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| [[image:Measure-screen.JPG|600px|center]] | | [[image:Measure-screen.JPG|600px|center]] |
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− | 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 |
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− | 2. Select secondary toolbar - measurement settings | + | ;2. Select secondary toolbar: Measurement settings |
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− | 3. Select secondary toolbar - tuning settings | + | ;3. Select secondary toolbar: Tuning settings |
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− | 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 |
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− | 5. The time scale | + | ;5. The time scale: Used to scale the plot |
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− | 6. Freeze the display | + | ;6. Freeze the display: Pause the program |
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− | 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 |
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− | 8. Stop - exits the Activity | + | ;8. Stop: Exits the Activity |
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− | 9. Mute - mute/unmute channel | + | ;9. Mute: Mute/unmute channel |
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− | 10. Invert - invert the display | + | ;10. Invert: invert the display |
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− | 11. Use these sliders to control the sensitivity | + | ;11. Amplitude adjustment: Use these sliders to control the sensitivity |
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− | 12. The settings that are selected | + | ;12. Caption: A summary of current settings that are selected |
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| ===Sensor toolbar=== | | ===Sensor toolbar=== |
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| The sensor toolbar - measurement settings | | The sensor toolbar - measurement settings |
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− | 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 |
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− | 14. Resistance sensor - use with external resistive type transducers | + | ;14. Resistance sensor: Use with external resistive type transducers |
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− | 15. Voltage sensor - use with external sensors which generate a voltage | + | ;15. Voltage sensor: Use with external sensors which generate a voltage |
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− | 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 |
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− | 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 |
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− | 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 |
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| ''There is no 19.'' | | ''There is no 19.'' |
| + | |
| + | '''Note:''' Whenever you switch sensing modes, Measure switches to time-base plotting. |
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| ===Tuning toolbar=== | | ===Tuning toolbar=== |
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| '''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. |
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− | 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.) |
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− | 21. Note entry - select a note for tuning
| + | ;22. Frequency entry: The frequency of the target note is displayed. (The user can also enter a frequency to target.) |
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− | 22. Frequency entry - enter a frequency to mark
| + | ;23. Show/hide tuning mark: A tuning mark displays the target note on the plot. |
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− | 23. Show/hide tuning mark
| + | ;24. Show/hide harmonics: Harmonic lines are integer multiples of the target frequency. |
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− | 24. Show/hide harmonics
| + | ;25. Play a note: Plays a five-second sample of the target note. (Sampling is disabled while the note is playing.) |
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− | 25. Play a note
| + | ;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). |
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− | 26. Measured note
| + | '''Note:''' Whenever you switch to a tuning mode, Measure switches to frequency-base plotting. |
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| ====Measuring A5 (880 HZ)==== | | ====Measuring A5 (880 HZ)==== |
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| * 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. |
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| ==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. |
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| ==Extending== | | ==Extending== |
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| ===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] |
| + | } |
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| == Reporting problems == | | == Reporting problems == |
| Make comments/suggestions on the [[Talk:Activities/Measure]] page. | | Make comments/suggestions on the [[Talk:Activities/Measure]] page. |
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− | Please file bugs at [https://bugs.sugarlabs.org/newticket?component=Meausre]. | + | Please file bugs at [https://bugs.sugarlabs.org/newticket?component=Measure]. |
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| 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]. |
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− | [[Category: Activity]] | + | [[Category:Activities]] |