Dave Smith Instruments SYNTHESIZERS

Don't forget the obvious:
 
If the low pass filter is set to too low of a frequency, you won't hear
any changes with the highpass filter, as there aren't enough highs to
hear a difference.. 
 
You may want to manually check the interaction between all the filter
settings, including the LPF filter envelope and envelope amount, before
modulating the HPF. 
 
-----Original Message-----
From: ski_ex5tech [mailto:ex5tech@...] 
Sent: Sunday, March 30, 2003 1:30 PM
To: DSI_Evolver@yahoogroups.com
Subject: [Evolver] Re: Mod destination highpass
 
Stefan - Other than what thligrdd already mentioned, there are two 
possibilities for why you may not be hearing any effect:

1) If your highpass filter is set anywhere from i00 to i99, it only 
affects the external input.  See the quote from the manual below:

************

Highpass: 3 5 S o0.99, i0.99 Sets the cutoff frequency of the four-
pole highpass filter. If set to o00 to o99, the filter is placed 
after the analog lowpass filter and VCA, before the Delay. If set to 
i00 to i99, the highpass filter is inserted before the analog lowpass 
filter, and only affects external input. Refer to the Signal Flow 
diagram on page 10. There are two separate highpass filters, one for 
each channel, that are controlled in tandem.

Remember that any of the modulation sources can be routed to the 
Highpass Filter; for example Envelope 3 can be dedicated to the 
Highpass.

************

2) I remember Dave telling me long ago in an email that the highpass 
filter sometimes didn't function if you use long delay times (or 
maybe something else that is DSP intensive).  I THINK this was only a 
problem with beta units, and that the production units (with their 
larger DSP chips) always work correctly.


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


--- In DSI_Evolver@yahoogroups.com, "thligrdd" <onthesurface@c...> 
wrote:
> I don't have my evo with me, but if I remember correctly, one has 
to 
> set the hipass filter above zero for modulation to affect it. So 
just 
> set it to 1 and you should be cool. Come to think of it, that 
> probably falls under the category of 'bug'. A very small bug, but 
one 
> nonetheless. 
> 
> --- In DSI_Evolver@yahoogroups.com, trippler@t... wrote:
> > I don't seem to receive an audible effect if I choose highpass as 
> modulation
> > destination. Any ideas what I'm doing wrong ?
> > 
> > Regards
> > Stefan
> > www.trippler.net/music





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