Audio quality

http://allstockmusic.com/offers a wide range of high quality music tracks, ranging from smooth, slow-paced tracks to dynamic, very fast tracks, which will make any visual material more pleasant. There are jingles, music tracks and looped tracks. Everything you may need both for personal and commercial projects. Since all tracks are composed by professionals, they know perfectly what clients expect to get. Professional composers pay special attention to quality of tracks they release.

The tracks are 44.1 kHz, 16 bit. It is enough for all your projects, no matter what it is – a video or a game.

What does 44.1 kHz mean?

44.1 kHz is a very commonly-sued sampling frequency. Sampling is the process of reduction of a continuous-time signal to a discrete-time type. A sound wave, which is a continuous signal is converted to samples that is a discrete-time signal. 44.1 kHz means that audio is recorded sampling sound 44100 times per second. When the track is playing, the samples are used to “recover” the audio. This rate is still the most common one. De facto Sony created and made it that popular.

Technical reasons

Of course, there are reasons, why this sampling rate is used. Here are the main ones:

  • Human factor

The theorem of Nyquist–Shannon states that the frequency of sampling must be greater than the maximum frequency needs to be reproduced multiple by two. We know, that a human can hear sounds in the range from 20 Hz to 20,000 Hz or (20 kHz). According to the theory, the sampling rate should be more that 20kHz * 2, which is 40 kHz.

  • Signal processing

A transition band (a range of frequencies between a pas band and a stopband) is necessary and the wider the band the better the anti-aliasing filter is. The 44.1 kHz sampling rate makes a 2.05 kHz transition band possible, which is enough to create high quality sound with good anti-aliasing filter.

People still discuss if 44.1 kHz is enough. Nowadays, the rate of 48 kHz is used quite often, especially when it comes to video. However, for audio material, 44.1 kHz is still the most commonly used rate.