[linux-audio-user] hermes input?

Eric Dantan Rzewnicki eric at zhevny.com
Tue Sep 14 21:45:45 EDT 2004


Steve Harris wrote:
> On Tue, Sep 14, 2004 at 01:47:55 -0400, Eric Dantan Rzewnicki wrote:
>>I got about half way through an ecasound set up for controlling many of 
>>hermes' 52 parameters with midi controllers and noticed the "input gain"
>>control. I was under the impression hermes could run as a stand alone 
>>synth. But, I guess the name it bears, "hermes filter", might suggest
>>otherwise. I tried to catch Steve on irc today, but kept missing him. 
>>Does anyone know if the input is optional for hermes?
> I think it is yes, http://plugin.org.uk/hermes.png

Ah, thanks for the .png. That is very helpful.

> but hermes is probably fairly buggy, it mainly exists to prove a point
> (that host generated GUIs are next to useless for some things).

Well, I'm going to try to use it to prove the point that no GUI is 
needed at all. :) I'll see what I can get it to do. I'm also thinking of 
using it as a model for a stripped down, simpler version. Probably with 
a single Osc->Dist->Filt->Delay->Out signal path to start.
                       ^
                       |
                      LFO

I figure that will make debugging some issues easier. Who knows, I might 
even come up with something useful to others. At the very least it will 
be a good learning experience.

When I first heard about your xml build system for lasdpa plugins I 
thought it sounded like a crazy idea. Now that I've actually looked at a 
number of the .xml files and compared them briefly with the generated 
.so.c I realize I was simply ignorant. It looks like this system 
significantly lowers the bar for getting into DSP programming.

Previously I thought it would be several years more before I knew enough 
about programming before I would be able to start contributing. With 
your xml system and LADSPA it appears I might be able to dig in and 
start off focusing on learning about and comprehending the core DSP 
algorithms. I can learn all the housekeeping, gui and systems 
programming stuff more gradually. DSP programming is really what I'm 
most interested in. The rest of it seemed like a lot of dull drudgery I 
would have to learn first before I got around to the fun stuff. Using 
ecasound as my host I avoid a whole layer of GUI issues, too. Of course 
there is still the midi CC interface, but a GUI host would have to 
handle that as well and ecasound's implementation allready seems to work 
fairly well. At least for now, I'm not concerned about note events.

In short, I'm pretty excited. :)

Thanks Steve,
Eric Rz.



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