Excel beeps

[Richard Moody]

I have wondered if a data base can be used to call up two or four
sounds at once.    If I remember right old BASIC used to have four
sounds.
If there is a data base that allows sounds that would be a head
start.  If there were a data base of sounds that would be even
better.

    If it is possible for a data base to call up 16 sine sounds at
once I would be interested in that!!

    For creating beat rates I don't know why it can't be done by
using the actual frequencies.   Of course they would have to have
the right partials, ie , for 3rds each tone would have to have the
4th and 5th partial.
    So the question returns to, if two pure sine sounds are played
together, will beats result?    Pure "sine sounds"   means absence
of upper partials.
Or would the loudspeaker diaphragm or headphone speakers vibrate
in partials also?    ---rm



----- Original Message -----
From: Bill Ballard <yardbird@vermontel.net>
To: Pianotech <pianotech@ptg.org>
Sent: Friday, January 03, 2003 12:07 AM
Subject: Re: Excel beeps


> At 9:04 PM -0800 1/2/03, Jason Kanter wrote:
> >Please give it a try...
> >...........
> >..  jason kanter . jason.kanter@wamu.net .
jkanter@rollingball.com
> >
> >>  At 4:06 PM -0800 1/1/03, Jason Kanter wrote:
> >>  >Anyone know how to program Visual Basic in Excel to produce
x beeps
> >>  >per second?
> >>
> >>  I could write it as a loop in my database.
> >>
> >>  Bill Ballard RPT
> >>  NH Chapter, P.T.G.
> >>
> >>  "Trust me, you've got all the equipment, You just need to
read the manual"
> >>       ...........Reese Witherspoon in "Legally Blonde"
> >>  +++++++++++++++++++++
> >>
>
> What it would involve is a unit of sound (.wav or .aaif) say
1/30
> long. Then set up a "counter" variable to cycle things through
the
> correct number of loops, and one for the number of bps desired
(not
> nec . a whole number). One you've set the number of bps you want
t
> hear, that deterimnes a timed loop, in which the period is the
> inverse of the bps. Whatever the period of the beat rate (and
that
> could even be input as +/- ¢ with an anchor frequency), the time
> consumed by the 0.033 second sine wave .wav  would remain
constant.
> For 2.5 pbs, it would be 8.25% of the 0.4 sec period.
>
> That's how I would do it. I have no idea whether the database
app's
> connection to the OS would have its own inefficiency. 'Puter
> telephone dialing involves a delay of 4 sec between execution
and the
> internal modem dialing out. It's not just my database, it's the
Palm
> Desktop's phone dialer behaving that way too.
>
> Whether or not I could do it might or might not be useful to
you. I'm
> sure you don't have the Mac OS, and even if if polished up the
> beat-rate generator real swell, it would still be just a
database
> file required the app to run it. The cross-platform version of
this
> database does exist, but the value of such a eat-rate generator
would
> probably be far less than the price to you of the database to
run it.
> (Although for $50, I could register a run-time file distributed
only
> by the database's web site.)
>
> I agree it would be a fun project. Say, you wouldn't need this
this
> to be learning arual tuning by any chance? <g>
>
> Mr. Bill Ballard RPT
> NH Chapter, P.T.G.
>
> "I gotta go ta woik...."
>      ...........Ian Shoales, Duck's Breath Mystery Theater
> +++++++++++++++++++++
> _______________________________________________
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