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An Introduction to Equalization - A free download from Audio Masterclass

Equipping Your Home Recording Studio - A free download from Audio Masterclass

An Introduction to Compression: Basic Compression - A free download from Audio Masterclass

Q: "Why is the signal from my microphone low in level and noisy?"

Do some microphones respond to EQ better than others?

Click removal at the start of a track

Two microphone preamplifiers compared at Abbey Road Studio 2 - tube and transistor

Is it time to reinvent the physical mixing console?

"There is background noise in my studio. Should I use a noise-reduction plug-in?"

Make your recordings richer with double tracking

This one simple mistake will lose you a third of your songwriting royalties - with video

Today you can buy microphones that were used to record Nirvana's 'In Utero'

What is production? Part 4: Mixing

Natural echo chamber

How to add reverberation from a real acoustic space to a recording.


The natural echo chamber is a room with hard irregular surfaces, in which are installed a loudspeaker and two microphones (for stereo).

The microphones should not point at the loudspeaker.

Signal is sent via an auxiliary send and power amplifier to the loudspeaker, and returned from the microphones to the console where it can be mixed in with the dry signal.

The natural echo chamber never sounds realistic, firstly because loudspeakers never sound realistic anyway, and it is generally too small to produce really good-sounding reverberation.

Even so, the result is quite unlike any simulation of reverb as it is a much denser sound, and it worth experimenting with even today.

It has also been known for classical music recordings to be 'improved' by using a large auditorium as a natural echo chamber.

If electrostatic loudspeakers are used then the result can be of excellent quality.

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By David Mellor Tuesday March 11, 2003
Online courses from Audio Masterclass