Re: Anyone have luck matching VU meter ballistics
Re: Anyone have luck matching VU meter ballistics
- Subject: Re: Anyone have luck matching VU meter ballistics
- From: David Reaves <email@hidden>
- Date: Thu, 22 Apr 2010 21:27:33 +0200
The VU spec is very simple, and predates the IEC. Heck it predates
just about everything! It is in the public domain.
http://www.rane.com/par-v.html#VU_meter
http://en.wikipedia.org/wiki/VU_meter
Using a 1kHz tone of +3dB on the meter (full scale), the meter must
reach 99% full-scale deflection in 300 ms and overshoot not less than
1% and not more than 1.5%. The fall time is identical. Off the top of
my head, a two-pole lowpass filter with a moderate Q (just over 0.7)
should do the trick.
Kind Regards,
David Reaves
On Wed, 21 Apr 2010 17:04:53 -0700 mike woodworth <email@hidden
> wrote:
Hey all,
I'm setting out to write a level meter that closely matches VU meter
ballistics, and I'm not finding much via google. Before I break
down and buy the IEC spec, I wanted to see if anyone had already
reinvented this wheel.
mike
--
Mike Woodworth
email@hidden
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