1) Since record labels generally haven't given an advance to a new artist for a decade, almost all albums and Youtubes are now done "in your room."
2) The Yamaha AG03 is a mixing console more intended for live gigs. If you're mainly doing home studio recoding, then most people get a Focusrite 2i2 or Yamaha/Steinberg UR22 and do mixing in the DAW (computer program.) The UR22 has MIDI-in and out.
Synths often have a built-in audio interface for microphones or guitars, though sometimes without phantom power.
Otherwise, the how-to is pretty typical of how it's done. Note that the author was already quite a musician, having been in a band. YMMV!
2) The Yamaha AG03 is a mixing console more intended for live gigs. If you're mainly doing home studio recoding, then most people get a Focusrite 2i2 or Yamaha/Steinberg UR22 and do mixing in the DAW (computer program.) The UR22 has MIDI-in and out.
Synths often have a built-in audio interface for microphones or guitars, though sometimes without phantom power.
Otherwise, the how-to is pretty typical of how it's done. Note that the author was already quite a musician, having been in a band. YMMV!