“The problem with the Fourier transform and related technology is that, for a long time, it was an offline process,” says Product Owner Christian Kleine.
The difference is that FFT uses calculations quick enough to be used in real time. FFT is often used interchangeably in name with the discrete Fourier transform (DFT), because they’re essentially the same thing. Live 11’s new Spectral devices are based on the fast Fourier transform (FFT), which was popularized for use in audio in the nineties as digital processing became more powerful. It’s named after French mathematician Joseph Fourier who, in 1822, laid the groundwork for what later became known as the Fourier series. Within a musical context, it’s used in signal processing to break signals down into their various parts, or frequencies. The Fourier transform is a mathematical algorithm with applications across engineering, image processing, optics and more. Natalye Childress spoke with the product owner and some developers past and present to give you an inside look at the history and inspiration behind these devices, as well as share tips and tricks for how to best use them in your own music-making endeavors. The Fourier transform has been around a long time, but this is the first time Ableton is including this technology in Live. Though the resulting sounds from each device are distinct, the two are connected by their common ground of being based on the fast Fourier transform (FFT). Both break sound up into partials and process it in ways that range from melodic, lush, spooky and futuristic, to stuttery, dissonant, glitched-out and metallic. Spectral Resonator and Spectral Time are two devices introduced in Ableton Live 11.
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