While C4 is the generally accepted international standard for middle C, it varies between instrument makers. For example, for middle C: Roland uses C4, Yamaha uses C3, Fruity Loops uses C5 (if I recall correctly). The standalone version of BIAB also denotes middle C as C5 in both notation and Piano Roll. Are you saying that depending on how your view BIAB on the PG Music app, that middle C is denoted differently?


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Audiophile BIAB 2026