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Tested, in the app’s own words.
Each guide is checked against the current Founder Alpha build and says what it was checked against. Start with the setup guide; the rest are for streaming and recording.
Choose a task
Understand the cohost
What he is, what he receives, what he gets wrong and when he goes quiet.
- AI gaming cohost vs text-to-speech: what actually changes while you play?
- Does an AI gaming cohost play your game? What Signal Broker does instead
- What screen-based commentary can misunderstand: the limits of looking at pixels
- When silence helps and when it might mean a problem: reading a quiet Broker
- Who the current Founder Alpha suits, and who should wait
Set up OBS
One Browser source, the right capture, and a place that does not cover the HUD.
Fix audio or picture
No voice, doubled voice, a blank source, washed-out colours, and the check before you record.
- The Broker is visible in OBS but his voice is missing: a decision tree
- Why the commentary sounds doubled or echoed in a recording
- Game audio and a second voice: a practical layout for your recording
- A blank or disappearing Browser source in OBS: the troubleshooting flow
- Washed-out HDR gameplay recordings: the documented settings
- A repeatable pre-recording check: game, commentary, picture
Stream or record without talking
Quiet streams, no microphone, no facecam, solo play versus broadcasting.
Make a clip
Plan a vertical cut, fix the caption timing, know the file size before you record.
- Vertical gameplay clip planner: wide recording to 1080 × 1920
- Caption retimer and checker: shift SRT or WebVTT cues, find overlaps
- Gameplay recording size calculator: how big will the file be?
- Overlay captions, automatic transcripts and burned-in subtitles: three different sources
- Ultrawide gameplay in a standard horizontal video: layouts that keep the HUD and the action
- The founder’s recording-to-clip workflow: how a session becomes a checked vertical clip
Judge him on a real example
Recorded sessions, a scorecard to use on any commentator, and the questions to ask before installing.
- Recorded sessions
- Commentary across football, racing and a roguelike: what the Broker reads and what he misses
- How to evaluate an AI gameplay commentator: relevance, timing, repetition and silence
- Commentary evaluation worksheet: judge any AI gameplay commentator line by line
- Privacy questions to ask before adding a game-watching app: plain answers for Signal Broker
- Press and creator kit
All guides
- ARTICLESBlog & GuidesWhat an AI game cohost is and is not, how to judge one, and the OBS source size question, with these guides alongside.
- START HEREYour first session, step by stepRequirements, install, sign-in, choosing a game, start and stop, the overlay and Broker Bar, OBS capture and what leaves your PC.
- GUIDE · 13 OCTOBER 2026How to add an AI cohost to OBSA tested, step-by-step setup for putting Signal Broker on your stream or recording: enable the overlay in the app, add one Browser source in OBS at 800 × 600, place it above your game, capture his voice with Desktop Audio, and fix a blank source.
- GUIDE · 13 OCTOBER 2026How to stream without talking the whole timeYou do not have to narrate every minute of a stream. The options that actually keep a quiet stream alive: music and scene design, chat tools that read for you, a co-host, recorded segments, and an AI cohost; what each one costs you, and where Signal Broker fits (and where it does not).
- GUIDE · 16 OCTOBER 2026The Broker is visible in OBS but his voice is missing: a decision treeIf you can see the Broker in OBS but the recording has no voice, the Browser source is not the fault: it carries no audio. His voice reaches OBS through Desktop Audio, so the break is in the Windows output device, the device OBS captures, a mute, a track or a monitoring setting. Work down the tree.
- GUIDE · 16 OCTOBER 2026Why the commentary sounds doubled or echoed in a recordingA doubled voice is one sound reaching the recording twice through two paths; an echo is the second copy arriving later. In OBS the usual paths are monitoring into the device Desktop Audio captures, two sources capturing one output, and Windows’ Listen to this device. A checklist, and how to tell a double from a repeat.
- GUIDE · 16 OCTOBER 2026A blank or disappearing Browser source in OBS: the troubleshooting flowThe Browser source shows the Broker only while Signal Broker is open with Enable OBS overlay on, loading the address from Copy OBS Source with Local file off. Settle the app side first (Preview preset), then OBS: the address, Refresh cache, Shutdown source when not visible, hardware acceleration. The key stays private.
- GUIDE · 16 OCTOBER 2026Window capture, game capture or display capture in OBS, and what Signal Broker captures itselfGame Capture hooks the game and is the one OBS says to try first; Window Capture shows one window even when others cover it; Display Capture shows everything on that monitor. Which to use with the Broker, what each exposes to viewers, and why the app’s own capture, after you tick Allow game capture, is not OBS.
- GUIDE · 16 OCTOBER 2026Where the cohost and captions sit without covering the HUDRead the HUD first, then pick the preset: bottom health bars want the Broker in a corner above the bars, a corner minimap wants the opposite corner, a centre crosshair wants anything but Centered. Three labelled layout examples, the three in-app presets, the numbers for Edit Transform, and the preview to check it.
- GUIDE · 16 OCTOBER 2026Washed-out HDR gameplay recordings: the documented settingsWith Windows HDR on, SDR content can look too bright or too dark, and a recording made without OBS’s HDR settings is an SDR file of an HDR picture: the grey, flat look. Two documented routes: record SDR with HDR off for the session, or record HDR with P010, Rec. 2100 (PQ) and a 10-bit HEVC or AV1 encoder.
- GUIDE · 16 OCTOBER 2026A repeatable pre-recording check: game, commentary, pictureOne checklist before every recording with the Broker: the game (running first, chosen, confirmed, Allow game capture ticked), the commentary (role, volume, Desktop Audio meter, Signal Time) and the picture (Browser source above the game, placement, HDR decision), then a short test recording. HTML and plain text.
- FREE TOOL · RUNS IN YOUR BROWSEROBS overlay layout previewA free, in-browser layout preview for streamers: pick your scene size, drag the Browser source (800 × 600 as the app asks, or 1280 × 720) where you want it, choose the Centered, Bottom left or Bottom right preset, and copy the position and size to type into OBS. No account, no upload, nothing leaves your browser.
- FREE TOOL · RUNS IN YOUR BROWSERGameplay recording size calculator: how big will the file be?Estimate how many MB or GB a gameplay recording will take from its length and average bitrate, in decimal GB and binary GiB, for one recording or a batch, and check it against the space you have. Runs in your browser; your numbers are not sent to a server.
- FREE TOOL · RUNS IN YOUR BROWSERVertical gameplay clip planner: wide recording to 1080 × 1920Plan how a wide gameplay recording (16:9, 21:9, 2.39:1 or 4:3) becomes a vertical 1080 × 1920 or 1080 × 1350 clip: full frame with a Broker inset, centre crop with the lost sides measured, or letterbox. Preview the composition and export the placement numbers. It previews composition; it does not edit video.
- FREE TOOL · RUNS IN YOUR BROWSERCaption retimer and checker: shift SRT or WebVTT cues, find overlapsPaste or open an .srt or .vtt file, shift every cue by a positive or negative number of milliseconds, optionally stretch for drift, and get a report of malformed timestamps, end-before-start cues, overlaps and cues pushed before zero. Download the corrected file in the same format; processed in the page, not uploaded.
- FREE TOOL · RUNS IN YOUR BROWSERCommentary evaluation worksheet: judge any AI gameplay commentator line by lineFill in the evaluation article’s scorecard while you watch any recorded AI commentary: one row per spoken line with relevance, timing, repetition and keep, a silences box and a tally of your own ratings. Saved in your browser only; export CSV or JSON, import JSON, print. It records your judgement, not a measurement.
- QUESTIONSShort answersThe Broker, which games work, Signal Time, the free trial, pricing, pause and game switching, streaming, privacy and refunds.
- SUPPORTTroubleshootingBroker doesn’t start, stopped commenting, overlay not visible, game not detected, sign-in and audio problems.
Start with 30 Signal Minutes free.
Founder Alpha is available to customers in the United States. Founder Alpha is early-access software. Signal Broker is an AI system. The Broker's words and voice are generated using AI. No person is speaking or writing what he says.