We investigated perception of virtual pitches at missing fundamentals (MFs) in musical chords of three chromas (simultaneous trichords). Tone profiles for major, minor, diminished, augmented, suspended, and four other trichords of octave-complex tones were determined. In Experiment 1, 40 musicians rated how well a tone went with a preceding chord; in Experiment 2, whether the tone was in the chord. Mean ratings for nine non-chord tones were compared with predictions of four models: MFs, diatonicity, 5th-interval relations, and tones that complete familiar tetrachords (e.g., 7th chords). Profiles were accounted for by all four models in Experiment 1, and two (MFs, 5th relations) in Experiment 2. Overall, effect size was largest for MFs. In Experiment 3, listeners heard a chord and chose a matching tone from 12 possibilities. Profile peaks were predicted by pitch models (usually, the lower tone of a perfect 5th). Participants who more likely attended to MFs in isolated harmonic complex tones (fundamental listeners) were not more sensitive to MFs in chords, suggesting their responses instead depended on statistical properties of familiar music. We propose a speculative, psychohistoric explanation: MFs influenced the historical development of musical structure, which in turn influenced the perception of enculturated modern listeners.

Internet-based communication technologies can reduce both carbon emissions and financial costs of academic conferences for individual participants-especially those from non-rich countries. We consider currently available technological solutions and logistic formats. In July 2018, we organized the leading international conference on music cognition (ICMPC15/ESCOM10) as a multiple-location, semi-virtual event with hubs on four continents (Europe, North America, South America, Australia) and 600 active participants. Every talk was live-streamed to YouTube (unlisted with URLs accessible only to registered participants) and seen by two audiences (local, remote). Remote presentations were either real-time or delayed. Discussions were two-way audiovisual (Zoom). Student assistants managed the technology. The 24-hour program ran for five days, with normal working hours at each hub. Most (61%) participants approved of the semi-virtual format. Greenhouse-gas emissions per participant were reduced by 60-70% relative to an equivalent single-location conference. No talk was delayed or canceled for technical reasons. A semi-virtual, multiple-location approach improves the globality, cultural diversity, and accessibility of academic conferences. That in turn improves the relevance and long-term quality of academic content. In future, emissions and international time-difference problems can be further reduced by increasing the number of hubs. Every academic conference, regardless of size, discipline, or country, can benefit from live-streaming some or all presentations. Conference participants and organizers can contribute to global mitigation efforts while at the same time promoting their academic disciplines by taking advantage of modern internet communication technologies. Video recordings of talks contribute to documentation and dissemination.

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