There is always a moment in my daily life at itnig when a startup asks for a video. Sometimes it’s an ad, sometimes an event, sometimes it’s just a tutorial, but no matter what it is, it comes with the need of creating a sound that represents the company and can be played at the start of the video along with the appearance of their corporate logo.

This short sound must represent their essence, it has to have their DNA reflected somehow: a representation of their values, their culture or maybe even something related to their name or logo. It is mainly an artistic process that requires inspiration but in some cases the startup name and culture is geeky enough to allow some rational thinking into the music composition process. Last week I crafted the sound for our startup Factorial, inspired by the mathematical operation their name represents.

Assigning values to notes and choosing the first note

Putting a mathematical operation into sound requires a bit of imagination as well as a set of rules to get started. The first step was assigning values to notes. I decided to assign C4 the value 1. It is the middle key in a piano and also the middle C according to the International Pitch Notation so it seamed and appropriate value for that key.

Piano keys, notes and assigned values

Now we had to decide which factorial operation to represent. That is, choosing an x to which we would perform x! and represent it. Being the startup name Factorial and given that it starts with an F, it made sense to perform the operation on F4, the first F we would find after C4.1_XXstZcEGfSkP4fOQiouJdA.png

Performing the n! operation

Now that we had chosen to start at F4 we just had to assign notes to the operands in the operation and put them in the score.

4! = 4*3*2*1 = F4 E4 D4 C4


Now we had a simple downwards scale without much musical interest but how could we enrich the melody and still make it part of the factorial operation?

Making the middle operations sound too

As we manually start to calculate the factorial operation of a number and before we get the result, we obtain partial operands that are part of the process. How would the melody sound if we added those partcial numbers to the score?

The size of the partial operands makes the need to place them on a staff above obvius. Also because of the sequentiality of the operation we put the partial operands once we have been able to obtain the result, that is after the first note and while the second note is playing.


The first partial operand is obtained after multiplying F4 and E4 wich is the same as 4*3 which equals 12 that represents a G5 if we check the keyboard note to number assignation.


F4 * E4 * D4 = G5 * D4 = 12 * 2 = 24 = E7

If we keep calculating we obtain the note E7, which is the result of multiplying F4 * E4 * D4.


Finally, we obtain the same E7 after multiplying the previous result by C4, which has the value 1.

Final result

If you are curious to listen to how this mathematical representation of the factorial operation sounds like, play the video below.

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La firma digital conc Juan Zamora CEO de Signaturit

El podcast de esta semana lo patrocina Codeworks, la escuela de programación más intensiva de Europa con la que aprenderás JavaScript y te convertirás en full-stack developer en tan sólo 3 meses!

Si utilizas el código promocional ITNIG19 y eliges la opción de pago por adelantado, obtendrás un 5% de descuento ahorrándote 500€. Este descuento es válido hasta el final de 2019 y aplicable únicamente si el código promocional se escribe en el formulario de solicitud. 

Esta semana Bernat Farrero (CEO de Itnig) y Jordi Romero (CEO de Factorial) charlan con Juan Zamora sobre cómo Signaturit se ha abierto paso como un referente en la firma digital, facilitando la digitalización de los negocios.

Signaturit es un híbrido entre una empresa legal y una plataforma tecnológica ya que su valor principal es dar certeza de que alguien ha aceptado algunas condiciones. Juan nos explica que hay distintos niveles en la firma digital y que por lo tanto hay distintos modelos de explotación tecnológica.

En concreto Signaturit, se centra actualmente en un nivel de firma que se puede utilizar en contratos de trabajo o de otro estilo y aprovechamos este podcast para anunciar una alianza entre Signaturit y Factorial para que los empleados puedan firmar de forma legal todos sus documentos directamente a través de la aplicación de Factorial.

Juan también nos comenta cuál es su visión sobre otras empresas que hay en el sector como EchoSign de Jason Lemkin (adquirida por Adobe con Adobe Sign) o DocuSign.

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