopic.php?t=2795

https://forum.allaboutcircuits.com/threads/3-band-equalizer-last-hurdle.46914/ https://forum.allaboutcircuits.com/attachments/baxandall-tone-controls3-png.25392/ https://forum.allaboutcircuits.com/threads/3-band-equalizer.91168/page-3

Aprender

https://www.youtube.com/playlist?list=PLXnFQqfHz_iEV6EkjumBGEv6O-NMyKyVk&feature=mh_lolz

http://www.falstad.com/circuit/e-index.html

https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-002-circuits-and-electronics-spring-2007/video-lectures/

https://www.edx.org/course/circuits-electronics-1-basic-circuit-mitx-6-002-1x-0

Filters

http://sim.okawa-denshi.jp/en/Fkeisan.htm

La mayor parte sacados de aquí https://www.muffwiggler.com/forum/viewtopic.php?t=2795&postdays=0&postorder=asc&start=50