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TuneBox help

Find the fix for the most common problem below. If it doesn't solve it, use "Ask for help" at the bottom of the page to reach support directly.

Frequently asked questions

Downloading and installing TuneBox

I downloaded TuneBox and no installer appears. How do I install the program?
It depends on how you got TuneBox. If you installed it from the Microsoft Store (including via the “TuneBox Installer.exe” downloaded from the Store page), there is nothing to do: installation is automatic — open TuneBox from the Start Menu, and updates arrive through the Store itself. The TuneBox.exe downloaded from the site, on the other hand, does not need to be installed: it is a ready-to-run program — just download and run it. You will not see the traditional setup wizard (“Next, Next, Finish”), and that is normal. Follow 4 steps.
  • 1) Download TuneBox: go to the website, log in to your account and open the Download tab; the download delivers a single file called TuneBox.exe.
  • 2) Scan TuneBox for your safety: right-click TuneBox.exe and select “Scan with Microsoft Defender...” (on Windows 11, click “Show more options” first to see it). The scan result should read “No current threats (0 threats found)”.
  • 3) Unblock the file (important step): for safety, Windows usually blocks programs downloaded from the internet. Right-click TuneBox.exe and choose “Properties” (or select the file and press Alt+Enter); on the “General” tab, at the bottom of the window, in the “Security” section, tick the “Unblock” checkbox and click OK. This block is just a standard Windows precaution for any file that came from outside your computer — it does not mean anything is wrong with the program.
  • 4) Put TuneBox wherever you prefer: copy TuneBox.exe to the folder where you intend to use it (the Desktop, for example) and double-click it to open.
When I open TuneBox I get the error “MSVCP140.dll was not found” (or VCRUNTIME140.dll)
TuneBox depends on a free Microsoft component called the Visual C++ Redistributable, which already comes installed on most computers — that is why the error only shows up on some machines, usually new or freshly formatted ones. The fix is to install it once. Follow 3 steps.

Placement, measuring and calibration

I calibrated and the sound got worse or strange
Calibration makes the response curve flat, and that removes the sound's original coloration. To fix it, in Live you can bring the coloration back with the source's bass, mid and treble controls. If the sound still seems strange, the measurement probably captured enhancements that were on (the player's bass boost, an "enhancer", ambience effects, the mixer's "rock/pop" mode) or the speakers at different volumes. Turn off every enhancer, match the speaker volumes and run the wizard again measuring the raw sound.
The sound is harsh or distorted and the correction doesn't remove it
That's input clipping: the signal went past the ceiling and the information was lost. Set the input gain with the sound at the real event volume, keeping the peak between -12 and -6 dBFS; the CLIP light must never light up.
One side is louder than the other, or the coverage is uneven
The speakers were at different volumes when you measured. Match the level of all of them before measuring — it's the starting point for everything.
Up front the sound blasts and at the back you can barely hear it
The speaker is right on the first row: every time the distance doubles, the volume drops 6 dB. Move the speaker away from the nearest listener; the goal is for that difference to stay under 6 dB across the room.
There's no bass, or the bass disappears at some spots on the floor
The sub is off the floor or out of the corner, or two subs are apart on opposite sides (the bass cancels at certain spots). Put the sub on the floor, ideally in a corner, and keep the two subs together.
The highs vanish at the sides or as I walk around the room
You're outside the beam of the highs (about 60 degrees). Raise the speakers to ear height and aim the axis of each one at the center of the audience.
I placed everything and the calibration still came out wrong
The microphone was probably outside the beam of one of the speakers. Put it in the zone where the beams of all the speakers cross, roughly where the audience will be.
Why does TuneBox avoid the dedicated-subwoofer topology?
Your microphone doesn't measure the bass reliably (typical of a dynamic vocal mic). Use a measurement mic or a condenser; see the microphone table on the Learn page.
The correction turned out imprecise, especially at the extremes
You measured with a "colored" mic (a vocal one). Prefer a neutral measurement mic; if you use your own, accept that the deep bass and the very high treble come out less accurate.
In a church, big hall or gym the voice isn't intelligible (echo, slurred words)
It's a reverberant room without delayed reinforcement. Let TuneBox run the diagnosis and use the PA + Fill topology (the reinforcement waits for the front sound and fires together).

During the show (Live)

The mic voice comes back delayed or "detached" for whoever is singing
It's high latency. When someone sings and hears themselves through the monitor, use ASIO mode (install your interface maker's driver, or ASIO4ALL). When the computer is only the player, WASAPI is enough.
The microphone squeals — how to stop the feedback (that whistle)
Before the show, run the feedback-suppressor calibration: raise the mic gain until it is on the edge of squealing, with the room still quiet, so the suppressor can map the room squeal points. It spots each frequency about to squeal and lowers only that one. After that the suppressor does not stop: it keeps watch during the event and locks down new points that appear once the room fills up. Save that venue setup at the end of the night — next time you play there, it starts with what it learned.
I calibrated the feedback suppressor and it still squealed during the event
That is expected, and the program is doing its job. The feedback-suppressor calibration happens with the room empty and silent; a full event is a different environment — the audience absorbs sound, singers move in close to the mic, the band plays, and squeal points appear that did not exist at calibration time. TuneBox keeps listening during the event and locks those points down as soon as they come back. Two things help a lot: leaving a few dB of headroom instead of running at the edge of your gain, and saving that venue setup at the end of the night — what the suppressor learned is stored with it and will be there next time you play the same room. If the squeal is low and persistent, use the low cut on the mic channels of your mixer: feedback well below the voice is better handled there.
I push the volume and the sound gets flat and tiring
You're pushing everything against the limiter. Leave headroom: the limiter is the seatbelt, not the accelerator.
Can I use my VST3 plugins (like a pitch corrector) on the microphone?
Yes. TuneBox works as a VST3 effect plugin host on the microphone path — free or paid, any plugin already installed on your PC (for example, a pitch corrector for karaoke or live vocals). The plug icon next to the mic volume control, on the Live screen, opens the plugin management panel. This never affects the mixer or controller sound — only the microphone. If you have more than one mic input, you can build a different chain for each one (say, pitch correction only on vocals and another effect only on guitar) or apply the same plugin to two karaoke mics, each as an independent instance.
TuneBox can't find my VST3 plugin, or it warns about latency — is that normal?
TuneBox looks for VST3 plugins in the default Windows folders and in one extra folder you can point it to from the management panel (use the “Rescan” button after installing a new plugin). Only effect plugins show up in the list — sound generators and analyzers are left out on purpose. The latency warning is just a heads-up: it never blocks use; it exists because effect plugins add a few milliseconds of delay, which becomes more noticeable with several chained on the same input. If you notice annoying delay, disable a plugin in the chain or use a lighter one.
Why don’t my VST3 plugins show up in the TuneBox I got from the Microsoft Store?
Because TuneBox installed from the Microsoft Store runs inside a container — an isolated environment Windows creates for security, which does not give the program full access to the machine’s contents. That is why it cannot see the VST3 plugins installed on your computer. It is not a bug or a missing setting: it is how the Store format works.
To use VST3 plugins — including TuneBox Voice FX, which is free and made by us —, download TuneBox.exe from the Download page and run it from there. After downloading, remember to unblock the file in Windows: the 4 steps are on the Download page itself.

Connections and gear safety

I turned on phantom power (+48V) — can I damage gear?
Yes, on the wrong gear. Use phantom only on the measurement or condenser mic and turn it off when moving to line-level gear (controller or mixer).
A speaker or the amplifier burned out or went into protection
Likely an impedance below the amplifier's minimum (like a short circuit). Never connect speakers with an impedance lower than the manual states, and match the power — too much hurts, too little distorts.

Audio interface and Windows

I moved the interface to another USB port and the sound changed (the highs dropped)
Windows stores levels, format and "Enhancements" per port, and the Enhancements filter the treble. Always use the same USB port, disable the audio "Enhancements", allow exclusive mode and keep it at 48 kHz.
TuneBox doesn't recognize my interface, or it fails homologation
The built-in (onboard) sound card is ignored on purpose; use a USB audio interface. If it's unknown, the app validates it with a loopback test — run a cable from the output to the input, leave 2 channels in Recording and "Listen to this device" unchecked.
The interface failed for "monitoring on"
A MIX/MON knob or the "Listen to this device" option is feeding the sound back to the input. Turn off direct monitoring and run the test again.
My player's sound doesn't go through TuneBox (it goes straight to the interface)
Windows tends to promote the interface to default device and the player bypasses the app. TuneBox uses an exclusive output precisely to force the path — route the audio to TuneBox, not straight to the USB interface.

License and activation

I didn't receive my activation code
The code is only sent after the email is validated and the payment is confirmed. Validate your email (the link lasts 48 h), check the spam folder and look in "My license" in your panel; if you already paid and it didn't arrive, resend it from the panel.
I formatted or changed the drive and TuneBox asks to activate again
The license is tied to the computer, and formatting requires reactivating that same PC — it's allowed and unlimited. Reactivate online (at home, with internet) before the event.
I want to use it on another computer (transfer the license)
It's one computer at a time, with unlimited online transfers. Copy the code in your account, enter it on the new PC, and the app revokes the previous machine and activates the new one.
TuneBox requires revalidating over the internet before opening
More than 15 days went by without an online revalidation (this applies to lifetime and subscription). Connect to the internet once; opening the app with a connection now and then avoids this screen.
My subscription expired, or the PC clock triggers a warning
Expiration only shows at startup, never in the middle of the show. Renew online; if the computer clock is fast, fix it (the app protects itself against a "stretched" date).

If the event stops

The power went out or the event stopped — how do I get back fast without redoing everything?
TuneBox saves the complete setup. At startup, choose "Resume the last setup and go straight to Live", with the same calibrated interface and the same USB port.
On resuming, it warns "interface missing", "different port" or "environment changed"
These are preventive warnings, they don't block anything. Connect the interface used in the calibration and the same USB port; if you changed rooms, confirm to continue or redo the measurement.

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