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Author Topic: Rpitch  (Read 653 times)
Kara-Moon Master
Posts: 1425

« on: January 18, 2023, 06:38:56 PM »

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 Smiley

/// 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
z   /// this is here to signal the end of the pattern

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

/// 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


/// 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


Now, isn't that fun!

My online life: http://www.mellowood.ca
Sr. Member
Posts: 440

« Reply #1 on: January 19, 2023, 08:46:54 AM »

Kara-Moon Master
Posts: 1425

« Reply #2 on: January 19, 2023, 05:40:18 PM »

I hope it is more than just "cute" Smiley

The addition of the BEATS option came about because a user requested that we needed "something" for cases, like bossa and samba, jazzy-like songs where the bass hit "alternate" notes in an unpredictable pattern. Having different sequences called randomly would work, but this is much easier. Just don't overuse it.

My online life: http://www.mellowood.ca
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