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These detected events then serve as control points for what Digidesign call 'warping' the audio. These might be drum hits, the beginning of a sung note or the start of a chord played by a guitar.

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When you change an audio track to Elastic Audio mode, Pro Tools automatically takes the audio offline for a while to analyse it for transient events.

The rendered option gives you the ability to use Digidesign's XForm algorithm instead of the four types listed above. The System Usage window displays Elastic Audio activity separately from RTAS plugin overheads.You can choose whether Pro Tools will handle all the time compression and expansion in real time, which is quicker but puts more load on the computer or render, which means you have to wait for the files to be processed each time you change something, but has the advantage of not increasing the load on the computer. The fourth algorithm is Varispeed, which produces a tapemachinelike varispeed effect where pitch and speed are changed together. Three of these are timestretch algorithms designed to keep pitch constant whilst varying speed: they are Polyphonic for multiinstrument loops or complex instruments like pianos and strings, Rhythmic for drums and anything percussive, and Monophonic for singlepitch instruments including vocals. Major changes have been made 'under the hood' to ensure that Elastic Audio works as seamlessly as possible, but these are only apparent in a few places one such is the System Usage window, which has a new CPU Usage indication for Elastic Audio.Įlastic Audio introduces two new track modes, Analysis and Warp, and four analysis algorithms to choose from.Elastic Audio is accessed via a new track mode in the Edit Window, which offers one of four realtime algorithms that you select to best suit the type of audio content on that particular track. These are not new technologies, but what is new is the way Digidesign have integrated Elastic Audio into the normal Pro Tools working environment to make using it as easy as possible. Behind The ScenesĮlastic Audio uses a combination of transient detection, beat and tempo analysis, and timestretching and pitchshifting algorithms. All the things you take for granted with MIDI - moving and stretching notes and phrases, conforming loops to new tempos - can now be done with audio Regions. The idea behind Elastic Audio is that it allows you to work with audio in the Edit Window as if it was MIDI.

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The biggest new feature in the 7.4 upgrade is something Digidesign call Elastic Audio. So it's a welcome change to find that nearly all the new features in Pro Tools 7.4, including the big one, are for the HD, LE and MPowered platforms. Often, the most exciting new features in Pro Tools appear first in the highend HD version, and there's a frustrating wait before LE and MPowered users get them - if they ever do.

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Nowadays, we expect software to be able to change the tempo of recorded audio, but the latest version of Pro Tools integrates this functionality in a new and impressive fashion.

Avid digidesign pro tools keyboard for pc