[LAU] [LAD] [LAA] Mamba - Virtual Midi keyboard for Jack Audio Connection Kit release 1.8

Robert Vogel vogelrl at gmx.com
Fri Nov 27 00:01:29 CET 2020

Mamba is excellent, but you could be interested:

In GMorgan there is an accordian-like keyboard option.

Using the Mouse and computer keyboard:

In the musical keyboard part, click on the note.

- Left Click -----------> Maj7
- Right Click ----------> °7
- Shift + Left Click ---> 7
- Shift + Right .Click -> 7(Sus4)
- Ctrl + Left Click ----> m7
- Ctrl + Right Click ---> m7(b5)
- Shift+Alt+Left Click -> +7
- Shift+Alt+Right Click > 6

GMorgan is freely downloadable from Sourceforge. See page 43 [V.B.1- The
Keyb Window] of the pdf documentation.


On 11/24/20 5:52 AM, Hermann Meyer wrote:
> Am 24.11.20 um 11:40 schrieb David Kastrup:
>> Hermann Meyer <brummer- at web.de> writes:
>>> Mamba release v1.9 is out
>>> Mamba is a Virtual MIDI keyboard with some extended, unique features.
>>> This is a quick fix release as I've forgotten to implement jack MIDI
>>> input forwarding to ALSA MIDI output.
>> Stupid question: I see you implemented different national keyboard
>> layouts that basically define a mapping from characters to physical key
>> positions.  I think that raw X11 key events might actually encode key
>> positions (or numbers based on a particular arrangement of keys) but
>> maybe they are not easily available at the layer your key events arrive.
>> But the actual question is a different one: have you considered offering
>> a chromatic button accordion arrangement "on top" of that national
>> remapping?
>> Basically it would mean that a chromatic scale is encoded as
>> zsexdrcftvgybhunjimko,lp.;[/'] for C system (with a qwerty keyboard,
>> starting at C) and
>> qazwsxedcrfvtgbyhnujmik,ol.p;/ for B system (again, starting at C).
>> Finnish G system uses the same scale as C system apart from starting
>> with C♯ rather than C in the first row.  I can provide images if
>> necessary (there are some at
>> <https://en.wikipedia.org/wiki/Chromatic_button_accordion>).
>> Modern CBA keyboards tend to have 5 rows but the inner 2 rows are
>> repeats for making transposition and chord fingerings easier and
>> basically every player can get along without them at least when doing
>> note entry.  So whether to offer more than 3 rows depends on whether
>> there is an actual use for the numbers and function keys.
>> The main advantage for CBA players of course is easier entry. The main
>> advantage for everyone else would be access to more notes at the same
>> time.
> That's why the custom Keymap editor is implemented, so you could create
> the key map which best suite you. The given implemented key maps been
> just the essentials.
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