F16: Piano Glove - Revision history

146 user8: /* Visualization Development */

2016-12-24T07:00:49Z

‎Visualization Development

146 user8: /* Full System Integration */

2016-12-24T07:00:38Z

‎Full System Integration

146 user8: /* Problems Encountered #1 */

2016-12-24T07:00:18Z

‎Problems Encountered #1

146 user8: /* Algorithm Diagram */

2016-12-24T07:00:06Z

‎Algorithm Diagram

146 user8: /* Note Mode Selection Diagram */

2016-12-24T06:58:34Z

‎Note Mode Selection Diagram

146 user8: /* Hardware */

2016-12-24T06:57:39Z

‎Hardware

146 user8: /* Visualization Development */

2016-12-24T06:56:16Z

‎Visualization Development

146 user8: /* Visualization Development */

2016-12-24T06:55:49Z

‎Visualization Development

146 user8: /* Visualization Development */

2016-12-24T06:55:31Z

‎Visualization Development

146 user8: /* DSP Simulations */

2016-12-24T06:26:51Z

‎DSP Simulations

@@ Line 585: / Line 585: @@
 === Visualization Development ===
-[[File:CmpE146 F16 T2 ParticleSystem.PNG | 1000px | center | <center> '''Figure 20. Piano Visualization '''</center>]]
+[[File:CmpE146 F16 T2 ParticleSystem.PNG | 1000px | center | <center> '''Figure 16. Piano Visualization '''</center>]]
 === Software Used ===

@@ Line 542: / Line 542: @@
-[[File:CmpE146 F16 T2 Glove.PNG |thumb | left | <center> '''Figure 17. Interfacing Flex Sensors with the Gloves '''</center>]]
+[[File:CmpE146 F16 T2 Glove.PNG |thumb | left | <center> '''Figure 13. Interfacing Flex Sensors with the Gloves '''</center>]]
@@ Line 550: / Line 550: @@
 * ''' Soldering: ''' Lastly, we soldered wires to flex sensors so that it would be easier to interface with our other components. Due to the small gauge wire we used for the small ends of the sensors, the connections seemed to constantly break off. To fix this issue, shrink wrap was applied to keep the connections strong.
-[[File:CmpE146 F16 T2 Speaker.PNG |thumb | right | <center> '''Figure 18. Audio Integration '''</center>]]
+[[File:CmpE146 F16 T2 Speaker.PNG |thumb | right | <center> '''Figure 14. Audio Integration '''</center>]]
@@ Line 558: / Line 558: @@
-[[File:CmpE146 F16 T2 FullSystemPNG.PNG |thumb | left | <center> '''Figure 19. Full System Integration '''</center>]]
+[[File:CmpE146 F16 T2 FullSystemPNG.PNG |thumb | left | <center> '''Figure 15. Full System Integration '''</center>]]
 ===== Problems Encountered #3 =====

@@ Line 534: / Line 534: @@
 * Initially, we had to figure out how a speaker worked and how to simulate a specific note on a speaker. As mentioned in the previous section, a speaker works by vibrating a membrane according to an analog voltage value. We figured that we needed to oscillate the speaker membrane at a specific frequency per note (as shown below). At that point, we needed to figure out which notes corresponded to which frequencies. After this, we had to figure out how to make the membrane move in a fashion is similar to a note's specific oscillation frequency. Realizing that this could be simulated by a sine wave, we wrote a similar function into the DAC to simulate each note. Several [http://www.phy.mtu.edu/~suits/notefreqs.html| notes and frequencies] are listed below.
-[[File:CmpE146 F16 T2 NoteFreq.PNG |thumb |center | <center> '''Figure 16. Sample of notes and frequencies in Hz. '''</center>]]
+[[File:CmpE146 F16 T2 NoteFreq.PNG |thumb |center | <center> '''Figure 12. Sample of notes and frequencies in Hz. '''</center>]]
 ===== Problems Encountered #2 =====

@@ Line 496: / Line 496: @@
 We also decided to use a Karplus strong algorithm, which simulates the fading of a note after is is played. Notes don't go on forever in real pianos, they fade. The algorithm decreases the amplitude by using a circular buffer, containing the wave, and averaging each element to a central value. Eventually, all the elements of the circular buffer would reach that central value and thus the amplitude (or difference between the highest and lowest value) would decrease. Therefore, to make the sound more real we used this algorithm.
 ===== Algorithm Diagram =====
-[[File:CmpE146 F16 T2 KarplusStrong.PNG |thumb |center |upright=3 |<center> '''Figure 12. Diagram of Karplus Strong Algorithm'''</center>]]
+[[File:CmpE146 F16 T2 KarplusStrong.PNG |thumb |center |upright=3 |<center> '''Figure 11. Diagram of Karplus Strong Algorithm'''</center>]]
 === Communication Protocols & Device Drivers===

← Older revision		Revision as of 06:58, 24 December 2016
Line 492:		Line 492:
	[[File:SoundAlg.png \|thumb \|center \|upright=2 \|<center> '''Figure 10. Flowchart of Sound Generation Algorithm'''</center>]]		[[File:SoundAlg.png \|thumb \|center \|upright=2 \|<center> '''Figure 10. Flowchart of Sound Generation Algorithm'''</center>]]

−
−	~~===== Note Mode Selection Diagram =====~~
−	* Below is a diagram of the process of how a '''Note Mode''' is selected. The program determines to see which GPIOs are triggered, and based on that you can enter four different states: SUPERMARIO_LITE, SUPERMARIO_FULL, TWINKLE, and BEETHOVAN. Each different state has a different selection of notes that the user can play with. This was implemented for flexibility, as sometimes people do not always like to play the same thing.
−
−	~~[[File:NoteMode.png \|frame \|center \|<center> '''Figure 11. Diagram of Note Mode Selection'''</center>]]~~

	==== Karplus Strong ====		==== Karplus Strong ====

@@ Line 523: / Line 523: @@
 === Hardware ===
-===== Validation w/Breadboard Prototype =====
+===== Problems Encountered #1 =====
-[[File:Breadboardtest.PNG | left | thumb | <center> '''Figure 13. Initial Prototype''' </center> ]]
+For more information on IC Packaging and Dimensions, please refer to this link: [https://en.wikipedia.org/wiki/List_of_integrated_circuit_package_dimensions IC Package Dimensions]
 * '''Design Comment:''' Initially we were second guessing whether or not we needed a Schmitt and Trigger circuit for the purpose of this project. However, during testing we saw that it was easy to accidentally bend other fingers, or not hold a finger down for a certain duration of time. By implementing the Schmitt and Trigger Circuit, we were able to keep the signal high or low depending on if it was within the certain threshold (our threshold was between 1.1v and 2.2v). This enabled us to stop randomly firing other keys, and hold the ones we did want to play for the appropriate amount of time.
 === Software ===

@@ Line 609: / Line 609: @@
 === Visualization Development ===
-[[File:CmpE146 F16 T2 ParticleSystem.PNG | frame | center | <center> '''Figure 20. Piano Visualization '''</center>]]
+[[File:CmpE146 F16 T2 ParticleSystem.PNG | 800px | center | <center> '''Figure 20. Piano Visualization '''</center>]]
 === Software Used ===

@@ Line 553: / Line 553: @@
 ==== DSP Simulations ====
-In order to test the playing of notes through the DAC, we had to connect a speaker (or earphones). Therefore, we created a simple low-pass filter circuit that connected to a pair of Apple earphones. The image below shows how we connected it. The pin of a standard Apple headphone has mic, ground, right, and left. In the figure below, we have the green wire connecting to ground and the red wire connecting to right and left. The electrical tape is present to prevent shorts.
+In order to test the playing of notes through the DAC, we had to connect a speaker (or earphones) to the circuit so that we could hear the different sound frequencies that we were producing.
- [[File:PianoGloveInitialPrototype.jpg |thumb |center |upright=2 | <center> '''Figure 15: Circuit initially used to test sound generation.'''</center>]]
 ===== Problems Encountered #1 =====
 * Initially, we had to figure out how a speaker worked and how to simulate a specific note on a speaker. As mentioned in the previous section, a speaker works by vibrating a membrane according to an analog voltage value. We figured that we needed to oscillate the speaker membrane at a specific frequency per note (as shown below). At that point, we needed to figure out which notes corresponded to which frequencies. After this, we had to figure out how to make the membrane move in a fashion is similar to a note's specific oscillation frequency. Realizing that this could be simulated by a sine wave, we wrote a similar function into the DAC to simulate each note. Several [http://www.phy.mtu.edu/~suits/notefreqs.html| notes and frequencies] are listed below.