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Line 71: − + + + − 21. Note entry - select a note for tuning+ − 22. Frequency entry - enter a frequency to mark+ − 23. Show/hide tuning mark+ − 24. Show/hide harmonics+ − 25. Play a note+ − 26. Measured note+ Line 98:
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[[image:Measure-screen.JPG|600px|center]]
[[image:Measure-screen.JPG|600px|center]]
1. Select secondary toolbar - allows the Activity's Journal entry to be renamed
;1. Select secondary toolbar: Allows the Activity's Journal entry to be renamed
2. Select secondary toolbar - measurement settings
;2. Select secondary toolbar: Measurement settings
3. Select secondary toolbar - tuning settings
;3. Select secondary toolbar: Tuning settings
4. Time base/frequency - graphs the signal vs. time or graphs amplitude vs. frequency
;4. Time base/frequency: Plots the signal vs. time or plots amplitude vs. frequency
5. The time scale
;5. The time scale: Used to scale the plot
6. Freeze the display
;6. Freeze the display: Pause the program
7. Capture sample now - saves an image of the wave in the Journal
;7. Capture sample now: Saves an image of the wave in the Sugar Journal
8. Stop - exits the Activity
;8. Stop: Exits the Activity
9. Mute - mute/unmute channel
;9. Mute: Mute/unmute channel
10. Invert - invert the display
;10. Invert: invert the display
11. Use these sliders to control the sensitivity
;11. Amplitude adjustment: Use these sliders to control the sensitivity
12. The settings that are selected
;12. Caption: A summary of current settings that are selected
===Sensor toolbar===
===Sensor toolbar===
The sensor toolbar - measurement settings
The sensor toolbar - measurement settings
13. Sound - use this setting with the internal microphone, external microphone and external AC signals
;13. Sound: Use this setting with the internal microphone, external microphone and external AC signals
14. Resistance sensor - use with external resistive type transducers
;14. Resistance sensor: Use with external resistive type transducers
15. Voltage sensor - use with external sensors which generate a voltage
;15. Voltage sensor: Use with external sensors which generate a voltage
16. Sample interval - a text file 'Measure Log' is saved to the journal, it contains one sample per interval
;16. Sample interval: A log file 'Measure Log' is saved to the journal, it contains one sample per interval
17. Starts/stops saving a text file 'Measure Log' with measured values as readable text
;17. Starts/stops saving a log file: 'Measure Log' with measured values as readable text
18. Trigger - synchronise the sample period to the waveform so that the sample will start on a rising edge or falling edge
;18. Trigger: Synchronise the sample period to the waveform so that the sample will start on a rising edge or falling edge
''There is no 19.''
''There is no 19.''
'''Note:''' Whenever you switch sensing modes, Measure switches to time-base plotting.
===Tuning toolbar===
===Tuning toolbar===
'''Hint:''' Adjust the time scale (#5) to increase the spacing between the tuning lines.
'''Hint:''' Adjust the time scale (#5) to increase the spacing between the tuning lines.
20. Instrument - select instrument to tune
;20. Instrument: Select instrument to tune.
;21. Note entry: Select a note for tuning. (When an Instrument is selected, the notes are restricted to the open notes of that instrument; when no instrument is selected, any of the 88 notes on a piano can be selected.)
;22. Frequency entry: The frequency of the target note is displayed. (The user can also enter a frequency to target.)
;23. Show/hide tuning mark: A tuning mark displays the target note on the plot.
;24. Show/hide harmonics: Harmonic lines are integer multiples of the target frequency.
;25. Play a note: Plays a five-second sample of the target note. (Sampling is disabled while the note is playing.)
;26. Measured note: An estimate of the note being played is displayed. If the note is slightly flat or sharp, relative to the target, it is displayed in color (red == very flat or sharp; yellow == somewhat flat or sharp).
'''Note:''' Whenever you switch to a tuning mode, Measure switches to frequency-base plotting.
====Measuring A5 (880 HZ)====
====Measuring A5 (880 HZ)====
* sounds contain multiple frequency components or harmonics
* sounds contain multiple frequency components or harmonics
* the more pure sounds have less harmonics
* the more pure sounds have less harmonics
Sameer has a [http://www.youtube.com/watch?v=6nqDsYf_I7M&feature=youtu.be video] of using Measure to analyze dual-tone singing from Tuva.
==Sharing==
==Sharing==
This Activity does not currently support sharing.
This Activity does not currently support sharing. However, it is useful to use one XO for measuring and another for generating sounds.
==Extending==
==Extending==
===More ideas===
===More ideas===
You can find ideas for fun science experiments at http://wiki.sugarlabs.org/go/Activities/TurtleArt/Using_Turtle_Art_Sensors and http://wiki.laptop.org/go/Measure
You can find ideas for fun science experiments at [[Activities/TurtleArt/Using_Turtle_Art_Sensors]] and http://wiki.laptop.org/go/Measure
===Building sensors===
===Building sensors===
There are detailed instructions for building sensors at [http://wiki.laptop.org/go/Measure#How_to_build_low_cost_sensors].
There are detailed instructions for building sensors at http://wiki.laptop.org/go/Measure#How_to_build_low_cost_sensors
===Adding instruments===
===Adding instruments===
You can add new instruments to tune by modifying the instrument dictionary in config.py.
You can add new instruments to tune by modifying the instrument dictionary in config.py.
INSTRUMENT_DICT = {
_('Guitar'): [82.4069, 110, 146.832, 195.998, 246.942, 329.628],
_('Violin'): [195.998, 293.665, 440, 659.255],
_('Viola'): [130.813, 195.998, 293.665, 440],
_('Cello'): [65.4064, 97.9989, 146.832, 220],
_('Bass'): [41.2034, 55, 73.4162, 97.9989],
_('Charango'): [329.63, 392, 440, 523.25, 659.26],
_('Ukulele'): [261.626, 329.628, 391.995, 440],
_('Sitar'): [174.614, 130.813, 195.998, 65.4064, 391.995, 261.626, 523.251],
_('Mandolin'): [195.998, 293.665, 440, 659.255],
_('Recorder'): [391.995]
}
== Reporting problems ==
== Reporting problems ==
Make comments/suggestions on the [[Talk:Activities/Measure]] page.
Make comments/suggestions on the [[Talk:Activities/Measure]] page.
Please file bugs at [https://bugs.sugarlabs.org/newticket?component=Meausre].
Please file bugs at [https://bugs.sugarlabs.org/newticket?component=Measure].
To list all open tickets of Measure, see [https://bugs.sugarlabs.org/query?status=accepted&status=assigned&status=new&status=reopened&component=Measure].
To list all open tickets of Measure, see [https://bugs.sugarlabs.org/query?status=accepted&status=assigned&status=new&status=reopened&component=Measure].
[[Category: Activity]]
[[Category:Activities]]