Orion ti-84+, User Manual

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4. Pressing the 2nd key followed by the Quit key will take you to the Home
screen regardless of the current active screen (Trace or Graph mode). This is
announced to you.
SonoGraph
SonoGraph refers to the announcement of the graphs in the form of audible tones.
SonoGraph is applicable only when Tone mode is selected and the active screen on
the TI-84 Plus is in Trace mode. Tone mode is when each plotted point of an equation
is made audible with a tone corresponding to its Y-coordinate. As you navigate (trace)
the plotted graph of the equation, tones are issued for each point. Alternately, the
entire graph for an equation can be heard by pressing both Orion Playback
Pref. key
and the Shift Shift key together.
Details are as follows:

The frequency of the tone generated corresponds to the Y-coordinate values of
the plotted points of an equation. * The balance between the left and right
speaker represents the x coordinate value. (The left-most point plays only in the
left speaker. As x increases,

The duration of the tone played for each point can be adjusted from the
Preferences menu. The default setting is 1 second.

For negative values of the Y-coordinate, white noise is mixed with the tone.
This setting can be changed in Orion Preferences.

For playback of the entire equation, tones are generated in sequence starting
from the minimum X-coordinate value to the maximum X-coordinate value; the
frequency of the tone corresponds to the Y-coordinate value of each point.

If you navigate to a coordinate value outside of the visible screen area, a tone
will not be generated. Instead, the coordinates are announced in speech format
regardless of the mode selected.

Regardless of the output mode (tone or speech), pressing the Orion
Repeat
Toggle Mode key always announces coordinates in speech format.

If the previous operation on the TI-84 Plus was switching equations (switching
between graphs), pressing the
Repeat key results in speech announcement of
the active equation along with the coordinate values.

While graphs are being plotted on the TI-84 Plus screen, the calculator is
"busy" and will not accept additional inputs. This is indicated with a series of
short beeps, until plotting is completed.
Y-Value Corresponding to X-Value in Trace Mode