It has to do with the meter movement, in particular the damping and
integration time of the movement.
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Regards,

Jim

> -------- Original Message --------
> Subject: Re: [PIC] RE: VU Meter
> From: David C Brown <dcb.home@gmail.com>
> Date: Mon, August 11, 2014 10:54 am
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
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> What is meant by "ballistics" in this context
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> On 11 August 2014 15:26, Vasile Surducan <piclist9@gmail.com> wrote:
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> > A while ago I've did a toy acting as a simple VU-meter with a PIC16F628
> > using the internal comparator and it's reference. The paper is publishe=
d in
> > a magazine, unfortunately in Romanian language, useless for you.
> >
> > If you need only the sinusoidal level, then it's easy even without an A=
2D
> > converter.
> >
> >
> > On Mon, Aug 11, 2014 at 2:48 PM, <alan.b.pearce@stfc.ac.uk> wrote:
> >
> > > Added PIC tag ...
> > >
> > > > I am interested in designing an LED VU meter based on a PIC for use=
 in
> > > > professional audio. I know there are several designs around on the =
net
> > > for
> > > > consumer use BUT they all rectify the incoming signal before proces=
sing
> > > it in
> > > > the PIC. This limits the ballistics that can be emulated and all of=
 the
> > > examples
> > > > I have come across so far have particularly poor ballistics. For
> > > professional
> > > > use I would want to AtoD the audio and carry out all processing ins=
ide
> > > the
> > > > PIC.
> > > > Has this been done already or am I breaking new ground.
> > > >
> > > > Any help appreciated.
> > >
> > > Are you looking at doing a VU meter or a PPM?
> > >
> > > http://en.wikipedia.org/wiki/Peak_programme_meter
> > >
> > > many of the LED VU meters seem to combine the two functions by having=
 a
> > > single bar showing the peak while the level dances around under it. T=
he
> > bar
> > > showing the peak is then controlled in the manner of a PPM.
> > >
> > >
> > > --
> > > Scanned by iCritical.
> > >
> > > --
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> > >
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> >
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> --=20
> __________________________________________
> David C Brown
> 43 Bings Road
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