7 Best Voice-Related Online Resources for Singers & Voice Teachers

In 2025, singers and voice teachers have access to countless online tools and resources to enhance their practice and teaching. In this article, we will take a brief overview of seven outstanding free resources that can enhance your learning and save time on your vocal journey. All links are provided below in the reference section. 

1. Pink Trombone: Interactive Vocal Tract Visualization

Pink Trombone is an accessible tool for understanding vocal mechanics that I’ve been using for years. This interactive platform provides a fully adjustable vocal tract model that demonstrates in real time how modifications in tract-shape influence vowel formation and tonal quality. What makes this resource particularly valuable is its ability to independently control phonation types, from breathy to pressed, while simultaneously adjusting pitch. This immediate audio feedback creates a powerful learning loop for both students and teachers, making abstract concepts tangible and accessible.

2. MADDE Voice Synthesizer

Created by Svante Grandquist (whom I had the honor of meeting in Sweden), the Madde Voice Synthesizer is a fairly user-friendly vocal tract model that offers many more features than a tool like Pink Trombone. This sophisticated tool allows users to experiment with the interplay between pitch, vibrato, and formant resonance through detailed visual representations. Its spectral tilt function enables fine-tuned adjustments of phonation types (Breathy, Flow, Pressed etc), providing deeper insights into voice production. What I love about it is that you can see the keys of a piano which makes understanding the relationship between frequency (pitch) and formants (resonances of the vocal tract) come to life. While MADDE is primarily designed for Windows, Mac users can access this valuable resource by installing XQuartz, Wine Stable, and MADDE itself. To route audio between applications, Soundflower is also required.

3. Clip Notes: Smart Recording Assistant

This simple mobile app saves tons of time when revisiting recordings of voice lessons and rehearsals. Clip Notes allows users to create titled bookmarks either during recording or post-recording, eliminating the time-consuming process of searching through lengthy audio files. This feature proves invaluable for both teachers and students who want to quickly reference specific exercises, songs, or technical discussions from their sessions. The ability to export recordings ensures easy sharing and accessibility across devices. I’ve been using this app for 7+ years and I regularly recommend it! 

4. Transpose Extension for Chrome

This versatile Chrome extension, Transpose, serves as an essential tool for vocal practice and teaching. It enables precise pitch adjustments by steps, half-steps, or even specific Hz frequencies, along with speed control capabilities. Due to the fact that the extension is on the browser window, any website that you visit (e.g. YouTube and SoundCloud) you can manipulate the audio with. It makes it particularly useful for working with online accompaniment tracks. While audio quality may decrease with more extreme adjustments, it remains an excellent resource for rehearsal purposes and key exploration. I frequently use this app in lessons when helping students decide on the ideal key of a song for their voice. 

5. Musical Theatre Songs Database

For those specializing in musical theatre, this database, the Musical Theatre Song Database,  proves invaluable in repertoire selection. Even with its free version, users can search for songs based on criteria including age range, voice type, tempo, and dramatic style. The platform's monthly featured composers ensure fresh content accessibility, making it an excellent starting point for discovering appropriate performance material for various skill levels and voice types. For access to a much wider range of song suggestions, you need to purchase the subscription. However, as the featured composers change monthly, you will get fresh new suggestions fairly frequently. 

6. Voice Science Works

Co-founded by Laurel Irene and David Harris, the thorough platform Voice Science Works serves as a virtual library for voice science education, offering extensive resources on vocal anatomy, physiology, and acoustics. The content bridges the gap between scientific research and practical application, making complex concepts accessible to voice professionals and enthusiasts alike. The site's commitment to scientific accuracy while maintaining user-friendly presentation makes it an essential resource for anyone serious about understanding the voice at a deeper level. I have used this wonderful site as a point of reference when preparing lectures or working with singers and voice teachers wanting to understand voice at a deeper level. 

7. The Vocal Pedagogy Project

As an ever growing archive of vocal expertise, The Vocal Pedagogy Project provides unique insights into the lives of voice professionals, both historical and contemporary. Through its collection of interviews with leading experts in the field, including voice teachers, coaches, ENTs, speech pathologists, and researchers, it offers valuable perspectives on technical aspects of voice production as well as how these folks got started in the field of voice and what they love most about their work. This resource particularly shines in its ability to connect current practitioners with the rich history and evolving future of vocal pedagogy. One of my favorite features of the site are the linked profiles. So when one pedagogue mentions another by name (i.e. a colleague, mentor, student etc) their name is linked and takes you to that practitioner's page. The number of linked pedagogues will obviously continue to increase as the site features more and more interviews with living pedagogues and articles on historic figures.  *Full disclaimer, I am a contributor to this website, so I may be a little biased. 

Bonus Resource: New York Vocal Coaching (NYVC)

NYVC offers an impressive array of free educational content through multiple channels. Our flagship YouTube series Voice Lessons to the World provides comprehensive vocal instruction, while additional series like Singing Dictionary, Voice Breakdown, and Quick Singing Tips,  Voice Lessons Online offer focused learning opportunities. The Daily Vocal Tips website features bite sized tips for you to consider and apply. All of these resources are completely free and accessible to everyone, creating a rich ecosystem of educational resources for singers at all levels.

Conclusion

These resources represent some of the finest free tools available to the voice community. Whether you're a student, teacher, or vocal enthusiast, each platform offers unique benefits for developing understanding, skill, and artistry in vocal practice. By incorporating these resources into your practice routine or teaching methodology, you can enhance your vocal journey with time saving technology, evidence-based tools and expert insights. 

References

1. Pink Trombone:https://dood.al/pinktrombone/
2. Madde Voice Synthesizer:https://www.tolvan.com/index.php?page=/madde/madde.php
3. Clip Notes: Available in the App Store https://apps.apple.com/au/app/clipnotes-audio-bookmarks/id1359264561
4. Transpose Extension for Chrome:https://transpose.video/
5. Musical Theatre Songs:https://musicaltheatersongs.com/
6. Voice Science Works:http://www.voicescienceworks.org/
7. The Vocal Pedagogy Project: [Website URL not provided in source]
8. Daily Vocal Tips (NYVC): https://dailyvocaltips.com/   
9. NYVC Youtube Page: https://www.youtube.com/@NewYo...

Note: Additional NYVC resources can be found on their YouTube channel under series including "Voice Lessons to the World," "Singing Dictionary," "Voice Breakdown," "Quick Singing Tips," and "Voice Lessons Online."