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040000 tree 26634febb2dd9d33808ecfada77ccf003be8adbc	input_monitor
040000 tree 62dccb858c0137d597ee64519334d3baee1a4cac	loopback
040000 tree a3be1d56baf7ba10ab560c757dbae1bc96dde755	utils
040000 tree 5a07fa41412b30bd50240d7ec25c2a9fa9f3ee76	write_sine