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**To**:**<Loopers-Delight@loopers-delight.com>****From**:**"jondrums" <jondrums@hotmail.com>****Subject**:**Re: Looperlative LP1 - sample rate****Date**:**Thu, 15 Dec 2005 15:09:51 -0800**

>> Basically a square wave at any frequency contains all frequencies at >> varying levels. Doesn't make much sense, but its true. A sin wave >> contains exactly one and only one frequency. jon. > > A square wave is a wave that contains two states (one of which may or >may > not be zero) the effect of the "squaring or squareness" of these waves >is > the inclusion of a series of harmonics including the octave and all odd > order harmonics above the octave into a theoretical infinity. The first > harmonic being the octave (or for instance 30k above a 15k square wave) You are absolutely correct. I guess I wasn't thinking straigh when I made the above comment. However.... a square wave can excite all kinds of frequencies which are not harmonics if other things in the system have a resonance. An example: hitting a curb with your car. This is like a square wave for the suspension system - but your car will bounce at the resonant frequency of the suspension. I use square waves all the time in physical systems to excite and find resonances. Another example more related to audio is when a sound engineer will walk around the room and clap. The clap is an pressure wave impulse (sound)very similar to a square wave and will excite resonances in the room that the engineer can then listen for. > Something that contains all frequencies is called "noise". White noise > contains all those frequencies evenly. right again! Jon

**Follow-Ups**:- Re: Looperlative LP1 - sample rate
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*From:*Ronan Chris Murphy <looper@venetowest.com>

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