Daz claims that he originally produced "Ain't No Fun" and "Serial Killa"

[TraceOneInfinite]

that's literally what i said ..

barney rubble came in when there was already a drum loop (done by daz) with nate's vocals on it

then he and dre sat down and started to construct the melodies, grooves, and overall instrumentation .. barney plays, dre guides

then dre takes all of that and makes it a song after everybody leaves

My bad homie, I see it now, had to re-read it (working again now after being in the Arab Gulf for like 10 years — my brains been pretty scrambled for a while now and especially this week)

[Sccit]

My bad homie, I see it now, had to re-read it (working again now after being in the Arab Gulf for like 10 years — my brains been pretty scrambled for a while now and especially this week)

no doubt

[b.laden]

obviously  its true except for the keyboards . typical Daz drum machine sound pattern and bass .
the guitar on aint no fun  is probably an old band sample  rewritten by dre dre . the keyboard's melody  probably  Dre
but the structure of the song is the drum and the bass so Daz is right