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Chapter 6: Timing And Tuning Adjustments

AUDIO FILES (To download all WAV examples at once: 44MB ZIP)

  • Matched-waveform Audio Edits: Here's an example of the kind of mid-note slice point that can benefit from a matched-waveform edit (Ex06.03:WAV/MP3 bp). At the moment the waveform is mis-aligned and without any crossfade, so you hear a big click. Sliding the waveforms fractionally to line up their repeating cycles dramatically reduces the click, even without any crossfade (Ex06.04:WAV/MP3 bp). Adding a short equal-power crossfade over just a couple of waveform cycles smooths the result even further (Ex06.05:WAV/MP3 bp). Although the edit is still not completely inaudible in this case while the vocal is soloed, it'll be more than good enough to pass muster when set against even the most basic backing arrangement.

  • Masked Audio Edits: An often overlooked method of concealing audio edits is to hide them behind other masking events in the production, as demonstrated in the following audio examples. Here's a truly blood-curdling audio edit (Ex06.06:WAV/MP3 bp), causing a big lump right in the middle of a vocal line. Now listen to that same edit within the context of the mix, and notice how the strong masking action of the drum loop's kick/hat downbeat completely conceals even such horribly clunky discontinuity in the vocal line (Ex06.07:WAV/MP3 bp).

  • Pitch Correction Side-effects: Although state-of-the-art pitch-correction engines such as Celemony Melodyne's DNA now offer enormous potential for pitch-correction, they still tend to produce unwanted processing side-effects when presented with transient, noisy, or polyphonic audio. To show what I mean, here's an out-of-tune acoustic guitar recording (Ex06.10:WAV/MP3 bp), and the same file which I have corrected as carefully as I can in Celemony's Melodyne Editor (Ex06.11:WAV/MP3 bp). Note the chorus-like artefacts during note sustains (particularly bad at 0:03) and the softening of the picking transients.

  • Improving Automatic Pitch Correction: Automatic real-time pitch-correctors will usually give unmusical results with their default settings. Take this untuned vocal (Ex06.12:WAV/MP3 bp), for example, and hear how GVST's GSnap plug-in responds unmusically if left with its default settings (Ex06.13:WAV/MP3 bp). Using automation or MIDI data to tell GSnap what notes are being sung improves the musicality somewhat (Ex06.14:WAV/MP3 bp), but it's only once the correction speed is adjusted in real time using automation (Ex06.15:WAV/MP3 bp) that the correction begins to feel more transparent.

  • Time-stretching Versus Beat-slicing For Tempo Adjustment: Although modern time-stretching algorithms can be very effective on some sounds, they tend to struggle with noisy or percussive tracks. Take this 95bpm drum loop (Ex06.18:WAV/MP3 bp), for example, which I've slowed down to 85bpm with two different algorithms: the bundled Elastique 2.1 Pro routine in Cockos ReaperMac LogoWindows Logo (Ex06.19:WAV/MP3 bp) and the specialised third-party Celemony Melodyne software (Ex06.20:WAV/MP3 bp). Notice in particular how the tone of the drum sustains takes on a slightly chorus-like quality in the first example, but how the amplitude envelope of each drum hit is also extended unnaturally by the processing even in the less chorus-y second example. By contrast, slicing up the loop into its component hits and crossfading over the gaps (Ex06.21:WAV/MP3 bp).

  • Timing & Pitch Correction In Context: Here's an example I did for this Mix Rescue remix which demonstrates how timing correction can subtly tighten up the sound of a mix. Here's a section of the remixed backing track, first without any timing correction (Ex06.01:WAV/MP3 bp), and then with extensive timing edits to the bass and guitar parts (Ex06.02:WAV/MP3 bp). This Mix Rescue project, on the other hand, illustrates the impact of tuning correction on the blend of a track. Here's a section of the remixed backing track, first without any tuning correction (Ex06.08:WAV/MP3 bp), and then with extensive off-line tuning edits to the guitar and synth parts (Ex06.09:WAV/MP3 bp). A final combined timing/tuning-correction example comes from this Mix Rescue, where you can compare the sound of a section of the final remix with all the corrections (Ex06.16:WAV/MP3 bp) and without them (Ex06.17:WAV/MP3 bp).

WORKFLOW DEMO VIDEO


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LINKS



  • Some Plug-in Tuners: If you can head off tuning problems at source, you can save yourself a lot of problems. Here are a couple of freeware tuner utilities in case there's nothing suitable already built into your DAW software: GVST's GTuneWindows Logo and NDC's Tune ItMac Logo.

  • Third-party Pitch/Time-manipulation Software: There are a number of well-established developers of real-time pitch/time-manipulation software, including Antares (with Auto-TuneMac LogoWindows Logo), Celemony (with MelodyneMac LogoWindows Logo), and Waves (with TuneMac LogoWindows Logo). Serato also have a good reputation for off-line processing with their Pitch 'N TimeMac LogoWindows Logo software, and SynchroArts VocAlignMac LogoWindows Logo may be useful for you if you find yourself with lots of multitrack layers to synchronise. Although I use Melodyne myself (not least because of its ability to work more flexibly with polyphonic audio), any of these options will deliver professional results. If you're working on a tight budget and your DAW doesn't include real-time pitch-correction as standard, then check out GVST's freeware GSnapWindows Logo or G200kg's freeware KeroveeWindows Logo. Alternatively, try out the low-cost Cockos ReaperMac LogoWindows Logo DAW, which includes the ReaTune plug-in as standard.

FURTHER READING

  • Tuning & Timing In Practice: Tuning and timing so regularly cause problems for home-brew mixes that I often talk about them in Mix Rescue. In this article, for example, there's a case-study of tuning a lead vocal in Melodyne, while this article and this article both talk about practical aspects of timing/groove adjustment.

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