Musicians agree on this book: 

"Conga Drums in Space and Time" reveals REVOLUTIONARY NEW PERSPECTIVES in percussion musical nomenclature, in which the author redefines conventional quarter, eighth, and so forth notes, through his innovative "Theory of Time Positions" where he lays out time scales for 6/6 and 8/8 time bars following his new Elemental Chronometric Positions defining the value and function of each note in terms of its position within the bar, rather than its duration, which is instantaneous (as percussion attack).

Further complementing Pardo's position scales, this Manual of ancient and modern Afro-Cuban rhythms illustrates over 77 hand drum patterns using the book's second revolution, this time in the notation, the Handbook of Tumbaos which unlike the many attempts to notate hand drums that float around, on the basis of conventional musical pentagram notation and mixed with directions as to which hand to use, in this case is a innovative graphic system, The Hand Drum Notation (HDN) that visually defines the hand sequence and type of attack for hand drums such as Congas and Bongos.    The simplicity and directness of HDN are validated by the ease of learning to sight-read complex patterns (Tumbaos) in a matter of minutes, as experienced by Pardo's Yambú Academy students.