Dave Smith Instruments SYNTHESIZERS

Hi there,

I have been studying the Evolver for a while now and looking to buy 
one.

My main concern is lack of Sine waveform. I suppose I could sample 
one and drop it in, but I am surprised that an analog Sine wave is 
not included. Any thoughts?

When it comes to analog synthesizers usualy a selfoszillating filter creates the 
sine waveform...

On 28 Jun 2004 at 16:03, _5ht wrote:

> Hi there,
> 
> I have been studying the Evolver for a while now and looking to buy 
> one.
> 
> My main concern is lack of Sine waveform. I suppose I could sample 
> one and drop it in, but I am surprised that an analog Sine wave is 
> not included. Any thoughts?
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 


-- 

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Lack of a Sine waveform???  The first waveform in Osc 3 and 4 is a 
sine.  No, this sine is not analog, but since it IS a sine (i.e. no 
high frequency harmonics at all), it doesn't really have an aliasing 
problem in the usable range.  I don't miss the fact that it's not 
analog;  I use it a lot.  Check out this topic for names of the other 
digital waveforms if you're interested:

Digital Waveform Names -
http://www.ex5tech.com/ex5ubb_cgi/ultimatebb.cgi?
ubb=get_topic&f=23&t=000004

(Note:  If your email client or the Yahoo group splits the link(s) 
above onto two lines, you may need to copy/paste the link(s) into 
your browser address bar.)

If you're really bent on having an analog sine, then either:

1) drive the filter into self oscillation as previously recommended 
by Summa, or...

2) use a triangle wave, and run it though the filter with a low 
enough cutoff frequency to remove what few harmonics are present in a 
triangle, which will leave you with a sine.

Don't forget that with the filter "Split" parameter, you can vary the 
left/right filter cutoff frequency independently.  That will allow 
you to use a low cutoff in one channel (for your triangle/sine), and 
a higher cutoff in the other channel (for your higher harmonics 
sound).  Then just set the output pan to center, and you'll have a 
non-stereo monophonic sound with a mix of a sine wave and your choice 
of other waveform.

My best recommendation is to simply use the digital sines, though.  
That yields the most flexibility, and you won't miss the fact that 
the sine waves aren't analog (like you would with a saw, triangle, or 
square).


Ski
www.ex5tech.com
EX5Tech Evolver forum:
http://www.ex5tech.com/ex5ubb_cgi/ultimatebb.cgi?ubb=forum&f=23


--- In DSI_Evolver@yahoogroups.com, "_5ht" <_5ht@y...> wrote:

> Hi there,
> 
> I have been studying the Evolver for a while now and looking to buy 
> one.
> 
> My main concern is lack of Sine waveform. I suppose I could sample 
> one and drop it in, but I am surprised that an analog Sine wave is 
> not included. Any thoughts?