Interestingly enough, Reson 6 came about from an instrument I made
called Mode 5 (later Mode 6).  I had a hard time controlling the
stability of the instrument as the resonances could last quite long
for the input which made them not work very well in the situation I
had where there was a constant input.  I do have a percussion version
of Mode 6 that does use the mpulse opcode as an exciter with a single
hit, but I don't really use percussive sounds so I'm not sure I ever
shared it on blueShare.  Otherwise, I do think using mode opcode for
percussion is great!

steven


On 8/19/07, Dave Seidel <dave@superluminal.com> wrote:
> Thanks, Steven, that's good to know, and it will be useful.  (BTW, I'm
> using a version of your Reson 6 instrument -- which is quite nice --
> modified to use an exciter based on the one in the mode example in the
> CS5 manual.  If I can get it to an acceptable state, I'll pass it back
> up to Blue Share.)
>
> - Dave
>
> Steven Yi wrote:
> > Hi Dave,
> >
> > Just a quick answer, you can do:
> >
> > p3 = p3 + 10
> >
> > or whatever value at the start of the instrument.  It'll have to be
> > all itime values.   However, I found that this was problematic with
> > blueX7 in the past and removed it though I don't know if that problem
> > has been fixed. (Something to do with turning off the notes, it would
> > spike the CPU).
> >
> > steven
> >
> >
> > On 8/19/07, Dave Seidel <dave@superluminal.com> wrote:
> >> Hi all,
> >>
> >> I'm having loads of fun with the mode opcode, which I'm using to make
> >> some very nice bell-like sounds (currently using the set of ratios for
> >> the 140mm Tibetan bowl[1]).  As a mode newbie, I have a couple of
> >> questions....
> >>
> >> 1. Q values -- Is there any rule of thumb for coming with these?  In the
> >> absence of any better idea, I've been going the 1/pitch-ratio, and the
> >> results are pretty good, but I'd love to know of there's a better approach.
> >>
> >> 2. "Natural" decay -- Since I'm working with bell-type sounds, it feels
> >> wrong to specify the duration of a note.  What I really want to do it is
> >> to allow the note to decay "naturally", like a physical object that is
> >> struck.  For now, I'm using the technique of allowing "extra" time in
> >> p3, and overlapping the notes (i.e, starting the next note before the
> >> previous note's time is up.  I guess this leads to two questions: First,
> >> is there any algorithm I can use to derive the resonance time (the
> >> manual states that "[t]he resonance time is roughly proportional to
> >> kQ/kfreq", but I'm not sure how to apply that).  Second, is there a
> >> technique for a Csound instrument to modify it's own duration other than
> >> "ihold", e.g, can I modify p3 within the instrument itself?
> >>
> >> - Dave
> >>
> >> [1] http://csounds.com/resources/modalFreqs.html
> >> --
> >> Send bugs reports to this list.
> >> To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk
> >>
> --
> Send bugs reports to this list.
> To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk
>