Over the past four decades, the number, diversity and complexity of digital musical instruments (DMIs) has increased rapidly. There are very few constraints on DMI design as such systems can be easily reconfigured, offering near limitless flexibility for music-making.Given that new acoustic musical instruments have in many cases been created in response to the limitations of available technologies, what motivates the development of new DMIs? We conducted an interview study with ten designers of new DMIs, in order to explore 1) the motivations electronic musicians may have for wanting to build their own instruments; and 2) the extent to which these motivations relate to the context in which the artist works and performs (academic vs. club settings). We found that four categories of motivation were mentioned most often: M1: wanting to bring greater embodiment to the activity of performing and producing electronic music; M2: wanting to improve audience experiences of DMI performances; M3: wanting to develop new sounds, and M4: wanting to build responsive systems for improvisation. There were also some detectable trends in motivation according to the context in which the artists work and perform. Our results offer the first systematically gathered insights into the motivations for new DMI design. It appears that the challenges of controlling digital sound synthesis drive the development of new DMIs, rather than the shortcomings of any one particular design or existing technology.
In contrast to their traditional, acoustic counterparts, digital musical instruments (DMIs) rarely feature a clear, causal relationship between the performer's actions and the sounds produced. They often function simply as systems for controlling digital sound synthesis, triggering computer-generated audio. This study aims to shed light on how the level of perceived causality of DMI designs impacts audience members' aesthetic responses to new DMIs. In a preliminary survey, 49 concert attendees listed adjectives that described their experience of a number of DMI performances. In a subsequent experiment, 31 participants rated video clips of performances with DMIs with causal and acausal mapping designs using the 8 most popular adjectives from the preliminary survey. The experimental stimuli were presented in their original version and in a manipulated version with a reduced level of gesture-sound causality. The manipulated version was created by placing the audio track of one section of the recording over the video track of a different section. It was predicted that the causal DMIs would be rated more positively, with the manipulation having a stronger effect on the ratings for the causal DMIs. Our results confirmed these hypotheses, and indicate that a lack of perceptible causality does have a negative impact on ratings of DMI performances. The acausal group received no significant difference in ratings between original and manipulated clips. We posit that this result arises from the greater understanding that clearer gesture-sound causality offers spectators. The implications of this result for DMI design and practice are discussed.
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