Mr Mulligan said he was "surprised" at the strength of the responses which came from large and small record labels, rights bodies, digital stores and technology providers.
The study revealed that about 54% of those executives questioned thought that current DRM systems were too restrictive.
Also, 62% believed that dropping DRM and releasing music files that can be enjoyed on any MP3 player would boost the take-up of digital music generally. However, Mr Mulligan pointed out that this percentage changed depending on which sector of the industry was answering.
Among all record labels 48% of all executives thought ending DRM would boost download sales - though this was 58% at the larger labels. Outside the record labels 73% of those questioned thought dropping DRM would be a boost for the whole market.