Numerical Recipes Non Linear

audio content in

This post will develop the following topics

• audio content in "Quiz FABER
• file types by using the" Sounds ", usable in Quiz faber
• Files Production used in audio Quiz faber
• Advantages and limitations of this potential

1. Audio content "Quiz FABER

I have already dealt in the past " Quiz FABER , a freeware to make quiz in HTML format to use the computer. For more about this software, in particular on how to dispose of in a lawful and free refer to my previous post on this blog, as well as to my tutorial on Youtube.




QuizFaber are possible with the following types of questions: Multiple Choice

2. A multiple choice True or false
4. text with words omitted
5. word association
6. Answers open

For more on the aspect of management of applications refer to the specific tutorial on Youtube



Given the breadth of educational applications of this software, this post will be limited to explore one specific possibility: insert a sound component (for example, the voice of the trainer) in testing products .
This is a potentially very useful in all areas of education where it is appropriate to use the communication channel verbal / auditory, for example: dyslexia

• linguistic
• music education and so on.

E 'appropriate to specify that "Quiz FABER is fully configurable with regard to the inclusion in the quiz multimedia objects as images, sounds and movies, being compatible with the most 'widespread Internet formats (JPEG, GIF, MID, MP3, AVI, MPEG) and with the plug-in for Macromedia Flash, Apple QuickTime, Liveupdate Crescendo, RealAudio .

If you have already installed "Quiz faber" on your computer you can find an application of this potential in the management of applications by clicking on "Properties "

addition quiz Faber also allows you to insert audio content at the following location
Quiz / quiz Properties / Sounds

The inclusion of an audio file in both cases is not particularly difficult but I think it appropriate to make a few instructions on how to use those file for further use in "Quiz FABER .
A clarification: the inclusion of multimedia content is vast, so in this post I will deal with the inclusion of sounds.
in the future will develop the look and the inclusion of other types of media in "Quiz faber."

2. File Types "Notes" used in Quiz faber

From a brief examination of the screen above will be evident that there are two formats the usability for the inclusion of Sounds , the menu choices in the Media .

1. Wav Files (*. wav) , contraction Waveform audio format (audio format for the waveform) is an audio format developed by Microsoft and IBM. It 'an uncompressed format that tends to generate files of considerable size. P er-depth reference to the specific page of wikipedia http://it.wikipedia.org/wiki/WAV
2. Midi Files (*. MID) extension of Musical Instrument Digital Interface, which is the standard protocol for the interaction of electronic musical instruments with computers. It 's a format which is extremely widespread , for further information on Wikipedia http://it.wikipedia.org/wiki/Musical_Instrument_Digital_Interface

3. Production of audio files used in Quiz faber

opportunities in the field of audio production are enormous, and there are people on the Web much better than me in this aspect, sophisticated software tools are also available e. .. expensive.

I'll just submit simple means of lawful and designed to have free use of audio files for use in manufacturing test.

Basically the possibilities are as follows:

• Record your voice to ask the questions or provide operating instructions
• Convert audio tracks available in other formats (eg CD) in the formats required
• download audio files from the WEB

3.1 Record your voice to ask questions or provide operating instructions

very useful option, I propose two possible solutions software to achieve this. The first, as well as being lawful and free, is instantly usable without installing anything. I refer to the Windows world, for the lucky users of the Apple media management is never a problem.

Windows operating system is available in an application called Sound Recorder
What you find in Windows XP Programs / Accessories / Entertainment

Just plug in a microphone the appropriate port of your computer's sound card, you can already start this application and record audio files . WAV.
This is a very essential, the inerfaccia allows limited, but simple options. In practice Record, pause recording, Closing the recording, play back the recording, Save the resulting file.

E 'a tool with limitations, the main one is that the records are limited to 60 seconds, but if you look for an easy to use and install with nothing to record short voice messages for this program may be sufficient .
If by chance it does not work quiet, it is usually a trifle of the following:

• Wrong mortise lo spinotto nella porta audio (...in quella rossa)
• Il microfono è disabilitato, in Windows XP andate su Impostazioni/Pannello di controllo/Suoni e periferiche audio/Audio e attivate il microfono. Qui potete intervenire anche per registrare il volume del microfono nel caso la registrazione risultasse ad un volume troppo basso

Se però cercate uno strumento software più performante, e di lecito e gratuito utilizzo, consiglio Audacity , un software libero open source per registrare e modificare l'audio. È disponibile per Mac OS X, Microsoft Windows, GNU/Linux, e altri sistemi operativi .
You can use Audacity to:

• Record live audio.
• Convert tapes and records into digital recordings or CDs.
• Edit audio files Ogg Vorbis, MP3, WAV or AIFF.
• Cut, copy, merge or mix audio.
• Change the speed or pitch of a recording.
• And much more!

For further information please refer to the specific page of instructions http://audacity.sourceforge.net/about/

You can legally download this software from http://audacity.sourceforge.net/download/

download the executable file created with the usual double-click, in addition to accepting the conditions of supply of the software the only information that is required is the choice of language.

the installation is complete reboot and advice immediately after you start using this application.

3.2 Transform audio tracks available in other formats (eg CD) in the formats required

Very useful, but with the caveat of pay attention to copyright when using material from other

Audacity 3.2.1 Use
One of the conversions is probably the most common format . MP3 format . WAV, in this case is always used Audacity . In a later post will deal directly with how to use the MP3 format.

But if we use the conversion can simply open a file. MP3 with Audacity

And export. WAV.

3.2.2 Extract CD tracks with CDex
Another useful option is to extract audio tracks from a CD. Always with the caveat of respect for copyright can be useful estrememante CDex , ripper, which is a software that can effetture this operation, which allows for both file formats . MP3 that . WAV audio from a CD .

CDex is a free software that comes from the world of Open Source (GPL License) that we can legally download from the following address

http://cdexos.sourceforge.net/?q=download

Also during the conversion it is possible to improve the sound quality thanks to an advanced jitter correction and support the normalization of audio files (which helps prevent distortion).

CDex supports many encoders and audio formats like WAV, MP3, OGG, VQF, APE, Lame MP3, FAAC, WMA and other , has a simple and intuitive graphical interface and includes a player that can play MP3 and media files .

3.3 download audio files from the Web

the Net are many risorse di questo tipo, con la solita avvertenza di prestare sempre molta attenzione a cosa si sta scaricando...

4. Vantaggi e limiti di questa potenzialità

Ci sono anche svantaggi che è opportuno considerare.

• I test con questi contenuti, come per tutte le applicazioni multimediali, sono di "generosa" dimensione, i Mbyte si sprecano, questo comporta come prima conseguenza che caricare la prova sul computer o sul server è più lungo rispetto alle solite prove.
• Altro elemento da tenere presente è che l'elaborazione della parte multimediale richiede una scheda audio, un processore "combattivo" e idonea RAM (= Non credo sia applicabile senza problemi su macchine "datate").
• In caso di somministrazione della prova in un'aula è estremamente opportuna una cuffia per gli esaminandi in luogo delle casse per evitare confusione che sia di disturbo alla prova