The Stereo Bus Blog - Daily Music Production Tips

This post focuses on the basics of the differences between various amplifier (and preamplifier) types, namely class A, B, and AB.

When we first start out learning about audio equipment, there’s an awful lot of terms to sort through.  One in particular that escaped me for years was what exactly the various ‘classes’ of amplifiers amount to.  You hear ‘Class A’ thrown around quite a bit in the preamp industry.  What does it mean?

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This post focuses on convolution as it applies to audio - the capturing and reapplication of the qualities of sound.

A few years ago some new-fangled audio processing engines started to leak out of the lab and into the market involving a process called convolution. The name convolution comes from the type of math involved, but applying the process to audio signals provides for some pretty interesting opportunities.

Essentially, the process of convolution really requires two things: deconvolution and convolution. It’s actually a little backwards from the conventional use of the prefix ‘de’, although that again comes from its math roots. Deconvolution is the process of capturing the audio changes imposed upon a signal when fed through an environment, whether that be a physical room or a piece of equipment. Convolution is the process of applying those changes to a different signal. So, in essence, deconvolution would be ’sampling’ the way an environment affects the signal, whereas convolution would be making that sample into an effect, which is applied to other signals.
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This post focuses on creating engaging sound for music production by combining pretty sounds and ugly sounds for contrast.

Something that the most successful producers understand is the importance of both pristine, pretty sounds and awful ugly, sounds. There have been countless examples of moments where engineers, producers, and artists have strived for creating something that is only pristine. Generally these sorts of projects fall short of the intended quality. When everything sounds good, it does not sound good together. This is one of music production’s dirty secrets. When Rupert Neve abandoned his iron-laden transformer preamp designs to achieve low-distortion preamp results, they didn’t have the bulky sound that people relied upon from Neve components. When solid state guitar amps hit the market, people bought them but discovered they didn’t have the same pleasurable distortion as tube amps.

The best producers know how to make pretty sounds sound really pretty by pairing them with really lo-fi sounds. A master of this philosophy is Nine Inch Nail’s own Trent Reznor. Take a listen through The Fragile and you’ll hear some of the ugliest sounds you’ve ever heard contrasted with some of the prettiest sounds you’ve ever heard.

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