Because of their long, curvy waveforms, low frequencies experience phase attenuation more profoundly than other areas of the spectrum. You may want to high-pass your square wave so that it gives the bass line that extra grit without stepping on the feet of your sine’s big clear lows. Additionally, many producers like to make low-end seem fatter by using stereo widening effects. Use these carefully as the phase interactions between the low end of each stereo side can cause destructive interference. Use the mono/stereo switch on your DAW’s master track to check whether your low end survives when everything’s running through the center channel.
“It was, for a generation raised on Time-Life’s canon of Music’s Greatest Masterpieces, a symbol of an unfathomable past filled with difficult musical mountains — each a challenge to be conquered with the guidance of academic Sherpas dispensing ‘music appreciation.’ Mythically, it had found its role. It was the Monad that contained within it the secret formulas for all musical creation to follow, the musical equivalent of Kubrick’s black monolith or of Stonehenge.”