Re: [Rosegarden-user] Note velocity values when interpreting w.r.t text dynamics, etc

[<ci...@gm...>]

Hi Glyn,

to give you an impression what kind of dynamic curves good master keyboards=
=20
can produce you can consult this manual

http://www.doepfer.de/pdf/LMK4_man.pdf

Cheaper keyboards just produce simpler curves.

On the synthesis side you can look into the codes from AMS, whysynth and/or=
=20
zynaddsubfx synthies.
If you plan to write a synth and not a guitar synth, than you should find a=
=20
keyboard player who uses your soundengine. It's a complete different thing=
=20
putting in some notes into the matrix editor or play life.

My 50 =A2 here

	///Chris(toph)


On Sunday 27 January 2008 13:22, Glyn Adgie wrote:
> I am currently working on a soft synth, and I would like to know how to
> scale waveform amplitude with respect to NoteOn velocity. To get an idea
> of what velocity values should mean, I wrote a test piece in Rosegarden,
> with a series of notes each having a different text dynamic, from ppp to
> fff, then used Adjust->Interpret to just apply text dynamics. The
> mapping from dynamics to velocity numbers looks kind of odd, with
> intervals between successive dynamics varying between 5 and 20, so it is
> neither a linear nor a log function. Here is the mapping:
>
> ppp =3D> 30
> pp =3D> 40
> p =3D> 60
> mp =3D> 80
> mf =3D> 90
> f =3D> 105
> ff =3D> 110
> fff =3D> 115
>
> Is this mapping related to some standard describing how MIDI keyboards
> should work? I presume some kind of log scaling of the raw velocity data
> occurs in MIDI controllers, but I do not know that for a fact. The MIDI
> specs I have looked at say nothing about velocity mapping, and the
> Soundfont spec is not much help either.
>
> Unfortunately, I do not have a MIDI keyboard to experiment with. I am a
> guitarist. I make all my synth music by writing scores in Rosegarden.
>
> Apologies for this being a bit off-topic for Rosegarden users, but I
> would appreciate some guidance on this.
>
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