Tablatures
Harmonica Tablatures
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Principle
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A harmonica is a wind instrument which emits
sounds by the vibration of little blades or metal reeds.
Each hole of the instrument can be used to make
from 2 to 4 different notes. A different blade (i.e. a different pitch)
is selected according to whether the performer blows or draws in the
hole.
To select a given hole, the performer covers unwanted
holes with his tongue. He can also blow or draw in several holes at the
same time, to play a chord.
When blowing or drawing in several consecutive
holes, the performer can cover one or several contiguous holes so as
not
to play them.
All these techniques are used by the program
to compute harmonica tablatures.
Advanced techniques enable a blade to be played
at a different and higher pitch than normal: this is the overbend.
Some harmonicas have 4 blades for each hole, and
a bar called a slide enables the player to select the blades to use.
Harmonicas are split into two big families: chromatic
and diatonic.
Chromatic harmonicas can play any semitone over
several octaves, but the diatonic harmonica can only play a given set
of
notes. Diatonic harmonicas are tuned for a specific key, which is
generally
written on the top of the instrument.
Selecting the instrument
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Harmony-Melody offers a choice of five predefined
harmonicas.
You can also define a custom harmonica: click
"Define" and enter the note pitch for each hole.
A harmonica can have up to 20 holes on two rows.
Tablature computation
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Tablature computation,
i.e. the association between a note and the corresponding hole-breath
pair,
is configurable.
Allow bends: make the pitch vary from
the more high-pitched blade (with a tongue effect) almost down to the
more
low-pitched.
Allow overbends: with the more
low-pitched blade, plays the more high-pitched blade note + one
semitone.
Optimize for breath: it is generally
preferable to optimize for breath rather than for hole changes: it is
easier
to change hole than to change from blow to draw.
Display type
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There is no real standard for displaying harmonica
tablature. Breath indications can be written in many different ways.
Harmony-Melody
allows you to choose among the more common systems.
Adding notes
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To add notes to a tablature, select a note duration
(using the note
palette or a keyboard shortcut) and ensure that the editing mode is
note insert
mode.
Select a cell (you can use keyboard shortcuts 0-9, *;
/...) or click
the tablature staff with the Shift key depressed to make the possible
cell
list appear in a popup menu.
Move mouse pointer over the tablature. If you selected
the "two lines
according to breath" mode, cursor location indicates whether note is
drawn
or blown. Otherwise, you have to use keyboard shortcuts to specify
breath.
Bend, overblow and other effects can be selected through
a keyboard shortcut
too. By default, no key is defined by the program. Select
"Configuration>Edit
keyboard" to relate keyboard keys to commands you need for editing a
tablature.
You can delete or move a note the same way you do it on
a regular staff
.
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