This technique dates back to when I was doing live gigs with Brian Hardgroove from Public Enemy—me on guitar, him on drums. Since there was no bass player, we needed a way to fill out the bottom end. I’ve come up with a bunch of ways to do that over the years, but the technique presented here is the easiest one yet to implement. We’ll extract a bass line from an existing guitar track, without using MIDI or virtual instruments—here’s how.
Start by copying the guitar’s audio to a new track, which will become our faux bass track. Call up the Inspector, and transpose the faux bass track down by -12 semitones (Fig. 1). This technique works best with relatively articulated guitar notes, not rhythm guitar chords.
Now, it may seem like transposing down an octave is enough, and we can all go home now. No! The faux bass track needs three processors to sound right (Fig. 2).
But as they always say, the proof is in the pudding. However, since we’re not providing a recipe about how to make pudding, check out the audio example instead.
The first two measures are the guitar by itself, while the second two measures have the faux bass playing along. Pretty cool, eh? Oh…and if you’re in a Cream tribute band, this will definitely come in handy for “Sunshine of Your Love.” Have a great weekend!