For music systems, this usually ranges from 6 dB (very compressed music) to over 20 dB. Mf-11. In the strictest technical sense, it only applies to steady-state signals like sine, square, saw, or triangle waves. An unprocessed drum recording however, which has a much lower average level due to the transient nature of drums, could easily have a crest factor of 16–18 dB. If the indicator is outside of the middle third, you can address this by adjusting balances in the mix, but there are also a few ways to address it in a master: Compression: Frequency-specific compression with a fast attack and release can reduce crest factor, while a longer attack and release can increase crest factor. Low end can eat up a ton of headroom in a mix. To put a finer point on it, crest factor is simply a symptom of different types of signals and a consequence of their natural characteristics. Copyright © 2001–2020 iZotope, Inc. All rights reserved. Tech Tip Of The Day: The Crest Factor In Mastering, Hosa Technology Debuts SuperSpeed USB 3.0 Cables, In The Studio: An Introduction To Audio Metering, The Judgment Triangle, a.k.a., You May Be Right, I May Be Crazy, In Profile: Sound Image Co-Founder Dave Shadoan, Four (Really Good) Reasons To Add Reverb To A Track, Bringing Clarity To The Element Of Time As It Relates To Sound, In The Studio: Recording The Rolling Stones “Brown Sugar” Sessions, Church Sound: Dialing In That Certain “Modern” Sonic Signature, Church Sound Podcast, Episode 20: Justin Edmonds & Gary Zandstra | Tech & Talent. It’s worth pointing out that for contemporary pop and EDM releases, it’s not uncommon to see crest factors of 5 or even as low as 3 dB. Two things happen when we make the transition to audio engineering: First, most audio level meters show the R.M.S.—or average—level of a sine wave to be equal to its peak level. In the end you’ll likely find that masters with a crest factor between 8–12 dB work well across a wide range of playback systems, all while still sounding full and punchy. For example, something like a legato string quartet with no dynamics processing could have a rather low crest factor of 6–8 dB. Dezember 2013, 12:12. Crest Factor – Peak to Short Term Loudness (PSR) ... Schafft er es doch, alle Instrumente soweit zu isolieren, um sie vielfältig zu bearbeiten, und dann im Mix trotzdem wieder den vollen Band-Mood plus die Saal-Atmosphäre powern zu lassen. If the mix is yours, this is a good opportunity to go back and address things at an individual track level. Higher crest factors indicate peaks, for example sound waves tend to have high crest factors. Simply stated, crest factor—sometimes called peak-to-average ratio—is the difference in decibels between the peak and average levels of a signal. For example, when we hear a sine wave, we don’t hear it’s peak value, we hear the whole waveform. (weighted or unweighted), integrated, short-term, or momentary LUFS, or something else, while the peak measurements could be sample- or true-peak. Punkte 285 Beiträge 42 OS Win7. If we’re listening to a finished mix and notice that the crest factor is on the higher side—perhaps higher than 14 or 15 dB—this is a good indication that the transient elements in the mix may be a bit hot compared to the sustained elements. How to use it to inform compression and limiting decisions. It could be that a combination of targeted, fast-attack compression and limiting will get you to a place where everyone is happy. Subjective Versus Objective: If It Sounds Good, Is It? At the risk of sounding cliche, I’m going to suggest something (really, almost anything) from Steely Dan’s catalog. Targeted static EQ or dynamic EQ: Cuts can reduce crest factor while boosts can increase it. Perhaps the snare is a bit hot, or maybe the drum bus could use a little saturation or limiting. First, it could mean that your job as a mastering engineer will be fairly easy. Crest factor is a parameter of a waveform, such as alternating current or sound, showing the ratio of peak values to the effective value. If you’ve ever noticed the low-frequency crest factor indicator in Tonal Balance Control 2, this is a hint. This will be the continuous power in dBW that you are delivering to your loudspeaker. Typically music has a crest factor of 10 to 20 dB (much more in some cases). With that in mind, let’s think about the crest factor of something a little more middle-of-the-road: a punchy, well-balanced mix, without much limiting. By eliminating processing that may artificially manipulate the crest factor of a recording, and metering the result, you can gain a general understanding of the nature of these signals and establish a good baseline to compare against. Hopefully this has helped you unravel what’s behind those two little words, “crest factor.” As with just about any audio meter, a crest factor measurement doesn’t tell you much in a vacuum. Just because two sounds have very different crest factor readings doesn't mean you can infer any qualitative evaluations without actually hearing them.
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