Keywords: Cowell tone clusters.png Two examples of tone-cluster notation as first used by Henry Cowell Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Sreejithk2000 using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2007-07-10 Original uploader was Jlhughes at http //en wikipedia org en wikipedia Later version s were uploaded by Tjako at http //en wikipedia org en wikipedia Released into the public domain by the author File Cowell tone clusters mid en wikipedia Jlhughes original upload log page en wikipedia Cowell_tone_clusters png 2008-04-06 18 28 Tjako 562×379× 17375 bytes <nowiki> pd picture of clusters http //upload wikimedia org/wikipedia/en/b/bc/Cowell_tone_clusters png 04-04-2008 pd </nowiki> 2007-07-10 08 26 Jlhughes 562×379× 17375 bytes <nowiki>Two examples of tone-cluster notation as first used by Henry Cowell</nowiki> Tone clusters Henry Cowell |