Essay about Digital Audio

Sound is something quite special, impactful, and adds layers of elements and complexity to a film. As with the progression of the movie making medium, sound has grown and changed drastically over the decades. However, sound cues in the form of effects, dialogue, and everything in between, shapes our perceptions of a scene and movie.

Most successful musicians know a hidden art carried out by the work of a good sound engineer; it is essential for a magnificent album. For the rest of us novice listeners and fans, we believe what we hear through our speakers or played over the radio are the true skilled professional musicians, soaring at their craft. Most contemporary music, from pop to R&B and acid jazz to the sophisticated realm of orchestral film scores, has been modernized by several inventions encased within the studio. The art of audio engineering has taken on new forms, from the nuts and bolts, "plug it in, and see if it works" era into the digital world, because of these wonderfully tragic solutions to a

“In lossless compression, an exact reproduction of the original sound source can be crated; all original sound can be recovered”.(Bauer, 2014). So most people would use a WAV or AIFF file to record and compress sound. This makes music recording simpler because most people myself included, want to capture all of the sound that I am recording just in case I want to change something about the original recording that I did not like. With the lossy file large amounts of data is not is lost and unable to be recovered. If you are a live recording of an event you might consider using a WAV file to ensure that all information is

All audio is recorded is analogue and needs to be converted to digital. In order to do this a technique known as sampling is used. Here is a picture of how sampling works. The red line is the original analogue audio. The gray blocks are each sample of the audio. The more samples there are the higher quality or more true to the original it will be.

In elecronic, broadcast, transportation, filters are used to select the desired signal, and deny or block unwanted signals. Or put in other words, they may be the only way we have to block.The doing so, we want to signal and other frequency or with a device, is frequency-selective - it behave different towards different frequencies. Such device is called a filter. (Bertrand, 2002)

Digital Filter. An on-chip digital filter is used to minimize the signals and noise that are outside the band of interest.

Explain the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented?

A composite signal can be decomposed into individual sine waves called harmonies.Fourier analsis is done to decompose a signal.the decomposed signals have different amplitude,frequency and phase.A periodic signal has

21. What is sampling error? Could the value of the sampling error be zero? If it were zero, what would this mean?

Technology and music have always been interlinked. As technology improves ways of recording and distributing music improves. Over history we have gone from scratchy records to clear and portable MP3s. New and innovative technology have helped to shape America’s culture as a nation.

In addition to the practical work of recreating a soundtrack of a Wallace & Gromit clip, a learning report on the subject had to be submitted. The soundtrack needed to be created by using a type of sound design known as Foley. Other than that, dialogue, wild track and music had to be added as well. Afterwards, these sounds would be synced to the video track and adjusted accordingly. “Sounds are vibrations traveling through the air as sound waves” Apple Inc. (2010). “Big sound waves have what's called a high amplitude or intensity and we hear them as louder sounds” Woodford (2009). If we add more gain to the sounds of lower intensity we risk adding noise to them and ruining the recording, this is known as signal to noise ration.

Sound as in speakers is being produced out for you to be able to hear what you want, and the way you hear these sounds from your computer is by having a sound card plugged into the

In addition, it is also paramount for the audio quality to be consistently audible for all members of the audience. This will be achieved by utilising a system design configuration that focus’ on clarity and direction whilst also rendering itself sympathetic to the sensitive ears of the general public not attending the event.

With those pieces missing it gives the music a much more crisp sound. “Subtleties like the overtones of violins and parts of the harmonic texture of music are simply omitted in a CD recording,” says Carl Smith, Owner and Vice President of Well Tempered Lab. “So what you have is a superficially superior sound” (Day 92). Superficial in the sense that analog recording is a more natural recording while digital is more crisp and clear. Another positive aspect of digital recording over analog recording is that digital recording has a much better bass sound. The bass is much easier to hear in a digital recording. Analog recording has low bass sound because for an LPs or records it needs big grooves for the bass and LPs and records use smaller grooves.

way that creates the “perfect” tone. These manufactured sounds are what created one of today’s