Select Sounds and Speaker On/Off are different: just click on them to activate/de-activate.
* Use the left edge Signal Control Tool bar buttons to change sound settings characteristics. 
* These buttons will modify only one sound at a time.

SOUND PROFILES

FIND THE SIGNAL YOU WANT A SOUND FOR,
HIGHLITE AN OBJECT WITH THE SIGNAL.
SELECT THE SOUND ICON ABOVE THE ‘SPEAKER’ ICON.

Some sounds allow you to choose a sound above or below threshold, or continuous.

You  can switch sounds, too, as long as the new sound is not already on the Sound List for another signal.

If you choose 'voice and Music' you can play a wave [.wav] audio file or a folder of wave files. In practice, this has rarely been used.

Basic midi sound management is also possible - you can select a midi sound from the top menu, and adjust its signal change rate linked to notes per step, the delay between notes, pitch range, reference note link, and reference pitch. These adjustment are best done by someone knowledgeable in sound production. Midi sounds each have different characteristics, and can appear to stop working if you set the wrong parameters.

SOUNDS are of many types in PHYSIOLAB. In this section we look at the library of simple sounds, each linked to a single signal. To find a Sound Library, first click on a signal, then find and open the Sounds button. If there is no button, sounds are not enabled on that screen. If the Sound Window opens, check a single sound to begin. Then view the other options, like above or below threshold, and sound type.  Then enalbe the Speaker button to enable.
NOTE: If you select a sound and it works, then you select another sound and the sounds stop, even though both are checked, you have saturated the amlifiers and must restart. The long term solution is to install USB sound speakers. The do not saturate the amplifiers.

The numbers in the Lowest/Highest Pitch Boxes represent notes on the musical scale. 
* The usable range is approximately 20 for the lowest pitch to 100 for the highest pitch.
* The most audible and pleasant range will vary for each instrument.
* Each instrument has its own preset values, but you may wish to experiment and modify these to find a desirable range for each instrument.

Reference Note Pitch Scale:
The current Note played always represents the difference between two signal values -  the current signal value and one of three reference values listed below:
(1) the signal value at the point when you clicked “Adjust Reference”, or
(2) the scale value at the bottom of the display,
or
(3) the threshold value.

The Sound And Game Control Drop-down List displays all available built-in musical instrument sounds. These have a pitch scale similar to a piano keyboard.

The Set Reference Pitch slider changes the value of the reference note (displayed in the small box to the right).
* The slider is only movable between the values specified in the Lowest Pitch and Highest Pitch boxes. 
* The reference pitch is the note that will be played when the current signal value equals the selected reference value.
* Musical pitches will go up or down from this reference pitch to the highest or lowest values specified in the Lowest Pitch and Highest Pitch boxes.

You can anchor the scale to either the “Fixed Signal Value”, the “Edge of Display” or the “Threshold Value” by clicking the small circle in front of your choice.  A dot will indicate your selection.

The Fixed Signal Value is the signal value at the point when you click the “Adjust Reference” button.
* If Fixed Signal Value is selected, the reference pitch note will be re-set to the current signal value whenever you re-click the Adjust Reference button.
* The number in the box to the left of the Adjust Reference button is the value of the reference pitch note.  * The number in the box to the right is the value of the current note.

If Edge of Display is selected, the reference pitch is anchored to the scale value at the bottom edge of the display, with musical pitches becoming higher from that point.

If Threshold Value is selected, the reference pitch (set with the slider) is anchored to the threshold so that the musical pitch goes up as the signal rises above the threshold and down as the signal falls below the threshold (unless Invert Pitch is selected).

Normally, if the signal goes up, the musical pitch goes up. Checking Invert Pitch causes the opposite: the musical pitch becomes higher as the signal values become lower and the musical pitch goes down as signal values go up.  With Invert Pitch selected the reference pitch should be set to a higher number.

The Signal Change Per Note Step value determines the number of units of change on the signal scale required to produce the next pitch.

The Delay Next Note value determines the time in seconds that must pass before the next note is played. The length of the note is dependent upon the musical instrument selected and is a fixed value that cannot be changed.

If Repeat Note is checked, the same pitch will be repeated when there is no signal change greater than the Signal Change Per Note Step interval.  If unchecked, the signal must change the amount specified in the Signal Change Per Note Step box before the next note will be played.

If Don’t Skip Note is selected, each pitch in the musical scale will be played with the time interval delay specified in the “Delay Next Note” box between each note.  This provides a gradual, musically pleasing transition between pitches, but can cause the pitch to lag behind the signal during sudden large signal changes.

To Play Media Player feedback:
* first enable (check) the signal you wish to set up
* click on the signal name to highlight it
* make your threshold choice in the drop down box. 
* click the Media Player button
* close the window.
The Windows Media Player on the Secondary Screen Window must now be activated.

To Play Audio feedback:
* first enable (check) the signal you wish to set up
* click on the signal name to highlight it
* make your threshold choice in the drop down box. 
* click the drop-down SOUNDS window.
* close the window.
TheAudio plays when the Speaker buton in enabled AND the ABOVE or BELOW Threshold contition is met. CONTINUOUS means it is never paused; thresholds are not respected.