Entries by eddie

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Mixing with Headphones

This subject has done the rounds for years. Often it is the cash strapped home studio owner who has to resort to using headphones, the cheaper and space saving solution, instead of speakers to conduct mixing projects. There are obvious advantages for using headphones for mixing, but glaring disadvantages too. There are no winners here […]

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Filters – What are they and how do they work?

Briefly explained: A filter allows you to remove unwanted frequencies and also allows you to boost certain frequencies. Which frequencies are removed and which frequencies are left depends on the type of filter you use. Before we can list the different types of filters and what they do, there are a few terms and definitions […]

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Creative Sampling

Most sampling enthusiasts usually sample a beat, audio piece or riff when they sample. Your sampler is so much more than that, and offers a wealth of tools that you rarely even knew existed, as they are kept so quiet, away from the ‘in your face’ tools. This tutorial aims to open your eyes to […]

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Noise Gate

A Noise Gate does exactly what it sounds like. It acts as a gate and opens when a threshold is achieved and then closes depending on how fast a release you set, basically acting as an on-off switch. It reduces gain when the input level falls below the set threshold, that is, when an instrument or audio […]

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Normalisation – Peak and RMS

Normalisation is a digital signal processing function that’s available in a lot of digital audio editing software. It scans through the programme material for the highest level (Peak value), and if that level doesn’t reach the maximum available dynamic range, the software boosts the overall signal so that the Peak hits the highest level possible. […]

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The Different Colours of Noise

In essence, noise is a randomly changing, chaotic signal, containing an endless number of sine waves of all possible frequencies with different amplitudes. However randomness will always have specific statistical properties. These will give the noise its specific character or timbre. If the sine waves’ amplitude is uniform, which means every frequency has the same […]

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Jitter in Digital Systems

Jitter is the timing variation in the sample rate clock of the digital process. It would be wonderful to believe that a sample rate of 44.1 kHz is an exact science, whereby the process samples at exactly 44,100 cycles per second. Unfortunately, this isn’t always the case. The speed at which this process takes place […]

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Frequency and Period

When dealing with events, as we do for cycles as an example, we are concerned with two factors: Frequency (f) and Time (T). If we look at a single event then T is defined as the start to end of that event and that amount is measured as a Period. When dealing with a waveform […]

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Dither – What is it and how does it work?

Dither is used when you need to reduce the number of bits. The best example, and one that is commonly used, is when dithering down from 24 bits to 16 bits or 16 bits down to 8 etc…Most commonly, dithering from a higher bit depth to a lower one takes place when a project you […]

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Digital Audio – Understanding and Processing

AN INTRODUCTION TO DIGITAL AUDIO In the old days, sampling consisted of recoding the audio onto magnetic tape. The audio, (analogue), was represented by the movement of the magnetic particles on the tape. In fact, a good example is cutting vinyl. This is actually sampling because you are recording the audio onto the actual acetate […]