Looper's Delight Archive Top (Search)
Date Index
Thread Index
Author Index
Looper's Delight Home
Mailing List Info

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Date Index][Thread Index][Author Index]

RE: BPM & Pitch Shift on Repeater



Paul,

 I can help you with the midi value -> tempo adjustment numbers, but I'll
need to do a little some research into how tempo adjustments map into pitch
shifting. But, my numbers don't seem to match your trial and error numbers,
where a tempo change of 0 should result in no pitch shifting. My numbers
show 'no pitch shift' to be around 42 or 43, not 76 as you suggested.

Please find enclosed a text file listing your midi->tempo mapping.

peace
-cpr

>-- Original Message --
>Date: Thu, 6 Nov 2003 20:28:50 +0000
>Subject: BPM & Pitch Shift on Repeater
>From: Paul Greenstein <paul@ubiq.co.uk>
>To: loopers-Delight@loopers-delight.com
>Reply-To: Loopers-Delight@loopers-delight.com
>
>
>Being a mathematical dunce, I'm having difficulty working out the
>relationship between midi controller values and tempo/pitch shift.
>
>The manual says:
>
>(using cc 14)  (-75%+150%) adjusts the tempo and pitch as a percentage

>of the current tempo. 76 is zero shift.
>
>I've made this work via trial and error - for example, a value of 25
>seems to reduce the pitch by -12 , but it would be nice to be able to
>predict the relative tempo change as well...
>
>Maybe someone out there knows what I'm on about...
>
>
>
>
>Paul
>


Tempo Adjustment = (MidiValue * 1.77) - 75

Midi Value = 0 -> Tempo Adjustment = %-75
Midi Value = 1 -> Tempo Adjustment = %-74
Midi Value = 2 -> Tempo Adjustment = %-72
Midi Value = 3 -> Tempo Adjustment = %-70
Midi Value = 4 -> Tempo Adjustment = %-68
Midi Value = 5 -> Tempo Adjustment = %-67
Midi Value = 6 -> Tempo Adjustment = %-65
Midi Value = 7 -> Tempo Adjustment = %-63
Midi Value = 8 -> Tempo Adjustment = %-61
Midi Value = 9 -> Tempo Adjustment = %-60
Midi Value = 10 -> Tempo Adjustment = %-58
Midi Value = 11 -> Tempo Adjustment = %-56
Midi Value = 12 -> Tempo Adjustment = %-54
Midi Value = 13 -> Tempo Adjustment = %-52
Midi Value = 14 -> Tempo Adjustment = %-51
Midi Value = 15 -> Tempo Adjustment = %-49
Midi Value = 16 -> Tempo Adjustment = %-47
Midi Value = 17 -> Tempo Adjustment = %-45
Midi Value = 18 -> Tempo Adjustment = %-44
Midi Value = 19 -> Tempo Adjustment = %-42
Midi Value = 20 -> Tempo Adjustment = %-40
Midi Value = 21 -> Tempo Adjustment = %-38
Midi Value = 22 -> Tempo Adjustment = %-37
Midi Value = 23 -> Tempo Adjustment = %-35
Midi Value = 24 -> Tempo Adjustment = %-33
Midi Value = 25 -> Tempo Adjustment = %-31
Midi Value = 26 -> Tempo Adjustment = %-29
Midi Value = 27 -> Tempo Adjustment = %-28
Midi Value = 28 -> Tempo Adjustment = %-26
Midi Value = 29 -> Tempo Adjustment = %-24
Midi Value = 30 -> Tempo Adjustment = %-22
Midi Value = 31 -> Tempo Adjustment = %-21
Midi Value = 32 -> Tempo Adjustment = %-19
Midi Value = 33 -> Tempo Adjustment = %-17
Midi Value = 34 -> Tempo Adjustment = %-15
Midi Value = 35 -> Tempo Adjustment = %-14
Midi Value = 36 -> Tempo Adjustment = %-12
Midi Value = 37 -> Tempo Adjustment = %-10
Midi Value = 38 -> Tempo Adjustment = %-8
Midi Value = 39 -> Tempo Adjustment = %-6
Midi Value = 40 -> Tempo Adjustment = %-5
Midi Value = 41 -> Tempo Adjustment = %-3
Midi Value = 42 -> Tempo Adjustment = %-1
Midi Value = 43 -> Tempo Adjustment = %1
Midi Value = 44 -> Tempo Adjustment = %2
Midi Value = 45 -> Tempo Adjustment = %4
Midi Value = 46 -> Tempo Adjustment = %6
Midi Value = 47 -> Tempo Adjustment = %8
Midi Value = 48 -> Tempo Adjustment = %9
Midi Value = 49 -> Tempo Adjustment = %11
Midi Value = 50 -> Tempo Adjustment = %13
Midi Value = 51 -> Tempo Adjustment = %15
Midi Value = 52 -> Tempo Adjustment = %17
Midi Value = 53 -> Tempo Adjustment = %18
Midi Value = 54 -> Tempo Adjustment = %20
Midi Value = 55 -> Tempo Adjustment = %22
Midi Value = 56 -> Tempo Adjustment = %24
Midi Value = 57 -> Tempo Adjustment = %25
Midi Value = 58 -> Tempo Adjustment = %27
Midi Value = 59 -> Tempo Adjustment = %29
Midi Value = 60 -> Tempo Adjustment = %31
Midi Value = 61 -> Tempo Adjustment = %32
Midi Value = 62 -> Tempo Adjustment = %34
Midi Value = 63 -> Tempo Adjustment = %36
Midi Value = 64 -> Tempo Adjustment = %38
Midi Value = 65 -> Tempo Adjustment = %40
Midi Value = 66 -> Tempo Adjustment = %41
Midi Value = 67 -> Tempo Adjustment = %43
Midi Value = 68 -> Tempo Adjustment = %45
Midi Value = 69 -> Tempo Adjustment = %47
Midi Value = 70 -> Tempo Adjustment = %48
Midi Value = 71 -> Tempo Adjustment = %50
Midi Value = 72 -> Tempo Adjustment = %52
Midi Value = 73 -> Tempo Adjustment = %54
Midi Value = 74 -> Tempo Adjustment = %55
Midi Value = 75 -> Tempo Adjustment = %57
Midi Value = 76 -> Tempo Adjustment = %59
Midi Value = 77 -> Tempo Adjustment = %61
Midi Value = 78 -> Tempo Adjustment = %63
Midi Value = 79 -> Tempo Adjustment = %64
Midi Value = 80 -> Tempo Adjustment = %66
Midi Value = 81 -> Tempo Adjustment = %68
Midi Value = 82 -> Tempo Adjustment = %70
Midi Value = 83 -> Tempo Adjustment = %71
Midi Value = 84 -> Tempo Adjustment = %73
Midi Value = 85 -> Tempo Adjustment = %75
Midi Value = 86 -> Tempo Adjustment = %77
Midi Value = 87 -> Tempo Adjustment = %78
Midi Value = 88 -> Tempo Adjustment = %80
Midi Value = 89 -> Tempo Adjustment = %82
Midi Value = 90 -> Tempo Adjustment = %84
Midi Value = 91 -> Tempo Adjustment = %86
Midi Value = 92 -> Tempo Adjustment = %87
Midi Value = 93 -> Tempo Adjustment = %89
Midi Value = 94 -> Tempo Adjustment = %91
Midi Value = 95 -> Tempo Adjustment = %93
Midi Value = 96 -> Tempo Adjustment = %94
Midi Value = 97 -> Tempo Adjustment = %96
Midi Value = 98 -> Tempo Adjustment = %98
Midi Value = 99 -> Tempo Adjustment = %100
Midi Value = 100 -> Tempo Adjustment = %102
Midi Value = 101 -> Tempo Adjustment = %103
Midi Value = 102 -> Tempo Adjustment = %105
Midi Value = 103 -> Tempo Adjustment = %107
Midi Value = 104 -> Tempo Adjustment = %109
Midi Value = 105 -> Tempo Adjustment = %110
Midi Value = 106 -> Tempo Adjustment = %112
Midi Value = 107 -> Tempo Adjustment = %114
Midi Value = 108 -> Tempo Adjustment = %116
Midi Value = 109 -> Tempo Adjustment = %117
Midi Value = 110 -> Tempo Adjustment = %119
Midi Value = 111 -> Tempo Adjustment = %121
Midi Value = 112 -> Tempo Adjustment = %123
Midi Value = 113 -> Tempo Adjustment = %125
Midi Value = 114 -> Tempo Adjustment = %126
Midi Value = 115 -> Tempo Adjustment = %128
Midi Value = 116 -> Tempo Adjustment = %130
Midi Value = 117 -> Tempo Adjustment = %132
Midi Value = 118 -> Tempo Adjustment = %133
Midi Value = 119 -> Tempo Adjustment = %135
Midi Value = 120 -> Tempo Adjustment = %137
Midi Value = 121 -> Tempo Adjustment = %139
Midi Value = 122 -> Tempo Adjustment = %140
Midi Value = 123 -> Tempo Adjustment = %142
Midi Value = 124 -> Tempo Adjustment = %144
Midi Value = 125 -> Tempo Adjustment = %146
Midi Value = 126 -> Tempo Adjustment = %148
Midi Value = 127 -> Tempo Adjustment = %149