Choir spacingthe physical arrangement of singersis known to influence ensemble sound and individual singing experience, yet systematic perceptual studies remain limited by the logistical challenges of conducting experiments with full choirs. This early-stage study introduces a virtual acoustics system designed to enable controlled testing of choir spacing effects. The system combines pre-recorded anechoic choir tracks with binaural room impulse responses (BRIRs) simulated using the simulation software RAVEN, representing a large concert hall. EQ-compensated signals were rendered to individual singers via closed-back headphones. In each session, one participant performed their part live along with pre-recorded voices of the other choir members, creating a virtual ensemble under controlled acoustic conditions. Thirty-nine experienced choir singers performed with the virtual choir under three spacing configurations: Close, Lateral, and Circumambient. Singing performances were recorded for subsequent analysis as part of an ongoing larger study. After each condition, singers completed a questionnaire assessing perception of self and others, vocal effort, intonation, ensemble blend, and concert spacing preference. Results indicate that singers strongly preferred spread spacing (Lateral or Circumambient) for self-monitoring, vocal comfort, and blending with the ensemble. Hearing of self was consistently rated better in spread configurations, while perception of other voice parts remained relatively stable. Reported vocal effort decreased with increasing spacing. The majority of singers also expressed a clear preference for spread spacing in concert settings. This contribution reports first perceptual findings obtained with the system and demonstrates the feasibility of using virtual acoustics to explore spacing effects in choral performance.
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