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# Peer Review

## Geometric Interval Constructor

by Jose Rodriguez Alvira

## Ratings

### Overall Numeric Rating:

Content Quality:
Effectiveness:
Ease of Use:
 Reviewed: Feb 04, 2014 by Music Overview: Geometric Interval Constructor is an interactive simulation in which musical intervals are created inside a circle using lines or geometric shapes. It provides a visual way to look at interval distances and relationships. This application is part of a larger collection of applications at Teoria.com, each designed to demonstrate fundamental music theory concepts. Type of Material: Music theory simulation application. Recommended Uses: This application could be used to reinforce the concepts behind the construction of intervals. Assignments could be created to test a students knowledge of interval relationships between like intervals. Technical Requirements: User needs a modern browser with HTML 5 and Javascript support and can also be run on iPad or iPhone. Identify Major Learning Goals: To learn the distances of each class of interval and the relationships of like intervals. Based on users selection of interval type and root note, they are presented with a visual display. Used in one of two modes (simple interval or circular), simple Interval joins with a line the two notes that form the selected interval. In Circular mode a geometric figure is created using the selected interval. The figure shows the notes needed to do a complete cycle and return to the first note using the interval. For example, if you choose major third the notes will be C - E - G#/Ab - C Target Student Population: High School, College General Ed, Professional Prerequisite Knowledge or Skills: A basic understanding of intervals is needed to understand the content of this site.

### Content Quality

Rating:
 Strengths: This application is very clearly designed to offer a visual demonstration of the distances between intervals and show their relationship to each other. The content is accurate and covers all possible interval combinations. Concerns: When using circular mode, it is sometimes unclear how a user should spell the interval…as in the case of enharmonic equivalents. Yes…an interval is an interval, but what is the correct spelling? Ex: Perfect fourth shows root note of C connecting to both F and G. The ‘direction’ is clockwise, but the root is still clearly defined visually, so it can be confusing.

### Potential Effectiveness as a Teaching Tool

Rating:
 Strengths: The strength of this application regarding potential effectiveness is in the straight forward visual demonstration of interval distances. Concerns: The effectiveness of this application depends on the assignments and exercises a teacher would create to reinforce interval concepts presented in the classroom. This application is also potentially confusing in terms of properly spelling the intervals in circular mode.

### Ease of Use for Both Students and Faculty

Rating:
 Strengths: This application is easy to use. The interface is intuitive and easy to figure out how to use without instruction. This application also works well on an iPad. Concerns: Smaller screen sizes than tablet may be a little more difficult to see/navigate

Other Issues and Comments: No other issues.

 Creative Commons:
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