Here, "left sub" indicates a subscript area on the left hand side of x. This area is skipped in
the case b. If there were letters in this area, they would be read with the rising intonation
before the base character in the case a.
Fraction, a plus b over c is read aloud in the following ways:
a. When reading it straight through, "frac a+b over c"
b. When reading it character by character from beginning to end, "frac, numerator a, plus b,
end numerator, denominator c, end denominator"
c. When reading it character by character from end to beginning, "denominator, c,
numerator, b, plus, a, frac"
Example5: Simple Radical
The square root of 2 is read aloud in these ways:
a. When reading it straight through, "square root of 2"
b. When reading it character by character from beginning to end, "radical, inside radical 2,
end inside radical."
c. When reading it character by character from end to beginning, "inside radical, 2, radical"
Example6: General Radical
The nth root of a is
a. When reading it straight through, "index n root of a"
b. When reading it character by character from beginning to end, "radical, radical index n,
end radical index, inside radical a, end inside radical."
c. When reading it character by character from end to the beginning, "inside radical, a,
radical index, n, radical"
Example7: Special Symbols with Superscript and/or Subscript (1)
A summation from k=1 to n is read aloud in the following ways:
a. When reading it straight through, "summation from k=1 to n of"
b. When reading it character by character from beginning to end, "summation, under k, =, 1,
end under, over n, end over"
c. When reading it character by character from end to beginning, "over, n, under, 1, =, k,
Example8: Special Symbols with Superscript and/or Subscript (2)
An integral from a to b is read aloud in the following ways:
a. When reading it straight through, "integral from a to b of"
b. When reading it character by character from beginning to end, "integral, sub, a, end sub,
super, b, end super"
c. When reading it character by character from end to beginning, "super, b, sub, a, integral"
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Example9: Special Symbols with Superscript and/or Subscript (3)
A limit of x approaching 0 is read aloud in the following ways:
a. When reading it straight through, "limit as x right-pointing Arrow 0 of."
b. When reading it character by character from beginning top to end, "limit, under, x,
right-pointing Arrow, 0, end under."
c. When reading it character by character from end to beginning, "under, 0, right-pointing
Arrow, x, limit"
A 2 times 2 matrix enclosed with parentheses is read aloud in the following ways:
a. When reading it straight through, "left paren, line of 1 a b, line of 2 c d, right paren"
b. When reading it character by character from beginning to end, "left paren, a, b, new line,
c, d, new line, right paren"
The message "new line" indicates a special line break in the array representation. You can
move the cursor not only horizontally but also vertically in the matrix to browse it.
4.3 Speech Setting and Related Commands
Some commands in the Setting menu allow users to customize the setting concerning speech
4.3.1 Voice Setting
If several kinds of SAPI5 voices were installed in your PC, you could change the default
voice for each of a text and math parts with the "Speech Setting" in the Setting menu. You
can also change the volume, the pitch and the rate of aloud reading.
4.3.2 Other Settings and Commands Concerning math Reading
If "Read Menu" in the Setting menu were not checked, menu items such as the symbol list
would not be read out.
You can suppress speech output of "space" and "return" by pressing Ctrl + F8 key or using
"Read Aloud Line Break Marks" in the Setting menu.
If "Read Entire Line" in the menu were checked, entire contents up to a carriage return line
feed would be read out when the cursor would come to that line.
If "Automatically Reading Mode" were checked, the cursor would move ahead automatically,
and contents would be read out without cursor operations.
With "Read Out" menu commands, you could also listen to a content without cursor
operations. However, in this case, the cursor would keep its original position.
Using a shortcut: the Ctrl + Alt + H, you can check the font style such as bold, italic.
Incidentally in math expressions all alphanumeric letters are math italic.
In the Setting menu, there are also other useful commands such as ones concerning
4.3.3 Aloud-Reading Table Editor
Using this editor, you can change a way in which each symbol is read aloud. The "Default"
button cancels all of the customization made by the user. You may save a customized table
in another name and apply it with "Select Reading Table" in the Setting menu.
4.3.4 Edit Math Reading
You can edit how to read math syntaxes are read aloud from beginning to end (not
character-by-character). The default definition file named "ReadSetting_SAPI5_En.txt" is
You may edit it by using any text editor. You can customize all of the three types of aloud
reading for math syntaxes. In addition, the manner of aloud reading of each math symbol
also can be edited on this text file. The result is automatically reflected in the definition
table of them.
4.3.5 Reload Math Reading
While ChattyInfty is running, the new definitions can be reload with this command.
4.3.6 Assigning Another Manner of Aloud Reading
There are many math formulas that have ambiguity in reading out them. For instance, a
mixed fraction could be read as the product of an integer and a fraction. X squared could be
read as the second component of a vector. We often have to assign them an appropriate
manner of aloud reading, according to their context. Unfortunately, however, since it is
impossible to assign the appropriate aloud-reading to them automatically, we do need a new
way to handle how to read out each symbol or math formula locally according to their context.
We refer to this new concept of assigning a pronunciation as "Yomi" (a Japanese word that
means "a manner of aloud reading"). We actually give a concrete method to assign Yomi to
math expressions in ChattyInfty3.
After selecting a certain part of a math formula, press the Shift + Ctrl + Down key; then, a
dialog to assign Yomi will appear. You can give any word description for the part with it.
You also can open the Yomi dialog with "Open Yomi Setting" in the Format menu.
Instead of Yomi, pressing the Shift + Ctrl + Up key opens a "Ruby Setting" dialog. Ruby is
similar to Yomi; however, a word description assigned as Ruby is displayed explicitly by the
side of an original formula while Yomi is not. Ruby is very useful in a Japanese text;
however, we do not think it would also need in English.
5. View Menu
5.1 Last Reading Bar
"Last Reading Bar" is a one-line window to show a character string of sentence that
ChattyInfty has just spoken. You can open this window with the View menu and move to it
with the F6 or Ctrl + F6 key.
5.2 LaTeX Source Bar
"LaTeX Source Bar" is a one-line window to display a character string of LaTeX source that
corresponds to the line the cursor is currently located. You can open this window with the
View menu and move to it with the F6 or Ctrl + F6 key.
6. Setting Menu
There are many useful commands available with the Setting menu other than ones described
up to now.
6.1 Standard Font Selection
The user can select the font and the size to be used by ChattyInfty. It will be applied to the
6.2 Option Setting
Using the "Text/Math Change Shortcut," you can choose one of the following 2 ways to
switch the Text/Math modes:
a. Ctrl Key You can switch the Text/Math modes by pressing the Ctrl key only,
b. Ctrl + Space key You can switch the Text/Math modes by pressing a Space key
together with the Ctrl key.
Using the "Backslash Command in Text mode," you can choose the role of backslash key in
the text mode. It could be either the symbol of backslash itself or the prefix of LaTeX
Using "Cursor Order in fraction," you can if cursor will move first to the numerator or the
When the "Space Mark" for "Text mode space," "Math mode space" or TeX mode space are
checked, spaces will be marked in color so the reader will know their location.
If "Ctrl + Up/Down to Super" were checked, the Ctrl + the Up Arrow key would be a shortcut
to move the cursor to the superscript position. Pressing the Up Arrow key alone would
simply move the cursor to the previous line.
6.3 Convert Options
6.3.1 Import Group
In this group, you can choose the formats to be imported to ChattyInfty. Only the checked
items will appear in the Import command in the File Menu.
The choices are
a. LaTeX Source Import - a LaTeX formatted file can be converted IML format and be
loaded to ChattyInfty. A LaTeX command that ChattyInfty cannot convert is imported as
in TeX mode.
b. OCR-file(KML) Import - a recognition result file of ChattyInfty, KML file, can be
loaded to ChattyInfty.
6.3.2 OCR Import Group
In this group, you can choose sources which can be recognized by ChattyInfty and set some
parameters for the recognition.
a. Import from Scanner You can recognize documents by ChattyInfty via a scanner.
b. Import from Image File You can recognize documents as page image files.
These items appear in the Import command of File menu if you checked them.
c. Delete KML after OCR ChattyInfty saves recognition results in a KML file.
If you check this option, ChattyInfty deletes the KML file after recognition.
d. Include Image Areas ChattyInfty saves images included by a recognized document in
a KML file.
6.3.3 Export Group
In this group, you can choose some kinds of formats to be converted from edited documents
by ChattyInfty. Only checked items appear in the Export] command of File menu.
a. LaTeX Output An edited document can be saved in LaTeX format.
b. HTML Output An edited document can be saved in HTML and each mathematical
expression will be saved as an image file.
c. MathML Output An edited document can be saved in MathML.
d. Human Readable TeX Output An edited document can be saved in Human Readable
TeX (HR-TeX). In the HR-TeX, mathematical expressions are described in LaTeX
format, but some LaTeX commands that are not needed to describe context of a
document (e.g. environmental commands, layout comments, etc.) are omitted.
e. Karlsruhe AMS-notation Output - Karlsruhe AMS (ASCII Mathematik Schrift) is
developed in Karlsruhe University to describe mathematical expressions only using
6.4 Math Level
The math levels are:
Junior high school math,
Senior high school math,
Since ChattyInfty provides many symbols for highly technical materials, setting the correct
level limits the choices of symbols.
7. Using ChattyInfty with Other Screen Readers
7.1 Using ChattyInfty with JAWS
Since the current version of ChattyInfty could read out all the contents and menus, you might
not need to utilize another screen reader with ChattyInfty if you hoped math access with
speech output only. However, if you would like to make use of a Braille display, you would
have to use a screen reader such as JAWS along with ChattyInfty since it has no function to
output Braille directly. When ChattyInfty is used with JAWS, some conflicts between their
speech outputs will take place.
In order to avoid the speech conflictions, we prepared JAWS's script files for ChattyInfty. If
necessary, please install them in the following manner.
Put three script files included in the package of ChattyInfty into the setting folder of JAWS
for each local language. For instance, the setting folder in English OS might be:
Since Windows7, JAWS scripts installed in a certain user’s account does not work for the
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