USER MANUAL · VCV RACK · v2.0.0 · 24 HP
Harbour is a stereo mixer that can breathe on its own. It has four stereo channels, each with volume, pan, mute and two sends, and two send and return loops for your effects. It is a clean, ordinary mixer first. Two knobs make it Harbour's own: TIDE lets every channel's volume and pan wander slowly and independently, at random, like boats at their moorings, so a patch keeps shifting without anyone touching it, and SALT puts a little tape on the master bus. Both are off until you turn them up. Nothing clicks: mutes, sends and every control fade over a few milliseconds.
Click any knob, jack, button or the meter. Everything shown is at its default setting. The four channels are identical, so clicking any of them tells you about that control on every channel. Harbour comes in two panels, silver and black: Rack picks one from its own dark-panel setting, and you can force either from the module's right-click menu.
Each of the four channels is a stereo strip, read from the top down: the audio inputs, three rows of CV inputs, the big VOL knob, then MUTE and PAN, then the two AUX sends.
Patch a stereo source into both, or a mono source into IN L alone: IN R copies IN L when nothing is patched into it, so a mono source sits in the centre. A polyphonic cable into either input is summed to one signal.
The channel's volume. It is silent at the left and unity (0 dB) at 75%, and it starts there. There is 5 dB in hand at the top. The tooltip shows decibels, and you can click the knob and type a level ("-6", "-inf"). VOL, AUX 1, AUX 2 and MASTER all use this same curve.
PAN behaves the way the source needs. With a mono source (nothing patched into IN R, so IN R copies IN L) it is a true pan: both sides are at exactly unity at the centre, and as you turn it the signal moves across, keeping its loudness, until at the far left it is on the left side only and the right side is silent. A quarter of the way left, the right side is already 3.5 dB below the left; halfway, 7.7 dB.
With a stereo source (both IN L and IN R patched) it is a balance: at the centre both sides pass at exactly unity, so the stereo picture is untouched, and turning it left turns the right side down, to silence at the far left, while the left side stays as it was. A balance keeps a stereo image whole, so some of a panned stereo source is always heard on the far side: use IN L alone, or a mono mixdown, if you want to place a sound with a pan.
You can type a value: "L40", "R25" or "C".
One button, three states per channel: Off, Mute and Solo, one at a time. Its tooltip reads Channel 2 M/S: Off, Mute or Solo. Mute (left-click) lights it red. It fades over about 5 ms, so it never clicks, and it silences the channel's sends too, before or after the fader. Other channels are not touched.
Solo. Right-click the button to solo that channel (the mouse icons on the panel show which click is which). Soloing a channel takes it out of mute, and muting a soloed channel takes it out of solo. While any channel is soloed, every other channel is muted (with the same fade), and the soloed channel's button glows amber. Solo a second channel to hear both. Right-click it again, or choose Clear all solos in the module's right-click menu, to bring everything back. Solo is saved with the patch.
How much of the channel goes to send A (AUX 1) and send B (AUX 2). Both start at zero, which is off. They use the same curve as VOL. Where the send is taken is chosen in the right-click menu (see Sends and returns).
Each channel has a CV input for VOL, PAN, AUX 1 and AUX 2, in the three rows under the audio inputs. VOL CV, AUX 1 CV and AUX 2 CV scale their knob: 0 V is silence, 10 V leaves the knob as it is, and an unpatched jack counts as 10 V. PAN CV adds to the knob: +5 V is the whole way right, −5 V the whole way left, and an unpatched jack counts as 0 V. CV inputs read the first channel of a polyphonic cable.
Two loops, A and B, for effects that live outside Harbour: a reverb, a delay, anything with audio in and out. Each loop is a stereo pair of SEND outputs and a stereo pair of RETURN inputs, in the bottom row.
SEND A carries every channel's AUX 1 added together, SEND B every channel's AUX 2. By default a send is post-fader: it is taken after the channel's VOL and PAN, so a channel that is turned down, or that TIDE is easing away, takes its send with it. The right-click menu can make either send pre-fader: it is then taken after MUTE only, so it ignores VOL, PAN and TIDE, and the effect keeps hearing the channel at full while you pull the fader down. Switching between the two glides, it does not click.
Whatever comes back into RETURN A and RETURN B joins the master bus at unity, ahead of SALT and the master level. There is no return knob: set the level on the effect. A return does not go back into any send, so a loop can never feed itself. A polyphonic cable into a return is summed.
TIDE is the knob at the top right, and it is off. Turn it up and each channel's volume and pan start to wander, slowly and independently of each other, like boats rising and falling at their moorings. Low is a gentle, constant drift. High lets channels swing in and out of the mix.
Every channel has two wanderers, one for volume and one for pan, so eight in all. Each one picks a random target at random intervals and glides towards it, and is already heading for the next before it arrives, so it is always moving. Every new target is a real swing, usually to the other side of where it was. It is purely random: there is no pattern to learn and no seed to set, and Harbour draws fresh randomness every time a module is created, so no two modules, and no two sessions, breathe the same way. The wanderers are independent: one channel fading tells you nothing about the others.
Depth and speed ride one curve, so one knob does both. As you turn it up the movements get deeper, and arrive sooner:
| TIDE | Volume moves by up to | Pan moves by up to | New target about every |
|---|---|---|---|
| 10% | 3.6 dB down, 3.0 dB up | 10% of the way to either side | 9.7 s |
| 25% | 9.0 dB down, 3.0 dB up | 25% of the way to either side | 7.1 s |
| 50% | 18.0 dB down, 3.0 dB up | 50% of the way to either side | 4.2 s |
| 75% | 27.0 dB down, 3.0 dB up | 75% of the way to either side | 2.5 s |
| 100% | 36.0 dB down, 3.0 dB up | 100% of the way to either side | 1.5 s |
The movements are centred on where you have set the knobs. Volume can lift a channel by at most 3 dB above its fader, so TIDE never pushes your mix into clipping, and it can take a channel down by as much as 36 dB, which is as good as out. Pan wanders either side of the PAN knob. VOL and PAN CV, MUTE, and the sends all keep working: a muted channel stays muted, and a pre-fader send ignores TIDE.
While TIDE is running, a fine amber line curves round each VOL knob and each PAN knob, from where you have set the knob to where TIDE is holding that channel right now, with a small dot at the end. The line swings out and back as the channel drifts, so you can see which channels are moving, and by how much, without touching anything. It disappears when TIDE is off or the channel is muted.
The right-click menu has a TIDE speed choice. Medium is the speed in the table above; Slow takes 4× as long between targets (a very slow drift) and Fast half as long (2× as many). Depth is the same at all three, and the TIDE knob still sets depth and speed together within the choice. The choice is saved with the patch.
With TIDE at zero nothing moves and nothing is added: Harbour is an exact, ordinary mixer. That is checked sample for sample against a plain reference mixer, and a mixer that has been through TIDE and back to zero is bit for bit the same as one that never left it. Turning TIDE up or down eases over about 50 ms, so the knob itself never clicks.
Tip: start around 20 to 30% for a mix that is alive but never loses anything, and go higher for a patch where channels should come and go.
SALT is a little tape on the master bus, and it is off. It is the lo-fi half of Haar's Drift, brought over: the mix is saturated softly, the top end rolls off, and the whole thing wobbles very slightly in pitch and level the way a worn tape does. A busy mix sounds warmer, softer and a little alive, not louder or harder.
It sits after the returns and before the master level, so the MASTER knob does not change its character, and it is on the master bus only: the sends are never salted. What it does, at full:
Like TIDE, the wobble draws fresh randomness every time a module is created. There is nothing to set. At zero SALT is bypassed completely: the signal does not pass through it at all.
The master level, the last stage before OUT L and OUT R, on the same curve as VOL. It starts at unity (0 dB) at 75%, 5 dB in hand at the top. It does not affect the sends.
Two columns of five LEDs, left and right, watch what leaves OUT L and OUT R, after the master level. They read the peak, and the light falls away over about 300 ms. From the bottom they light at −18, −12, −6, −3 and 0 dB, where 0 dB is a 5 V peak, the usual level of Eurorack audio: three green, then yellow, then red. Red means the output is touching 5 V peaks. That is not a fault, since Rack does not clip, but whatever follows might.
Harbour is stereo and not polyphonic. It expects ordinary Eurorack audio, about ±5 V at the peaks, and puts out the same level.
| Jack | Type | Notes |
|---|---|---|
| IN L / IN R (x4) | audio in | IN R copies IN L when unpatched. A polyphonic cable into either is summed to one signal. |
| VOL CV (x4) | CV in | Scales the channel's VOL: 0 V is silence, 10 V leaves the knob as it is. Unpatched counts as 10 V. Held between 0 and 10 V. |
| PAN CV (x4) | CV in | Adds to PAN: ±5 V sweeps the whole pan. Unpatched counts as 0 V. Held between −5 and +5 V. |
| AUX 1 CV · AUX 2 CV (x4) | CV in | Scales the send, as VOL CV does. Unpatched leaves the knob alone. |
| SEND A L / R · SEND B L / R | audio out | The summed AUX 1 and AUX 2 sends of the four channels, post- or pre-fader. |
| RETURN A L / R · RETURN B L / R | audio in | Come back at unity into the master bus. A polyphonic cable is summed. Not fed into any send. |
| OUT L / OUT R | audio out | The master bus, after SALT and the master level. |
Nothing steps. Every level, pan, mute and send glides over about 5 ms inside the engine, so stepped CV, fast envelopes and sample-and-hold sources stay clean.
Harbour is sold through the VCV Library, for Mac (Apple Silicon or Intel), Windows and Linux.
Harbour needs Rack 2.
| Format | Rack 2 · 24 HP | Stereo, not polyphonic. Silver and black panels. |
| Channels | 4 stereo | VOL, PAN (a pan for a mono source, a balance for a stereo one), MUTE, AUX 1, AUX 2, four CV inputs each |
| Loops | 2 stereo | SEND A / B outputs (post- or pre-fader), RETURN A / B inputs at fixed unity |
| Fader law | unity at 75% | silent at 0, +5 dB at the top; the same for VOL, AUX 1, AUX 2 and MASTER |
| Fades | about 5 ms | mutes, volumes, pans, sends, pre/post and the master |
| TIDE | 0 to 100% | eight independent random wanderers; volume down to −36 dB and up to +3 dB, pan up to 100%; a new target every 12 s down to 1.5 s; exactly off at 0 |
| SALT | 0 to 100% | master bus, before the master level; bypassed completely at 0 |
| Audio | about ±5 V | in and out; IN R copies IN L when unpatched |
| CV | VOL, AUX: 0 to 10 V · PAN: ±5 V | VOL and AUX scale their knob; PAN adds to its knob |
| Latency | none | Harbour adds no delay to the signal |
| Sample rate | any | Rack's rate is followed |
| Platforms | Mac · Windows · Linux | Apple Silicon and Intel Macs |
Harbour's engine is original. It uses no third-party DSP. Harbour is closed-source and proprietary.