What amp settings do you need for Oasis?
It depends on the song. On a generic five-knob amp, Supersonic starts at Gain 5, Bass 5, Middle 6, Treble 6, Presence 5, Reverb 2; Live Forever starts at Gain 5.5, Bass 5, Middle 7, Treble 6, Presence 5, Reverb 2. These are starting points, not the settings used on the records.
What gear did Oasis use on these songs?
Supersonic: Epiphone Les Paul Standard (Noel); Gibson SG (Bonehead); Watkins Dominator MkIII combo (Noel); Marshall JCM900 (Bonehead). Live Forever: A Les Paul, probably the one Johnny Marr lent Noel; Marshall with a Vox AC30, or a Marshall Valvestate and a Watkins Dominator (accounts differ). Each song page lists the sources behind its rig.
Can you get the Oasis tone without the original gear?
Yes. What carries these sounds is the gain structure, the EQ curve, the pickup position and the order of the effects, and all four can be rebuilt on other equipment. Tonelify rewrites each starting point for the amp and guitar you own.