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Bitwig 4-Stage Modulator - ADSR Envelope based Signals

Bitwig Guide | Apr 13, 2022

The 4-Stage modulator in Bitwig Studio is a flexible ADSR envelope with four customizable phases, allowing you to modulate parameters like cutoff with precise control over timing, strength, and curve shape. It can be switched between polyphonic and monophonic modes, so each note can have its own envelope or share a single one, and includes features like bipolar mode, looping, and modulation amount adjustment. This makes it especially powerful for creative sound design, letting you combine it with other modulators like LFOs for complex modulation routings.

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Short Overview

I like using the 4-Stage modulator because it adds a flexible ADSR envelope with 4-Stages, letting me shape modulation in detail. I can set the timing either in seconds for freeform shaping or in quarter notes for rhythmic precision, and adjust curves between points for more character. If I need, I can make it bipolar for both positive and negative modulation, and with its polyphonic mode, each played note gets its own envelope. The looping options and quick access to modulation amount make it easy to get the movement I want, whether I’m working with a simple sound or a complex chord.

Introduction to the 4-Stage Modulator in Bitwig Studio

In this video, I explored the functionalities and applications of the "4-Stage" modulator in Bitwig Studio. The 4-Stage modulator is essentially an advanced envelope generator, similar in some ways to the well-known ADSR (Attack, Decay, Sustain, Release) envelope, but it offers a few extra stages and a higher level of control and flexibility. Here’s an in-depth overview of its features and how to utilize them effectively in music production.

Overview of Envelope Generators

Before diving into the 4-Stage, it's helpful to understand what an envelope generator is. In audio synthesis, envelopes are modulators that shape some parameter over time, typically used to control volume, filter frequency, or other parameters as a note plays. The classic ADSR stands for Attack, Decay, Sustain, and Release, each defining a portion of the time-based modulation. Bitwig provides separate envelopes, such as FEG (Filter Envelope Generator) and AEG (Amplitude Envelope Generator), which can be used for typical envelope duties.

Why Use the 4-Stage Modulator?

While basic envelopes serve many uses, there are scenarios where more complexity is needed. The 4-Stage modulator allows for an additional stage (hold), offers custom timing and curve controls, and can be used in parallel with the built-in envelopes for more advanced modulation tasks.

Understanding the 4-Stages

Each stage is visualized on the screen, and numerical readouts show the current strength and timing.

Flexible Timing Options

One standout feature is the ability to choose timing modes for envelope segments. You can set times in absolute seconds, making the envelope independent of the song’s tempo, or you can snap timing to rhythmic values such as quarter notes. This lets you keep modulations perfectly synchronized with the musical grid if desired.

Curve Editing and Bending

Between stage points, you can adjust the curvature (bending) of the transitions, creating sharp or smooth changes between segments. This enables more expressive and tailored shapes for your modulations, allowing you to move beyond straight-line segments typical of simpler envelopes.

Bipolar Mode

Normally, modulation moves in one direction (positive). By enabling Bipolar mode, the modulation can move positively and negatively relative to the target’s initial setting. This is especially useful for parameters like filter cutoff, where you might want the envelope to dip below the starting value as well as rise above it.

Polyphonic and Monophonic Application

The 4-Stage envelope can operate in polyphonic or monophonic mode:

Looping Functionality

You can loop any segment of the 4-Stage envelope, whether just the attack, attack and decay, or the entire sequence. When looping is enabled, the envelope continuously cycles through the chosen stages for as long as the note is held, a feature useful for evolving or rhythmic modulations.

Visual Feedback with Voice Dots

When multiple notes are played in polyphonic mode, the envelope displays multiple dots that visibly represent the position of each voice’s envelope in real time. This makes it easy to see how each note is being modulated individually.

Modulation Amount Control

There’s a dedicated slider to adjust how much the envelope modulates the target parameter. This can be set directly via the envelope panel or on the modulated parameter itself. The polarity of modulation can be inverted, reversing the modulation direction, which is helpful when layering multiple modulators or aiming for more complex mod matrix setups.

Modulating the Modulation Amount

Bitwig allows you to modulate the modulation amount itself, creating dynamic changes in how strongly the envelope affects its target. For example, assigning an LFO (Low Frequency Oscillator) to the modulation amount knob results in an envelope whose influence is continuously varied, opening up a wide array of creative possibilities.

Conclusion

The 4-Stage modulator in Bitwig Studio provides a highly flexible, visual, and musically useful tool for shaping sounds and modulations. With features like free versus tempo-synced timing, per-voice operation, curve control, bipolar modulation, looping, and dynamic modulation amount, it stands out as a versatile choice for both simple and highly complex modulation tasks. Understanding and mastering this modulator allows for more expressive and intricate sound design in any production workflow.

Full Video Transcription

This is what im talking about in this video. The text is transcribed by Whisper, so it might not be perfect. If you find any mistakes, please let me know.
You can also click on the timestamps to jump to the right part of the video, which should be helpful.

Click to expand Transcription

[00:00:00] So the first modulator we want to look at is the 4-Stage.
[00:00:05] Looks like this.
[00:00:06] It's an ADSR, it's an envelope.
[00:00:09] Inside the pulley since we have already two envelopes here, FEG and AEG, we can utilize
[00:00:14] to modulate something.
[00:00:16] We can just click on here on the board itself or on the symbol, the icon.
[00:00:20] But if you need actually three envelopes, then you can utilize here a 4-Stage or some
[00:00:25] different modulator you want to use.
[00:00:28] And we have here with the 4-Stage, 4-Stages.
[00:00:31] So actually we have the attack phase here from zero to one, one to two is the decay phase.
[00:00:35] We have the hold phase from two to three and three to four is basically the release phase.
[00:00:41] You can see this also here showing up down below as numbers.
[00:00:47] So you can see the amount or the strength basically and the timing which is down below
[00:00:52] here.
[00:00:53] And the timing setting is a bit special because you can switch between seconds.
[00:00:57] So you can change here the point or the timing in seconds, which means it's completely free
[00:01:06] from the rhythm or from the tempo you are choosing in Bitwig Studio or you can switch
[00:01:12] it to a quarter note.
[00:01:14] So everything you move on here is snapping to the beat grid in quarter notes.
[00:01:20] So it makes it pretty easy to make it rhythmically correct in a way.
[00:01:28] Then you have here these dots in between where you can change the curve or the bending between
[00:01:32] the dots, which is also nice to have.
[00:01:36] And we have a feature to make it bipolar.
[00:01:41] So when we modulate here, for instance, the cutoff, you can see we only modulate here in
[00:01:48] the positive direction, only modulates upwards.
[00:01:54] And if you switch it to bipolar mode, you can also go into a negative range.
[00:02:00] And now we go also below here the modulation point, right?
[00:02:04] So you can see it goes into the minus range.
[00:02:13] So pretty helpful.
[00:02:14] Then we have this holy knob here, which is also a bit special, which means this curve
[00:02:19] is applied to every voice.
[00:02:21] So in this instance here, we have just one note playing at the time.
[00:02:26] But when we play, for instance, some chords, we can now apply this curve or this ADSR envelope
[00:02:36] to every note separately.
[00:02:38] And when we start to see a different points in time, also these envelopes basically start
[00:02:49] with each note at the time, or one modulator is added to one note at a time.
[00:02:56] For each voice, you have one modulator.
[00:02:59] This basically means this poly thing here, if you turn this off, then only one stage
[00:03:05] or one 4-Stage is applied to all of these three notes together.
[00:03:14] It's just one curve applied to all three notes.
[00:03:16] So this is pretty important to know.
[00:03:19] Then we have your looping functions, which is also nice.
[00:03:22] So when you switch this here one to one, you basically only loop the attack phase.
[00:03:26] So from zero to one, if you switch to oneophonic mode, then you can also loop here from two
[00:03:39] to two, which is the attack and decay phase, or three, which includes the whole phase.
[00:03:45] And also we can loop the whole 4-Stage sequence here.
[00:03:59] And you can see also here in this graph that we have now three dots, which means you visualize
[00:04:06] or you have a visual for each different voice that's currently playing.
[00:04:12] We have three dots because we have three notes or three voices.
[00:04:27] So there's one slider left.
[00:04:29] This is this one here.
[00:04:30] And this is basically just an amount.
[00:04:32] So you can change the amount, how much you modulate here, this cutoff knob.
[00:04:37] You can change this here by doing this on the cutoff knob itself, as you can see here.
[00:04:43] But if you don't want to actually click this modulator handle and then change it here,
[00:04:47] you can just utilize this one here, or you can reverse it or apply it basically to modulation
[00:05:02] in the opposite way.
[00:05:04] It's also handy when you utilize multiple modulators, for instance, use an LFO here.
[00:05:13] And you want to modulate the amount of this 4-Stage, so you're to maybe zero percent
[00:05:19] and then you add LFO to that one.
[00:05:23] You can see we change now the modulation amount here with the LFO and then the ADSR is modulating
[00:05:29] the cutoff.