Intonation control represents one of the most demanding aspects of wind instrument performance, requiring musicians to integrate auditory, visual, and kinesthetic feedback in real time. Traditional needle tuners have long been used to support pitch accuracy, but their reliance on continuous visual monitoring can interfere with performance flow. The present study aimed to compare three feedback systems for horn performance—(1) a conventional needle tuner, (2) a Google Glass-based augmented reality (AR) tuner, and (3) a color-based tuner that visualizes pitch deviation through color changes—to identify their pedagogical potential and ergonomic limitations.Three experienced university horn players participated in the experiment. Each performer played under all three feedback conditions while maintaining identical musical tasks. After each session, participants completed a structured questionnaire assessing posture maintenance, pitch recognition, visibility, responsiveness, and overall playability on six-point scales, supplemented by open-ended qualitative comments. Quantitative data were analyzed descriptively, and thematic analysis was applied to open-ended responses.The results revealed clear patterns across systems. The color tuner was consistently rated highest for intuitiveness, comfort, and ease of use. Its color-based feedback allowed players to monitor pitch peripherally without interrupting musical flow, leading to greater confidence and smoother ensemble coordination. The needle tuner was valued for its precision, especially in fine-tuning adjustments, and participants suggested that combining both color and needle displays might provide optimal training support. By contrast, the Google Glass system received the lowest evaluations, primarily due to visual interference and auditory contamination from surrounding sounds. While its hands-free design theoretically supports performance integration, in practice it reduced visual stability and pitch confidence.These findings highlight that intuitive, low-load feedback designs may enhance learning efficiency and reduce attentional burden during performance. Simpler visual representations, such as color-based cues, appear to promote real-time awareness and engagement more effectively than complex AR displays. Pedagogically, the results suggest that color tuners are particularly beneficial for beginners developing basic intonation skills, whereas needle tuners remain essential for advanced performers refining just intonation. Although the AR-based system showed conceptual promise, further improvements in sound-source separation, latency, and display ergonomics are necessary before it can be effectively adopted in ensemble contexts.Overall, the study contributes empirical insights into how varying feedback modalities affect brass players’ performance experience and provides design implications for the future development of intuitive, technology-enhanced music training tools.