The scripts are already on your disk. This plays them properly.

01

Your library, not a library

Tandem ships with nothing in it. You point it at the folders you already keep, and it does the sorting.

It finds your videos, pairs each one with its motion files, builds thumbnails, and plays them with your device driven live off the script's timeline. That index is built on your PC. Nothing about your library is sent anywhere, and there is no account to make.

• Add as many folders as you like — Tandem scans them and remembers them
• Search by title; filter by Scripted, Multi-axis, VR, Watched or Unwatched
• Sort by newest, oldest, name, length, folder, or shuffle
• Multi-axis scripts are picked up automatically, companion files and all (name.twist.funscript, name.roll.funscript, the rest)
• An intensity strip under the video shows where the action is — click it to jump there

02

Shape the motion while it plays

A script is one person's idea of the right range. Your hardware, and your preference, are not obliged to agree with it.

Every adjustment here is live. It changes what goes to the device as it plays and leaves your .funscript files exactly as they were — the region editor in section 04 is the one part of Tandem that writes.

• Depth — scales every stroke around its own centre, so the script's contrast survives instead of flattening out
• Top reach and Bottom reach — push peaks toward the ceiling and valleys toward the floor
• Speed — including an option to run the device faster while the picture stays at normal pace
• Latency offset — nudge device timing against the picture until it lands right

The wheel over the picture is depth. One key (G by default) switches to Finish mode, which stops the motion — or plays your own finish script, if you have set one.

03

Build motion the script never had

Most scripts are stroke and nothing else. If your device has more axes than that, Tandem can write the rest itself.

Twist, roll, pitch, surge, sway and vibration, each generated against the stroke track with its own motion style, range, speed, timing and direction. Find a combination that suits a device and save it as a preset, then apply the whole rig to any video in one click.

None of this is baked in. Turn a preset off and you are back to the script as its author wrote it.

04

Edit without leaving the player

The stretch that is too shallow is usually forty seconds long. Fixing it should not mean a second application.

Select a region on the timeline and raise or lower its peaks and valleys a step at a time. Loop that region while you tune it, undo anything, and restore the untouched original whenever you want.

Export the result as a new funscript, or save it in place — saving overwrites the .funscript and keeps a one-time .bak of the original beside it, so the first save is always reversible.

05

In the headset

Play through DeoVR or HereSphere and Tandem keeps the device in sync with what the headset is actually playing.

Browse, play, seek, recenter and set your viewing distance from inside the headset. Depth and reach are on their own page there, so a session never sends you back to the desk — and with a licence, so is the region editor.

Headset playback works over your own network. Tandem listens on your LAN only once you switch library sharing on for it, and while it is on, any device on that network can reach your library — there is no password.

06

Built for the keyboard

Thirty actions, all remappable, so a session never needs the mouse. Depth on the wheel. One key (G by default) for Finish mode, which stops the motion — or plays your own finish script, if you have set one.

07

What leaves your PC

Short enough to print, so here it is in full.

Unlocking your key

Sends the key itself and a one-way code for the machine (plus a flag if that code had to be made from the PC's name and processor), and gets back a file kept in your Windows profile. Every later launch reads that file instead. It is good for a year. If the licence server cannot be reached, the key unlocks anyway for seven days, and Tandem tries again each time it starts — sending the key again until the server answers. The same happens if the year ever runs out.

One check per launch

About half a minute in, Tandem asks whether your key has been moved to another PC. That request carries a short licence reference and the same one-way code — not the key, no filename, nothing about what you play. If it cannot get through, nothing changes and the app carries on. That same check quietly collects the next year when the unlock file is inside its last two months, so in normal use unlocking is a one-time thing.

Those two are the only things Tandem sends to a server of mine, and between them they carry your key, that reference and that code. Nothing about your library is in either.

Two devices are cloud devices

The Handy and Autoblow are driven through their makers' own cloud services — that is the interface those devices offer — so playing to either one sends your script's motion out to them while it plays. Serial, UDP and Intiface devices are driven straight from your machine, over your own cable or network. The device page says which is which.

Script sources

In the headset, with a licence, a scene you have no script for can be looked up at a supported script source — one site you add yourself, by typing its address and signing in. There is none to begin with, so a fresh install looks nothing up anywhere.

Tandem serves its own interface on 127.0.0.1 while it is open, and nothing is left running once you close it.

08

What you get

• Tandem Player 1.0.0 for Windows (64-bit), as a folder you unzip and run — no installer, nothing written to your registry, nothing left running once you close it
• A licence key, delivered the moment your payment clears — one PC per key, and you can move it to another PC: the first move free, after that once every 30 days
• Free updates within 1.x

Requirements

• Windows 10 or 11, 64-bit
• Your own video files and .funscript files
• A supported device — optional. Tandem is a perfectly good player without one