[gmpi] Re: Parameters / controls / GMPI event system - refreshment

On Sun, Dec 04, 2005 at 07:41:12PM -0500, Ron Kuper wrote:
> IMO the host should also set VID's (or whatever you name these "IDs") to 
> match the composer's intent.  synth will interpret based on the patch in 
> use, and some hosts will be dumb and treat voices like channels.  But the 
> intent of VID's should be for hosts to specify polyphony, articulation and 
> post-note-on changes.

I think that you and I are in agreement, then.

> ----- Original Message ----- 
> From: <thockin@xxxxxxxxxx>
> To: <gmpi@xxxxxxxxxxxxx>
> Sent: Sunday, December 04, 2005 6:06 PM
> Subject: [gmpi] Re: Parameters / controls / GMPI event system - refreshment
> 
> 
> >On Sun, Dec 04, 2005 at 08:46:58AM +1300, Jeff McClintock wrote:
> >>>>Isn't the easiest solution to re-use a VID?
> >>>>
> >>>>Note-On VID 0  G4
> >>>>Note-On VID 0  G4
> >>>>Note-On VID 0  G4
> >>>>Note-On VID 0  G4
> >>>
> >>> Again, this solves *this* problem but breaks the truly polyphonic mode 
> >>> of
> >>> operation.  How do you reconcile that?
> >>
> >>I'm saying the point of VID is that they give the *sender* the choice:
> >
> >And I think the sender owning the decision is wrong - it's dependant on
> >the patch.  HOWEVER - you make an interesting use case here.
> >
> >>This score requires a solo trumpet...
> >>
> >>Note-on VID 0  G4
> >>...
> >>Note-on VID 0  G4
> >>...
> >>Note-on VID 0  A4
> >>
> >>This score requires a trumpet trio
> >>
> >>Note-on VID 0  G4
> >>...
> >>Note-on VID 1  G4
> >>...
> >>Note-on VID 2  A4
> >>
> >>Same patch, same notes, different *intention*.
> >
> >Right.  But if the trumpet patch you use doesn't support polyphony
> >(because hey - it's a trumpet), then these two are the same, regardless of
> >your intentions.
> >
> >>Yes I agree, a piano patch, fed a non-challenging score could figure out
> >>which voices to allocate.
> >>  A guitar however can't, each string supports an overlapping range of
> >>pitches, each string is independently bendable, power-chords
> >>deliberately use the same pitch on two strings.
> >>
> >>A guitar-synth needs explicit help allocating pitches to the correct
> >>string...
> >
> >We've already established that guitar synths are special, and a reasonable
> >answer is to do 1 string per channel.
> >
> >>The musician can switch-off keyboard-style VVID allocation.
> >>
> >>He should have a range of possible VVID assignments schemes including:
> >>-keyboards score mode
> >>-solo score
> >>-one-voice-per-note-in-the-score-mode
> >
> >OK.  I think already said this, but this sounds fine to me.  The host can
> >provide this explicit VPID re-use (as a feature).  This isn't part of the
> >spec, I think, but a good thing to have worked out.
> >
> >Tell me if this sounds right, just as an example, sticking with the above
> >use case:
> >
> >This score requires a solo trumpet.  The host sequences notes that are
> >explicitly tied together, somehow.  The user explicitly connected the
> >notes.
> >
> >Note-on VPID(0)  G4
> >Note-on VPID(0)  G4
> >Note-on VPID(0)  A4
> >
> >This score requires a trumpet trio.  The host sequences individual notes.
> >
> >Note-on VPID(0)  G4
> >Note-on VPID(1)  G4
> >Note-on VPID(2)  A4
> >
> >>ALL GMPI synths should respond the same simple way:
> >>-new VVID     = assign new real-voice
> >>-re-used VVID = re-use real voice  (internal voice limit allowing)
> >>
> >>That's my take anyway.
> >
> >This is the only thing I disagree with - re-using a VPID is a suggestion
> >to the plugin about the relationship between voices.  The plugin can
> >choose to re-use the real voice or not, as it makes sense.  The example
> >trumpet synth above would choose to re-use voices with re-used VPIDs.
> >
> >Does that taint your model too much?
> >
> >I'm still working on an animation.
> >
> >>thockin@xxxxxxxxxx wrote:
> >>>On Sat, Dec 03, 2005 at 06:56:41PM +1300, Jeff McClintock wrote:
> >>>
> >>>>floorf(pitch) on the 2nd note to determinin which (real) voice to 
> >>>>steal.
> >>>>
> >>>>What if I'm using a micro-tonal scale with say 24 pitches per octave (
> >>>>0.5 semitones per key).
> >>>>
> >>>>Won't your scheme steal the wrong voice?
> >>>
> >>>
> >>>It might, but if you are using a microtonal scale you sould have to
> >>>substitute your own function for floorf() to round to the nearest pitch.
> >>>
> >>>
> >>>>Isn't the easiest solution to re-use a VID?
> >>>>
> >>>>Note-On VID 0  G4
> >>>>Note-On VID 0  G4
> >>>>Note-On VID 0  G4
> >>>>Note-On VID 0  G4
> >>>
> >>>
> >>>Again, this solves *this* problem but breaks the truly polyphonic mode 
> >>>of
> >>>operation.  How do you reconsile that?
> >>>
> >>>Tomorrow I'll get a better animation of what I mean, and I think you'll
> >>>all say "oh! that's what he meant."
> >>>
> >>>Tim
> >>>
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> >>>
> >>>
> >>
> >>
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> >
> >-- 
> >Tim Hockin
> >thockin@xxxxxxxxxx
> >Soon anyone who's not on the World Wide Web will qualify for a government
> >subsidy for the home-pageless.
> >
> >----------------------------------------------------------------------
> >Generalized Music Plugin Interface (GMPI) public discussion list
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> 
> 
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-- 
Tim Hockin
thockin@xxxxxxxxxx
Soon anyone who's not on the World Wide Web will qualify for a government 
subsidy for the home-pageless.

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