Duality Pro - instructions

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Fine Tuning

Duality 2.0 – Instructions

Duality is a tool that allows you to create a custom video which can reveal a freely chosen number, word of even picture. You can make personal video starring your own persona and message. Get your spectator to interact with the video and they will not believe the result. As a proof, you will send them the video through any social media platform, and they will have a memorable piece of mentalism which also includes all of your business information.

In this tutorial we will take you through everything you need to do in order to use Duality 2.0 and create your own videos.

Log In

When you first open the app, this is the screen that you are going to see:

*You must read the Terms & Conditions and mark the accept option before you can proceed.

After that, sigh in with the option that you prefer. Once you do the app will continue automatically.


Gallery page

You default gallery page will look something like this. It is meant to look like your generic gallery. As you will add more videos, it will look better and better.

There are a few hidden secrets in this screen, which will help you navigate through the app:


 Main Settings page


 This is the screen you will get to after pressing a long press on the menu ion on your gallery page.

From here you can create a new video, go here (to the instructions page), Edit your indexes and fonts, and go back to the Gallery page. You can also go from here directly to our FB users group to get more ideas.


Create a new video

Creating a new video is quite easy, but it is important to know in advance what you are about to film. We recommend starting of with a basic presentation, which we call The thought projector, and you can find a detailed description of it below. Let’s assume that is the routine you are going to film first. Here is what you will need before you start:

  • The Duality app
  • A spiral notebook
  • A stand for the notebook, we recommend a small easel.
  • A marker, preferably a thick one as it shows best on camera.

Let’s start with the most important thing which is what points you should have in minds while making your first video:

Video guidelines:

When making your first video, here are a few things to keep in mind:

  1. You can technically use any camera to film the video, but we recommend you use your phone’s camera (front facing or back facing), as it usually produces video in FHD, and it also appears the most natural.
  2. Make sure your phone (or camera) is completely stable while revealing the prediction (use a tripod or place it on something still), otherwise the trick won’t look good. You can move around while you talk and present, but when the final revelation is done, the video must remain completely still.
  3. Choose which presentation fits you the most and use it (see the section below).
  4. The easiest way to hide the revelation is to cover it with the notebook’s front cover and place it on the easel (see pic 1).
  5. Give yourself some time between the moment you ask them to name their number outload and the moment you reveal your prediction. If you want to use the Gyro method, you need at least 20 seconds between those moments. Otherwise, we still recommend leaving around 10 seconds or so. That is when you are going to secretly input their number.
  6. When you reveal your prediction, try keeping everything steady, including the table and the surface. (Pic 2)
  7. Make it fun and entertaining! Ask them questions, ask yourself questions, or use running gags that you have in your act. You can also include other effects in the video to make it more visual, such as: Fire wallet, Make the marker appear/disappear etc.
  8. Another important tip is to add an underline where you prediction will appear. This not only look better, but also helps you to place the prediction easily when editing the video.

Pic 1


Pic 2



Input methods

Before we start talking about how to edit the video, we want to explain in detail what is the difference between each one and how to use them. The input methods allow you to code the required number to the video, all while still playing the video.

Grid mode

Using this method, you are going to code the number by tapping on the screen at certain positions.

The Grid method has 3 variations

  • Dim
  • No Dim
  • Pause

All of these methods are based on the same principle, the only difference between them is your reasoning for touching the screen.

First of all, you have to understand the grid. Here is a picture that will help you understand:


The first time that you tap the screen will indicate the first digit of the requested number. The second time you tap will indicate the second digit of the number. Ex. – If you want the number 57 to appear, you first tap 5 and then 7.

Dim Method

In this method, the screen will dim at a certain time point (which you will set up in the video editing page). You will tap the screen twice, apparently to wake it up. The first tap wont do anything, and the second tap will awake the screen. Again, tap number one will be the first digit and tap number two will be the second digit.

No Dim Method

This method works exactly the same as the Dim method, only here there is no dimming of the screen and nothing pops up as well. You still have to tap the screen after a specific time point, but for that you must look at the timer. This method is made mainly for performances in which you screen you video to a larger screen (Or virtual shows), and its benefit is that nothing seems to happen on the screen at all.

Pause Method

Works the same as the Dim method, but instead of dimming the screen, the first tap will pause the video, and the second tap will resume it. Again, you must notice the timer and only tap after the timepoint which you have set. The benefit of this method is that you can pause right before the revelation and build up some suspense before showing the end of the video.


  • If they choose a number that is lower than 10, first tap 0 and then tap the number.
  • The only number that will not work is 100, so please instruct your audience to choose a number between 1 and 100.
  • Next to the timer, you can see a small red dot. That dot will change its color to green once you reach the time of your input. Use that as an indicator of when you need to start transmitting.

After Pause method

This method is almost identical to the "Pause method" described above, the only difference is that when you tap to pause the video, the video will pause but no numbers will be inserted yet. After the video has been paused, you insert the number by taping twice on the screen (Same as the no-dim method), and only the second tap will resume the video. This method allows you to ask for the number only after you have paused the video. That means that you don't even need to ask for the number inside the video, since you can pause it and ask. This method is my personal favorite because it enables you to insert the number with no pressure at your own speed, and the pausing of the video makes a lot of sense when you are performing to a large group.  

The Gyro method

With this method, you will control the requested number by changing the position of the phone at a two specific time points.

When you set up the Gyro time in the editing page, you must select a round time inside your video (0:20, 0:30 etc.). From that point, the app will start being aware of the orientation of your phone. Try to hold it as steadily as possible. For the next 20 seconds, while the video is playing, you are going to input the requested number. Here is how:

The last digit on your timer will determine the outcome.

The first 10 seconds will be the first digit and the other 10 seconds would be the second digit. At the point when you slightly change the orientation of your phone, the smallest number in the timer will be the digit which will be inserted. For example:

If the number they named is 53, you would first move your phone at 0:25 and then again at 0:33. The two numbers 5 and 3 together will give you 53, which will be the number you reveal in the video.

The red dot next to the timer will assist you here as well. At the moment you insert the number, the red dot will turn green for a second. Then again in the next number.

Here is an example of how you can slightly tilt you phone while showing the video:


  • You will need more practice if you choose this method over the Grid mode since it is more sensitive and you do not want to code the wrong number by mistake, since once you code the wrong number there is no way back. Make sure you practice it enough, because once you do, it is even cleaner since you never touch your phone!
  • If they choose a number lower than 10, you are going to hold your phone still for the first 10 seconds and move it only on the second round.





Video Editor

The video editor is dived to 5 main section, each one has its own sub-sections. We did our best to make the it as simple and intuitive as possible, while stil allowing you to edit your video with incredible precision. Let’s start going over the interface:

Select Method

Here you can select which input method you want to use in order to transmit the requested information to the video. In order to set it up you simply choose one of the methods by clicking on in, and then you drag the time line to the point where you want it to begin. Once you have done so simply press the “set” button and the time will automatically be inserted. You can then use the back and forward arrows to adjust the time.

Notice that if you select Gyro mode, the time will always start at a round time (0:20, 0:30 atc.), so you must make sure that your video is correctly timed.



Set revelation

Here you can choose which type of information you wish to reveal. You can choose numbers, text or pictures (Coming soon). If you choose a text prediction, you must also select which index you are going to use, and you can always customize your lists by either clicking the “Edit lists” button or through  your index settings page.

Edit revelation

This is probably the most important screen to make sure your video looks good and believable.

Move the timeline to the point when the revelation is visible. Now, you can use all of the editing features to make sure the prediction looks completely natural in your video.  Select the color of the prediction so if fits whatever is covering it before (you can easily do that by moving the timeline to the point right before the moment of revelation, and to sample the color from it). Here is an example:

Please notice that some of the features are not visible at the first screen, so you need to scroll in order to see them.



Time revelation

Use this page to perfectly adjust the timing of your revelation.

Drag the timeline to the required point and press “Set”. You can then use the arrows to adjust it perfectly. We recommend that you test it a few times to make sure it is set correctly.

You can also use the end arrow   if your revelation goes all the way to the end of the video, and that would set everything automatically.

Edit video

To reach this page you must scroll the main menu of the editor to the left:

  • The “trim” function allows you to trim the length of your video.
  • The “details” function allows you to edit the time and day which will be presented inside of the video player.

  • The “Fine tuning” function will help you to make sure that your prediction is located correctly on the shared video. This step is crucial if you want to share your video after the performance. If you don’t you can skip it. Sometimes different screens can change the location of the revelation on the final video, by using this function you can make sure the location is correctly placed. Click the “Preview” button to see its placement and use the 4 different parameters to correct it.
  • The “Video quality” function will determine if the shared video will be in high resolution or low resolution. For a fast share, choose the lower resolution, for better quality, choose the high resolution.


Index settings:

In this page you can create your own indexes of predictions, or use the ones supplied. You can edit each one of them in any language, but you must make sure that there are fonts in the app capable of writing in that language. If you can’t find it, please contact us and we will add the required fonts.

 Share settings

You can reach this page by long pressing on a video in the gallery > share settings. The page looks like this: 

Here you can insert any text you would like to share with your video. Make sure the Enable this option first (The small button on the right). 

Write down your website, phone number and other commercial information you would like to send your clients. Once you share the video, the text will be automatically copied to your device's clipboard. Then, you only need to paste it in whichever platform you decide to share with. 

Sharing the video

We believe that the share option is probably the most significant tool for the working performer. After you are done with the effect, you can ask for your spectator's phone number, and send them the video immediately. They will have a reminder of the amazing thing that had just occurred, and you will have a new potential customer saved in your contacts. After the video is done playing, simply use the Share icon and choose a platform to share with:


How to preform with Duality?

Depending on your video, your presentation might vary. You can approach your spectator and ask them to look at a video you made for them, and to reply to is questions. If you want, you can also script some lines in which you talk with yourself in the video. Duality works best in a quite environment, where it is easy to hear what the video says. If you want to use it in a noisy residency, you can use written text instead of talking (to write down the question on pieces of paper).

For the index lists, you can either memorized the list (having it in alphabetical order would help you a lot), or write it down on a piece of card. If you have a clear phone case, you can slide the list underneath it and see it yourself while you are performing. If you choose to use it in a virtual show, you can simply have it printed in front of you while you are preforming. If you size down the list to only 20-30 options, memorizing them won’t be difficult (ex. If you use countries, you can only limit them to a certain continent).

Using a stacked deck with duality would also work perfectly. You can simply enter a card to  the app just by entering its position in the stack (if you wish to use a stack that in not mnemonica you must insert it to the index lists).

With the TX mode (coming soon), you don’t need to memorize anything, since you have a partner who will insert the information for you.


The thought projector - Routine

This is the most straight forward, to-your-face routine we have developed. It is commercial, it will get your spectator involved and most importantly it will give them a reason to go back to the video and watch it over and over again.

The effect:

The performer introduces a video on his phone and asks the spectator to reply to it as if they were in the same room together. The video begins by the recorded performer asking:

Has anyone ever influenced your decisions through the screen?

Most of us are influenced by our phones pretty much 24-7. I would like to try and input a thought into your mind, is that okay with you?

Excellent! Please think of any number you want up to 100, and do not tell anyone what it is.

The recorded performer then takes a notebook and writes something down, covering it with the notebook’s cover and setting it down. He then says:

I have committed myself to a single number. For the first time, can you name the number you thought of out loud?

Look at your audience as they say the number. Using your preferred method, code the correct number to the app while the recorded performer continues:

Now that felt like a free choice, right? There is no way I could control your decision through the screen and through time. Statistically speaking, there is only a chance of 1% that our two numbers will be identical. Unless of course, I managed to influence your decision…

If you are using the Gyro method, it is important that this part will last for at least 20 seconds.

The performer in the video will now open the notebook and reveal the chosen number (of courses you have already edited the video and all of the dirty work is done).  You then say:

Perhaps it was a coincidence, or maybe I did get inside your head. I will send you the video so you can watch it for yourself and maybe you will see when I did what I did.

This is straight forward lying, but it will get your audience attention and they will now have a good reason to revisit the video to try and “Catch you” (Some people might even play it in slow-motion, of course that does not matter).



More presentational ideas

  • It is up to you how do you choose to preform this effect. It can be a demonstration of mind reading, A prediction or a suggestion routine. Make the presentation personal and match it with your persona.
  • You can also include other elements in the video such as different force items (Cards, names, time, date, location, objects etc.) so you will have more than one climax.
  • Another idea is to write on the back of your business card: “I will be off by 2” and then to hand it to them before you show the video. Then you can preform the effect and have an extra kicker by revealing a number that is lower by 2 than the one they have named.