A "beats" option has been added to the RPITCH command. This simple addition makes it very useful! You will need mma 21.09.3 or better to try this ... I have the example file listed here, but the original is in the source tree in egs/rpitch. Read the comments for justifications
/// A very simple RPitch demo for making an otherwise
/// boring 1/5 bass pattern a bit more exciting
/// This is the pattern we'll be using for all the examples
Mset Pattern
G
D
G
D7
z /// this is here to signal the end of the pattern
EndMset
Include stdpats
Tempo 100
Keysig C
Begin Bass
Voice FretlessBass
Sequence B1234 /// a 1,5,1,5 pattern
Octave 3
RPitch Scale=Scale Offsets=-2,-2,3 Rate=50 Beats=2,4 /// adjust bars 2 and 4
End
/// Important values in the RPITCH setting:
/// Scale ... we are using the SCALE associated with the given CHORD
/// Offsets ... offsets apply to the "distance" between the "normal"
/// note and permitted random values. So, in this example the 5th
/// of a C (major) chord is G. The "-2" is an E and "3" is another
/// C in the next octave.
/// Rate ... 50% of the time we do this, 50% we leave things alone
/// Beats ... ONLY do this if on beat 2 or 4.
Print Simple example, Bass Rpitch is: $_Bass_Rpitch
//$Pattern
/// Now, to modify an existing groove. Let's use
Groove Bossanova
Bass Rpitch Scale=Scale Offsets=-2,-2,-2,-1,-4 Rate=80 Beats=2,4
Print Bossanova try, Bass Rpitch is: $_Bass_Rpitch
$Pattern
Now, isn't that fun!
