Mutable Instruments Veils
Four transparent VCAs with mixing and offset control
10 HP Eurorack module
Veils is a quad VCA with continuously variable exponential-to-linear response curves, an offset control per channel, and daisy-chained outputs that allow groups of channels to be summed into a mixer. It is equally at home shaping amplitude envelopes, animating oscillator blends, scaling modulation signals, and half-wave rectifying bipolar LFOs into unipolar control voltages.
Features
- Four independent DC-coupled VCAs with audio-rate signal handling
- Continuously variable exponential-to-linear response curve per channel
- Positive offset control (0 to 8V) per channel added to the gain CV
- Gain CV input normalized to +8V when unpatched for slider-as-gain use
- A +5V CV yields unity gain (0dB) in both linear and exponential modes
- Exponential mode supports gains above +20dB for amplifying line-level signals
- Daisy-chained outputs: unpatched outputs sum their signal into the next channel downstream
- Gain indicator LED with brightness proportional to VCA gain on a dB scale
- Output indicator LED with brightness representing signal level and color representing polarity
- All inputs 100k impedance, DC-coupled
- Compact 10-HP footprint with sliders instead of knobs for gain/CV amount
- Output formula: (CV × cv_amount + offset) × input_signal
Controls & Jacks (31)
- Gain CV Input 1 — Gain CV input, normalized to +8V when unpatched
- Gain CV Input 2 — Gain CV input, normalized to +8V when unpatched
- Offset 1 — Adds positive offset (0 to 8V) to the CV signal for unipolar modulation from bipolar sources
- Gain CV Input 3 — Gain CV input, normalized to +8V when unpatched
- Gain CV Input 4 — Gain CV input, normalized to +8V when unpatched
- Signal Input 1 — DC-coupled signal input accepting audio or CV signals
- Signal Input 2 — DC-coupled signal input accepting audio or CV signals
- Gain 4 — Sets how much the CV input affects the gain of channel 4; acts as manual gain when no CV is patched (normalized to +8V)
- Signal Input 3 — DC-coupled signal input accepting audio or CV signals
- Signal Input 4 — DC-coupled signal input accepting audio or CV signals
- Signal Output 1 — Modulated signal output. When unpatched, signal is routed to the next channel for daisy-chaining
- Signal Output 2 — Modulated signal output. When unpatched, signal is routed to the next channel for daisy-chaining
- Signal Output 3 — Modulated signal output. When unpatched, signal is routed to the next channel for daisy-chaining
- Gain 1 — Sets how much the CV input affects the gain of channel 1; acts as manual gain when no CV is patched (normalized to +8V)
- Gain CV Amount 3 — Controls gain modulation amount from CV input or direct gain control when CV input is unpatched
- Signal Output 4 — Modulated signal output. When unpatched, signal is routed to the next channel for daisy-chaining
- Gain CV Amount 4 — Controls gain modulation amount from CV input or direct gain control when CV input is unpatched
- Gain CV Amount 1 — Controls gain modulation amount from CV input or direct gain control when CV input is unpatched
- Gain 3 — Sets how much the CV input affects the gain of channel 3; acts as manual gain when no CV is patched (normalized to +8V)
- Gain CV Amount 2 — Controls gain modulation amount from CV input or direct gain control when CV input is unpatched
- Gain 2 — Sets how much the CV input affects the gain of channel 2; acts as manual gain when no CV is patched (normalized to +8V)
- Output Indicator LED 3 — Brightness represents signal level, color represents polarity (green = positive)
- Output Indicator LED 4 — Brightness represents signal level, color represents polarity (green = positive)
- Gain Indicator LED 1 — Brightness proportional to VCA gain on dB scale, off when signal is muted
- Gain Indicator LED 2 — Brightness proportional to VCA gain on dB scale, off when signal is muted
- Offset 2 — DC offset control for channel 2. Sets the base voltage when no input is patched.
- Offset 3 — DC offset control for channel 3. Sets the base voltage when no input is patched.
- Offset 4 — DC offset control for channel 4. Sets the base voltage when no input is patched.
- Response Curve — Continuously variable between exponential and linear response curve
- Response 3 — Continuously variable response curve for channel 3 from exponential (CCW) to linear (CW)
- Response 4 — Continuously variable response curve for channel 4 from exponential (CCW) to linear (CW)
How-To Guides
- Classic Envelope VCA
- Bipolar LFO to Unipolar CV
- Four-Oscillator Animated Mixer
- Linear FM Depth Envelope
- Random Filter Modulation Amount
- Paired Submix Groups
- Line-Level Signal Amplifier
- Touch Ribbon Amplitude Control
- Enveloped Modulation Depth
Explore the interactive Veils panel on BleepDex — tap any control to learn what it does.
