The Logic Off Topic list

Actually, there is no definite relationship between the visual appearance of
a waveform and it's harmonic content.  This is because waveforms with the
exact same harmonic content, where the phase relationships are different,
will look totally different but sound exactly the same.  There have been
published studies concerning this, from the AES and IEEE among others.

Now, with regards to 'classic' synthese waveforms and their harmonic
content, check out this site: http://www.sonicspot.com/guide/synthesis.html


> From: yoonchinet@...
> Reply-To: logic-ot@yahoogroups.com
> Date: Sun, 07 Oct 2001 21:34:32 -0000
> To: logic-ot@yahoogroups.com
> Subject: [L-OT] Re: SOUNS SYNTHESIS
> 
> --- In logic-ot@y..., DbbBrook@a... wrote:
>> HELLO EVERY ONE THIS IS MY FIRST QUESTION SO LETS HOPE IT GETS A GOOD
>> RESPONSE.
>> 
>> Can any one explain to me the relationship between harmonic content and
>> waveform of sound waves?
>> 
>> I know what various waveforms are just don't know the relationship between
>> harmonic content.
> 
> Hey Debs,
> The answer is easy: more harmonic content equals high density of waves that
> resemble noise. White noise has signals of all frequencies at equal
> amplitude/strength. So the more a signal resembles noise the higher it's
> harmonic content. Now, a square wave also has a high harmonic content, so does
> a sawtooth wave. The difference between these waves and white noise is that
> the frenquencies are not equal in amplitude.
> So, if you see a waveform that resembles white noise, you know that the
> waveform has equal representation of all frequencies.
> Hope this answers your question,
> Yoonchi.
>