A wide, glassy bass is the sound a lot of melodic dubstep lives or dies on. It should feel huge across the stereo field and still punch through a mono club system. Those two goals fight each other, so most people pick one and lose the other. Here is the order we work in so we get both.
//Start narrow, in mono
We build the core bass in mono first. One oscillator, no stereo tricks yet. If it does not sound strong in mono, no amount of widening will save it later. Widening a weak sound just spreads the weakness around. So we get the note, the movement, and the tone right while the whole thing is collapsed to the center.
//Layer for a job, not for a pile
A glassy bass is usually two or three layers, each doing one job.
- A sub layer, a clean sine, owns everything below about 90 Hz. This one stays dead center, always.
- A mid layer carries the character, the growl or the pluck. This is where the glass lives.
- An optional top layer adds bite and air above 2 kHz so it cuts on small speakers.
Keep each layer on its own channel. When you can solo and mute the jobs separately, the mix stops being a guessing game.
//Where the glass comes from
The glassy quality is mostly the mid layer. We reach for a few cents of detune, a little unison, and a slow movement on the filter or the wavetable position so the tone shifts across the bar instead of sitting still. A touch of a metallic or bell-like wavetable in the mix gives it that crystalline edge. Do not overdo the unison. Past a certain point it turns to mush and the pitch gets unstable.
//Widen the top, protect the bottom
This is the part people get wrong. Stereo width on a bass should only happen in the highs. The low end stays mono or it falls apart on a club rig and disappears on a phone.
So we put a stereo imager or a mid-side EQ on the bass and only widen above roughly 300 Hz. Everything below that we collapse to mono, hard. Now the glass spreads wide while the weight stays solid and centered. Check it on a mono button often. If the bass vanishes in mono, your low end is out of phase and you need to pull the widening down.
//Sit it in the mix
Last, we carve room. The kick and the bass cannot both own the same low frequencies. We sidechain the bass to the kick so it ducks out of the way on every hit, and we use an EQ dip on the bass where the kick lives. Small moves. The goal is for the kick to feel like it is punching a hole and the bass to fill the hole right after.
That is the whole recipe. Mono core, layered jobs, glass in the mids, width only up top, and room carved against the kick. Do those in order and the bass will be wide and solid at the same time instead of one or the other.