NE5532: NE5532, LM833, RC4580 and MC33078 all now the same die? - Audio forum - Audio - TI E2E support forums
https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1652528/ne5532-ne5532-lm833-rc4580-and-mc33078-all-now-the-same-die