Heinrich Isaac
- Karadar Classical Music Dictionary article with brief life and facsimile of a Credo.
- http://www.karadar.it/Dictionary/isaac.html

Kunst der Fuge | Heinrich Isaac
- Missa Carminum offered in MIDI files.
- http://www.kunstderfuge.com/midi-i.htm#isaac

Mass Settings of Heinrich Isaac
- Biography and overview of his liturgical works including various combinations of unison and polyphony.
- http://web.bsu.edu/jcarter2/Isaac.htm

Heinrich Isaac (1450-c1517)
- Listing of vocal works including some lyrics from the Lied and Art Song Texts Page at REC Music.
- http://www.recmusic.org/lieder/i/isaac.html

Isaac, Heinrich
- Biography following his progression from Flanders to Italy, the development of his music, and a summary list of works. From the Grove Concise Dictionary of Music entry at WQXR radio.
- http://www.wqxr.com/cgi-bin/iowa/cla/learning/grove.html?record=4547

Classical Music Archives: Isaac
- Music files offered in MIDI format.
- http://www.classicalarchives.com/early-i.html#ISAAC

Isaac, Heinrich (c. 1450 - 1517), Netherlands
- Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays.
- http://stevenestrella.com/composers/composerfiles/isaac1517.html