See how your gear connects.
Drop your synths, drum machines, interfaces and patchbays onto a map. Draw the cables. Get the wiring checked in plain words, and a suggested plan for what goes where.
Open the mapperFree. No sign-in needed. Everything runs in your browser.
Three things it does
Draw
Add devices from a library built on manufacturer specs, drag them around, and cable outputs to inputs. MIDI, audio, USB, sync and patchbay rows, each colour coded.
Check
Ten wiring rules run as you draw. Every warning says what is wrong and how to fix it, in the words a working engineer uses.
Suggest
Say what should control what and what should be recorded. The mapper proposes the cables, draws them, and names anything the plan is missing.
The cable legend
Every cable on the map is drawn in the colour of what it carries. The same colours run through the checks and the suggestions, so a sentence about a blue cable is always about audio.
Rules in plain words
The checks read like a colleague looking over your shoulder, not a manual.
What the mapper looks for
- Out to out, in to in
Two outputs cannot hear each other; two inputs have nothing to say. The mapper names the cable and the fix.
- Missing MIDI Thru in a chain
A device with In and Out cabled but no Thru breaks the daisy chain. Its Out only sends its own notes.
- Thru chains that run too long
Past three hops, MIDI timing drifts. The mapper counts the hops and suggests a thru box.
- Two devices on one channel
Both will play everything the source sends. The mapper names them and the channel.
- USB MIDI without a host
USB MIDI always needs a computer or a hub port between devices. Direct cable to cable does nothing.
- TRS type A into type B
The two 3.5 mm MIDI wirings swap the pins. The mapper flags the pair and the converter cable that fixes it.
- Unbalanced into balanced
It works, but the noise rejection is lost. The mapper says when a long run deserves a DI or a balanced output.
- A patchbay normal that would break
Patching the front of a normalled row cuts the rear path. The mapper says which row and what stops.
- A device nothing can control
A synth with no MIDI or audio reaching it sits silent. The mapper points out what to connect.
- An output nobody hears
Playable but mute: no output cabled. The mapper names where the cable should go.
Free, private, in your browser
The whole mapper runs on your device. Suggestions are rules, not a service: nothing is sent anywhere, nothing costs you or the site a cent per use, and no sign-in is needed to build, check, export or share a map. A shared map travels inside its own link.
Device details come from manufacturer specifications only. Nothing is copied from other mapping sites, and anything a maker does not state is shown as unknown rather than guessed.
Open the mapper