Interesting, when I taught Musical Acoustics at the U of
Arizona, Backus was my required text and the other two
topped the reading list.

-- 
Chip Wood

"Ben Bradley" <ben_nospam_bradley@frontiernet.net> wrote in
message
> May I
> suggest reading one or more of these books:
> "The Acoustical Foundations of Music" John Backus
> "Horns Strings And Harmony" Arthur H Benade
> "Music, Physics and Engineering" Harry F. Olson

On Thu, 27 Oct 2005 08:40:56 -0500, "jeanbaptiste36"
<jeanbaptiste36@hotmail.com> wrote:

>I was wondering how one changes the timbre of a sound without changing the
>pitch.

   This has the faint odor of a homework question, but even presuming
it's not, the question shows a lack of understanding of the
relationship between timbre and harmonic content, and (as others
indicated) the many ways harmonic content can be changed. May I
suggest reading one or more of these books:
"The Acoustical Foundations of Music" John Backus
"Horns Strings And Harmony" Arthur H Benade
"Music, Physics and Engineering" Harry F. Olson

It's been a long time since I read the first two, and I don't even
recall reading the third, but they should help. Also, read a few
things on how music synthesizers work.

>Igor
>
>

jeanbaptiste36 wrote:
> I was wondering how one changes the timbre of a sound without changing the
> pitch.
> 
> Igor
>
Igor,
You can generate new harmonics by distorting the waveshape.

Also, try AM and/or FM modulation of the sound by a low-frequency waveform.

Regards,
John

jeanbaptiste36 wrote:
> I was wondering how one changes the timbre of a sound without changing the
> pitch.
> 
> Igor
> 
> 
> 

dude! you're spoilt for choice.

if i were you i'd first decide _what_ sort of change in timbre you desire.

obvious ideas... EQ, play it backwards, non linear changes in amplitude 
  etc.

-- 

Matthew,

Torture Yourself - http://www.burnttoys.co.uk/

jeanbaptiste36 wrote:
> I was wondering how one changes the timbre of a sound without changing the
> pitch.
> 
> Igor

One alters the relative strengths of the harmonics. There are many ways 
to so that, not all of them electronic.

Jerry
-- 
Engineering is the art of making what you want from things you can get.
&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;&#4294967295;

in article u4WdnexSlPx1Rf3eRVn-hg@giganews.com, jeanbaptiste36 at
jeanbaptiste36@hotmail.com wrote on 10/27/2005 09:40:

> I was wondering how one changes the timbre of a sound without changing the
> pitch.

filter it?

-- 

r b-j                  rbj@audioimagination.com

"Imagination is more important than knowledge."