If you wanted to use a magnetic pickup and send RPM to the PC via a serial
port I may be able to help you with a suitable interface.
Richard
[EMAIL PROTECTED]
----- Original Message -----
From: Sean Cross <[EMAIL PROTECTED]>
To: Multiple recipients of list delphi <[EMAIL PROTECTED]>
Sent: Thursday, 23 September 1999 17:57
Subject: RE: [DUG]: Sampling sound
> I am wanting to read spark plug pulses so i can calculate rpm (and then
add
> in accelration measured by a g sensor).
>
> The easiest way of doing this is via the microphone jack. Then I can find
> the peaks and do something with the information. I could just record
> everything into a buffer and look for the peaks in semi real time but I
need
> to be able to syncronise the data with other infomation (eg G sensor).
>
> How often I need to sample (and what the best process is) is something
that
> will require experimentation.
>
> All help gratefully appreciated.
>
> Sean
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
> > Behalf Of Alistair George
> > Sent: Thursday, 23 September 1999 08:24
> > To: Multiple recipients of list delphi
> > Subject: [DUG]: Sampling sound
> >
> >
> > > does anyone have any ideas/pointers on sampling sound. I don't want
to
> > > actually record sound, rather I want to get samples 100-200
> > times a second
> > > and then act on them immediately.
> > Depends a bit on what you want to do.
> > If you want the peaks I think the term is quantasize or similar.
> > There is a
> > WAV file 'normalizer' which is freeware which works on reducing or
> > increasing the overall level of the parsed WAV file for
> > consistent recording
> > levels. I am seeking the source code for this and if thats what you are
> > after let me know off the list.
> > Otherwise, if you want to look at millisecond 'frames' thats
> > another story.
> > There are several audio codes which demonstrate that as in VU
> > meters. If you
> > need ask me and I will send to you.
> > Alistair+
> >
> > ------------------------------------------------------------------
> > ---------
> > New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED]
> > Website: http://www.delphi.org.nz
> >
>
> --------------------------------------------------------------------------
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> New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED]
> Website: http://www.delphi.org.nz
>
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