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Musical Instruments - C-80 (1.41 mb)

Key Basic (Tx.) Rx.Channel Channel Part 1/Part 2 Power-on 1 1, 2 F11 1, 2 F#1 2 2, 3 G13 3, 4 G#1 4 4, 5 A15 5, 6 A#1 6 6, 7 B17 7, 8 C28 8, 9 C#2 9 9, 10 D2 10 10, 11 D#2 11 11, 12 E 12 12, 13 F 13 13, 14 F#2 14 14, 15 G2 15 15, 16 G#2 16 16, 1 . Decimal and Hexadecimal table In MIDI documentation, data values and addresses/sizes of exclusive messages etc. are expressed as hexadecimal values for each 7 bits. The following table shows how these correspond to decimal numbers. +——————+———————++———————+———————++———————+———————++———————+———————+ | Dec.| Hex.|| Dec.| Hex.|| Dec.| Hex.|| Dec.| Hex.| +——————+———————++———————+———————++———————+———————++———————+———————+ | 0 | 00H || 32 | 20H || 64 | 40H || 96 | 60H | | 1 | 01H || 33 | 21H || 65 | 41H || 97 | 61H | | 2 | 02H || 34 | 22H || 66 | 42H || 98 | 62H | | 3 | 03H || 35 | 23H || 67 | 43H || 99 | 63H | | 4 | 04H || 36 | 24H || 68 | 44H || 100 | 64H | | 5 | 05H || 37 | 25H || 69 | 45H || 101 | 65H | | 6 | 06H || 38 | 26H || 70 | 46H || 102 | 66H | | 7 | 07H || 39 | 27H || 71 | 47H || 103 | 67H | | 8 | 08H || 40 | 28H || 72 | 48H || 104 | 68H | | 9 | 09H || 41 | 29H || 73 | 49H || 105 | 69H | | 10 | 0AH || 42 | 2AH || 74 | 4AH || 106 | 6AH | | 11 | 0BH || 43 | 2BH || 75 | 4BH || 107 | 6BH | | 12 | 0CH || 44 | 2CH || 76 | 4CH || 108 | 6CH | | 13 | 0DH || 45 | 2DH || 77 | 4DH || 109 | 6DH | | 14 | 0EH || 46 | 2EH || 78 | 4EH || 110 | 6EH | | 15 | 0FH || 47 | 2FH || 79 | 4FH || 111 | 6FH | | 16 | 10H || 48 | 30H || 80 | 50H || 112 | 70H | | 17 | 11H || 49 | 31H || 81 | 51H || 113 | 71H | | 18 | 12H || 50 | 32H || 82 | 52H || 114 | 72H | | 19 | 13H || 51 | 33H || 83 | 53H || 115 | 73H | | 20 | 14H || 52 | 34H || 84 | 54H || 116 | 74H | | 21 | 15H || 53 | 35H || 85 | 55H || 117 | 75H | | 22 | 16H || 54 | 36H || 86 | 56H || 118 | 76H | | 23 | 17H || 55 | 37H || 87 | 57H || 119 | 77H | | 24 | 18H || 56 | 38H || 88 | 58H || 120 | 78H | | 25 | 19H || 57 | 39H || 89 | 59H || 121 | 79H | | 26 | 1AH || 58 | 3AH || 90 | 5AH || 122 | 7AH | | 27 | 1BH || 59 | 3BH || 91 | 5BH || 123 | 7BH | | 28 | 1CH || 60 | 3CH || 92 | 5CH || 124 | 7CH | | 29 | 1DH || 61 | 3DH || 93 | 5DH || 125 | 7DH | | 30 | 1EH || 62 | 3EH || 94 | 5EH || 126 | 7EH | | 31 | 1FH || 63 | 3FH || 95 | 5FH || 127 | 7FH | * Decimal values such as MIDI channel and program change are listed as one (1) greater than the values given in the above table. * A 7-bit byte can express data in the range of 128 steps. For data where greater precision is required, we must use two or more bytes. For example, two hexadecimal numbers aa bbH expressing two 7-bit bytes would indicate a value of aa x 128 + bb. * In the case of values which have a +/-sign, 00H = -64, 40H = +/-0, and 7FH = +63, so that the decimal expression would be 64 less than the value given in the above chart. In the case of two types, 00 00H = -8192, 40 00H = +/-0, and 7F 7FH = +8191. For example if aa bbH were expressed as decimal, this would be aa bbH - 40 00H = aa x 128 + bb - 64 x 128. What is the decimal expression of 5AH? >From the preceding table, 5AH = 90 What is the decimal expression of the value 12 34H given as hexadecimal for each 7 bits? >From the preceding table, since 12H = 18 and 34H = 52 18 x 128 + 52 = 2356 . Examples of actual MIDI messages 92 3E 5F 9n is the Note-on status, and n is the MIDI channel number. Since 2H = 2, 3EH = 62, and 5FH = 95, this is a Note-on message with MIDI CH = 3, note number 62 (note name is D4), and velocity 95. CE 05 CnH is the Program Change status, and n is the MIDI channel number. Since EH = 14 and 05H = 05, this is a Program Change message with MIDI CH = 15, program number 05 (Celesta in C-80). B3 64 00 65 01 06 40 26 00 64 7F 65 7F BnH is the Control Change status, and n is the MIDI channel number. For Control Changes, the 2nd byte is the control number, and the 3rd byte is the value. In a case in which two or more messages consecutive messages have the same status, MIDI has a provision called “running status” which allows the status byte of the second and following messages to be omitted. Thus, the above messages have the following meaning. B3 64 00 MIDI ch.4, lower byte of RPN parameter number: 00H (B3) 65 01 (MIDI ch.4) upper byte of RPN parameter number: 01H (B3) 06 40 (MIDI ch.4) upper byte of parameter value: 40H (B3) 26 00 (MIDI ch.4) lower byte of parameter value: 00H (B3) 64 7F (MIDI ch.4) lower byte of RPN parameter number: 7FH (B3) 65 7F (MIDI ch.4) upper byte of RPN parameter number: 7FH In other words, the above messages specify a value of 40 00H for RPN parameter number 00 01H on MIDI channel 4, and then set the RPN parameter number to 7F 7FH (RPN null). Once the parameter number has been specified for RPN, all Data Entry messages transmitted on that same channel will be valid, so after the desired value has been transmitted, it is a good idea to set the parameter number to 7F 7FH to prevent accidents. This is the reason for the (B3) 64 7...

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