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ECE 477 Digital Systems Senior Design Project Spring 2009

Homework 13: User ManualDue: Friday, April 24, at NOON

Team Code Name: das Autotünr Group No. 4

User Manual Outline: Brief (marketing-style) product description Product illustration annotated with callouts for each control/display Product setup instructions Product use instructions Product troubleshooting instructions

Evaluation:

SCORE DESCRIPTION

10 Excellent – among the best papers submitted for this assignment. Very few corrections needed for version submitted in Final Report.

9 Very good – all requirements aptly met. Minor additions/corrections needed for version submitted in Final Report.

8 Good – all requirements considered and addressed. Several noteworthy additions/corrections needed for version submitted in Final Report.

7 Average – all requirements basically met, but some revisions in content should be made for the version submitted in the Final Report.

6 Marginal – all requirements met at a nominal level. Significant revisions in content should be made for the version submitted in the Final Report.

* Below the passing threshold – major revisions required to meet report requirements at a nominal level. Revise and resubmit.

* Resubmissions are due within one week of the date of return, and will be awarded a score of “6” provided all report requirements have been met at a nominal level.


Willkommen to the das Autotünr experience! A feat of German-inspired engineering, das Autotünr was designed to bring a bit of ease to carpel tunnel-ridden musicians worldwide. No longer will you waste valuable time fiddling with pegs to tune your guitar! Custom guitar tunings is a cinch through the easy-to-navigate digital user interface. The utility does not end here! das Autotünr is also capable of recording and storing any songs you play on guitar as a MIDI file. This can then be imported into a music editing program of your choice for maximum creative output. das Autotünr is the best German-inspired thing to enter rock and roll since David Hasselhoff!


Product Overviewdas Autotünr is an automatic guitar tuner and MIDI transcription unit combined into one portable device. It has two modes of operation – tuning mode and transcription mode.

In tuning mode, it will automatically tune the guitar to a variety of predefined settings, as well as user-defined settings, using the attachable motor assembly. The motor assembly is highly configurable to be used with different types of guitar headstocks.

In transcription mode, a USB mass storage device can be inserted into the user console upon which sound data from the guitar will be recorded and stored as a MIDI file. Approximately eight minutes of sound data will be recorded on each MIDI file; however, multiple MIDI files may be created within a recording session, if needed.


Caution

Due to possible over-torsion from the motors, one must be wary of snapping guitar strings. Do not play the guitar while the motors are turning in tuning mode. Do not place your face in front of the strings while tuning. Eye protection is well-advised.

Do not place any objects other than guitar pegs in the motor assembly headers while in tuning mode. Bruised and broken appendages may result. Infants and small animals should be kept away from the motor assembly and cable at all times.

Disclaimer

The Four Horsemen of the Apocalypse do not guarantee correct grammatical usage of the word “das” in the following manual. Excessive and inappropriate use of the umlaut will also be present in the following document and should


be disregarded in the event it may alter the meaning of the original word.


das Üser Interface

1 LCD Display2 LED Indicators1 Power Input1 microphone input

1 stereo phono jack input4 menu navigation push buttons1 USB input1 motor cable output (not pictured)


das Motor Assembly

(3 pegs per side orientation shown)

6 servo motors with peg holders10 wing nuts1 control board with 4 connectors

1 long side assembly (2 pieces)1 short side assembly (2 pieces)


das Motor Assembly Setup

3 pegs on each side (“normal” acoustic guitar setup)

Long Side Assembly1. Loosen the 10 wing nuts on the long pieces.2. Slide motors 1, 2, and 3 in ascending order in

between the two long pieces. Make sure that all of the motor numbers face toward the open end of the assembly.

3. Lightly tighten all 10 wing nuts, but leave enough room that the motors can slide with gentle pressure.

4. Connect the motor wires to the appropriate header. Make sure plug is oriented correctly and attached to the correct header. (Note markings.)

Short Side Assembly1. Loosen the 6 wing nuts on the short pieces.2. Slide motors 4, 5, and 6 in descending order in

between the two short pieces. Make sure that all of


the motor numbers face toward the open end of the assembly.



Final Assembly1. Loosen the 4 wing nuts on the bottom of the motor

assembly just enough that the assembly can expand easily.

2. Lay your guitar’s headstock between the 6 motors with the extra length of plastic under the guitar’s neck.

3. Slide the motors on one side so they line up with the pegs on the guitar and then tighten all of the wing nuts on that side. (Note that you may have to adjust the peg holders so that the pegs will slide into them.)

4. Repeat this process for the second side.5. Slide both sides together pinching the guitar

between the peg holders and tighten the 4 wing nuts underneath of the motor assembly.


6 pegs on one side (“normal” electric guitar setup)

Long Side Assembly1. Loosen the 10 wing nuts on the long pieces.2. Slide motors 1, 2, 3, 4, 5, and 6 in ascending order in

between the two long pieces. Make sure that all of the motor numbers face toward the open end of the assembly.



Final Assembly1. Loosen the 4 wing nuts on the bottom of the motor

assembly.2. Lay your guitar’s headstock between the 6 motors

and the short side with the extra length of plastic under the guitar’s neck.

3. Slide the motors so they line up with the pegs on the guitar and then tighten all of the wing nuts. You may have to adjust the peg holders to fit the guitar pegs.


4. Slide both sides together pinching the guitar between the peg holders, and tighten the 4 wing nuts underneath of the motor assembly.

AutoTüning Your Guitar

1. Connect your guitar to das Autotünr using the motor assembly setup. Power up the main box, and press any button to bring up the main menu screen. Scroll and select the Autotün option.

2. Select a tuning setting. Selecting the default tuning setting will bring you straight to the tuning screen. Selecting a user tuning setting will allow you to use or edit the setting (see Insert das Custom Tuning).

3. The tuning screen will show the current frequency of the indicated string and its goal frequency at the bottom. The numbers 1 through 6 represent the 6 strings on the guitar, and the string being tuned will have an arrow underneath of it to show which way the string needs tuned.

4. Strum the indicated string until the arrow moves to the next string.

5. After successful tuning of the last string or upon reaching an error condition, an informative screen will be displayed.


Insert das Custom Tuning

1. das Autotünr allows you to save up to 5 personal tuning settings. To adjust these settings power up the main box and press any button to enter the main menu.

2. Select the tune option to enter the settings screen. 3. Scroll to and select one of the 5 user settings. This

will bring up a screen with the option to tune with the setting as it is currently or to edit the option.

4. Choose the option to edit your user setting.5. The edit screen will appear with 6 notes listed to the

right and 3 options listed on the left. Scroll up/down to select an option on the left (right button selects).

6. The default option will set all notes for the user setting to be the default note. The save option will save the user setting (note: the setting is not saved until this option is selected). The edit option will move the cursor under the first note listed to the right.

7. Use the up/down buttons to change the note setting for that string.

8. The right button will move you to the next string and back to the three options on the left after setting the


sixth string’s note. At any point in this process, the left button will cancel changes.

Transcribing & Saving MIDI Files to ÜSB Flash Drives

1. In order to transcribe a MIDI file of music you play, start by powering up the main box and pressing any button to enter the main menu.

2. Select the transcribe option.3. If an acceptable USB mass storage device is present

you will be ready to record. If not, a message will display telling you to do so (press the left button to exit to the main menu from this message).

4. Once an acceptable device is inserted you are ready to record.

5. Simply press the right button to start recording and begin playing your guitar.


6. When you are finished playing, press the right button again, and das Autotünr will write your MIDI file on the storage device inserted.

7. Press the left button at any point to cancel.


das Troübleshooting

Problem Possible Cause SolutionUSB Flash Drive is not recognized.

1. Bad connection.

2. Wrong file system on the flash drive.

1. Remove the flash drive and plug it back in tightly.

2. Make sure that the drive is FAT32 format, 512KB sector size.

Motors do not turn in tuning mode.

1. Bad header connection.

2. Software error.

1. Ensure the headers are connected in the user console and on the motor assembly.

2. Press the “Reset” button inside the user console.

MIDI file is blank or missing notes.

1. Software error.

2. Data acquisition error.


2. Make sure microphone is connected and sound hole close for acoustic guitars. Make sure jack is connected and plugged in for electric guitars.

User interface is unresponsible.

1. Software error.

2. Bad connection.


2. Make sure the pushbutton connector is connector.

design project - purdue engineering€¦ · web view3 pegs on each side (“normal” acoustic...

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