[sdiy] simple saw or sine osc?

[Scott Nordlund]

Sine waves are most often used for ring modulation since they contain only the fundamental frequency (ideally), so you get a sideband shift by one specific frequency.  Triangle waves could also be used to similar effect.  

Saw and square waveforms are less often used when ring modulating as a sound effect (on guitar, vocals, piano..), because you get a sideband shift of each harmonic of the saw/square wave (by superposition) and the result can sound too disorganized and buzzy with many discontinuities.  They still work well for oscillator-to-oscillator modulating (in fact many "ring modulators" in synths are just an X-OR function on square waves).

The waveform you want to use really depends on what you're using it for.

----------------------------------------
> From: subjectivity at hotmail.com
> To: tim.parkhurst at gmail.com; synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] simple saw or sine osc?
> Date: Tue, 8 Sep 2009 01:07:01 +0000
> CC:
>
>
> thanks
>
> i had forgotten about your lfo post
>
> i had thought about the 40106 vco but in my tests i never got it to give a saw
>
> of course this begs the question..what IS the best waveform choice for ring mod/sideband modulation stuff?
>
> i have found that square and tri dont work too wel
>
>
>
>
>
> --------------------------------------------
> check out various dan music at:
>
> http://www.myspace.com/lossnyc
>
> (updated monthly)
>
> http://www.soundclick.com/lossnyc.htm
>
>
>
> http://www.indie911.com/dan-snazelle
>
> (or for techno) http://www.myspace.com/snazelle
>
> ALSO check out Dan synth/Fx projects:
>
> AUDIO ARK:
>
> www.youtube.com/watch?v=TJRpvaOcUic
>
> www.youtube.com/watch?v=BqIa_lXQNTA&feature=channel_page
>
> www.youtube.com/watch?v=V4nJPjGgOcU&feature=channel_page
>
> and soundtrack/design work:
>
> NEW: check out Dan's sound design from the 1998 award winning film SAFARI by catherine chalmers
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> http://www.catherinechalmers.com/videos.cfm
>
>
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>
>> Date: Mon, 7 Sep 2009 17:53:12 -0700
>> Subject: Re: [sdiy] simple saw or sine osc?
>> From: tim.parkhurst at gmail.com
>> To: subjectivity at hotmail.com
>> CC: synth-diy at dropmix.xs4all.nl
>>
>> Hi Dan,
>>
>> You might check out my 8K LFO design, with the TSW wave shaper (both a
>> little more than half way down the page):
>> http://electro-music.com/forum/viewtopic.php?t=32372
>>
>> You could also try:
>> http://electro-music.com/forum/viewtopic.php?t=34940
>>
>> Or:
>> http://electro-music.com/forum/viewtopic.php?t=28799
>>
>> Hopefully one of these will do the trick!
>>
>>
>> Tim (does tricks, like Sit Up and Fetch) Servo
>> --
>> "Sire, the church of God is an anvil that has worn out many hammers."
>> - H.L. Hastings
>>
>>
>> On Mon, Sep 7, 2009 at 7:52 AM, Dan Snazelle wrote:
>>>
>>> hey there
>>>
>>> I need a one chip (maybe a tl072 or tl074 or 324) Sawtooth oscillator for a project I am building where
>>> I need a panel controllable Oscillator that can go into high enough frequencies to do nice FM/ring mod kind of stuff.
>>>
>>> It doesn't need to be voltage controllable although I wouldn't mind if it was.
>>>
>>> I think it needs to either be SINE or SAW because all the experiments I did with a TRI or SQR just arent getting me the right kind of
>>> "ring modulated/sidebands" sound I am after. (which is too bad as I couldnt just a 40106
>>>
>>>
>>> thanks so much
>>>
>>>
>>>
>
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