Subject: Re: [linux-audio-user] Re: [QMidiArp] README found
From: Mark Knecht (markknecht_AT_comcast.net)
Date: Tue Aug 24 2004 - 02:18:22 EEST
Matthais,
Thansk for the pointer. I think of the two that midiAp.c is pobably
closer to what I'm looking for. Now I have to see if I can compile it. I
guess this is then jsut a command line app. Presumably it still shows up
in QJC so that I can route to it?
Thanks,
Mark
On Tue, 2004-08-24 at 03:20, Matthias Nagorni wrote:
> Hello Mark,
>
> I take this back to the list because it seems I have to explain the
> approach that QMidiArp uses in a bit more detail...
>
> On Mon, 23 Aug 2004, Mark Knecht wrote:
>
> > I'm having some trouble with the pattern syntax. Let's says that I want to
> > create an arpeggio based around just playing and holding a single key but
> > creating a series of non-overlapping notes within an octave or two.
> >
> > Play and hold: C4
> >
> > Hear: (quarter notes at tempo) C4, E4, G4, C5, E4, C4, G3, C3
> >
> > and when I release C4 the pattern stops immediately.
> >
> > the arpeggio should always be based around the single key I'm playing, so if I
> > play a G3, I'd hear G3, B3, D4, G4, B3, G3, D3, G2
>
> An example of this kind of arpeggiator is miniArp, an example of my ALSA HowTo
> http://www.suse.de/~mana/alsa090_howto.html#sect07
>
> If you look at its simple pattern synthax you'll find that notes are
> explicitely defined (IIRC on base note C). And here the pattern is
> transposed whenever you press another key on the keyboard.
>
> However QMidiArp works differently. It is based on my experience with the
> MAP1 hardware arpeggiator. The MAP1 takes the notes into which the pattern
> is translated from the chord that you play on the keyboard. This way you can
> play whatever complicated chords with the most complicated alterations and
> the arpeggiator will still perfectly follow it.
>
> I already have an extension to QMidiArp in mind: There could be an
> additional tab that would have radiobuttons to select chords, like
> e.g. M, m, 7, M7, m7, ... This could then serve to fill the note buffer
> that the arpeggiator uses for its pattern. But then you would have to
> manually change the chord whenever you do a modulation.
>
> Matthias
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