Re: Offline Rendering... still a thing?
Re: Offline Rendering... still a thing?
- Subject: Re: Offline Rendering... still a thing?
- From: Jens Alfke <email@hidden>
- Date: Wed, 05 Aug 2015 09:50:37 -0700
On Aug 5, 2015, at 9:41 AM, Brian Willoughby < email@hidden> wrote:
The two most common ways to depict audio waveforms are Peak and RMS. I don't think there's any standard for displaying cube root - although I'm sure it looks interesting. I'd recommend against inventing new math for displaying audio waveforms, especially since there are well-established standards.
I think we’re talking about different things. Peak and RMS describe how to reduce a time range of a waveform to a single number. What I was referring to is how to transform that number (i.e. a raw amplitude) into a volume level that’s meaningful to a human, since our ears’ response to sound pressure is highly non-linear.
I did some online searching and the two common approaches seem to be either logarithmic or cube-root. I experimented with both, and the latter seemed to produce a more intuitively-correct display, to me at least. (Disclaimer: I could be mis-remembering the formula; it’s been several years since I looked at my code for it.)
—Jens |
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