雅马哈伴奏文件格式
SFF（Style File Format）是Yamaha原创的伴奏文件格式，它采用独特的转换机制，能提供基于各种和弦类型的高品质自动伴奏。 SFF GE（Guitar Edition，又称SFF2）是SFF的增强格式，带有改进的吉他音轨音符转换。
SFF格式代际支持向下兼容，不支持向上兼容。
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