Stacks Image 31
Stacks Image 26
'Lorelei' is a VCO (Voltage Controlled Oscillator) with quadrature sine outputs, waveshaping, and sync/cross-modulation options.

The module has three waveform outputs, all affected by the same waveshaping controls (a front panel knob and a CV input). The first offers a variable pulse width square wave. The remaining two offer waveforms based on quadrature (i.e. 90 degrees out of phase) sine waves. The waveshape control progressively turns the first sine output into a triangle-like waveform; the second sine output becomes a saw-like waveform.

The cross-modulation input is somewhat like the sync input found on more conventional VCOs, but it has more nuances of operation allowing for a wider choice of sounds.

The module is 100% analogue, using discrete transistor OTAs.


Sound On Sound magazine (June 2022 issue - read the full review here) said

Much is possible with these three outputs and the Shape control alone, but Lorelei goes further to offer linear and exponential FM inputs, as well as a cross‑modulation/sync input for some highly inventive and excellent‑sounding voices.

Waveform Magazine (issue #7 - read the full review here) said

You can get some really great sounds out of Lorelei and the feature set and overall quality of this module really outpaces the price of it.


Lorelei's specifications are as follows:
  • Panel width: 8HP
  • Module depth: 42mm
  • Current draw: 55mA on the +12V rail, 54mA on the -12V rail
  • Inputs:
    • 1V/octave pitch
    • Linear FM
    • Exponential FM (with attenuator)
    • Cross modulation/sync
    • Wave shape (with attenuator)
  • Output:
    • Square/pulse
    • Sine/pseudo-triangle
    • Cosine/pseudo-saw

For more detail, please see the user manual.
Explore the Expert Sleepers analogue modules:

Pricing & Availablity

Lorelei is available now.

MSRP: UK £159 (inc VAT), US $189 (exclusive of sales tax), EU €154.36 (exclusive of VAT)

For purchasing links, please see where to buy.

We use cookies and other tracking technologies to improve your experience on this site. We also link to content on external websites which may also gather information about you when you visit them. This is all perfectly normal. You can find out more about cookies (including how to turn them off) here and you can read our Privacy Policy here.