Saturday, 21 July 2018

Modular on the Lounge 4

Thanks Terry and Stella for hosting.

Lots of fun.

aNDREW AKA Virusinstaller

Paul aka Allinaire


Modular in the Kitchen.


Wow... a ER 301 Sound Computer



 Folktek Mescaline

Polyrhythms, Polymeters , etc

This is an open ended post and I'll probably edit it as I go along.
Arturia just released their new drum machine .. the Drumbrute Impact.
It sounds awesome and I'm so on the verge of buying one. The specs of the drum claim the sequencer is capable of Polyrhythms. Is this the case ? A few of my muso friends argue that the drum does polymeters not polyrhythms. What exactly are polyrhythms and how do they differ from polymeters?

It seems that there is a common misuse of the term PolyRhythm to mean PolyMeter and vice versa.

A few definitions first:
"A PolyMeter is when two or more musical phrases have a different number of beats within DIFFERENT  sequence lengths ; each cycles independently & the sequence will complete when each completes the number of bars of the others beat number
e.g 4 beats kick x 5 bars = 5 beats snare x 4 bars"
The beats have a common pulse or tempo .... they fall on the same grid... but have different lengths (different numbers of beats).

A PolyRhythm is when two or more musical phrases have a different number of beats within the
SAME  sequence length : eg 3 beats of kick will play in the same time as 5 beats of snare .
The beats have different pulses or tempos but the  bars line up to be the same length.

A good example of a polyrhythm can be found in Nine Inch Nails' "La Mer".

Its a beautiful soothing track. At 1:20 the drums start. They play four beats against the three beats of the piano.

A very basic example of a polyrhythm is the "Hemiola" .
It's found in lots of African music, and also in Baroque ... such as in Handels Water Music Suite.
It refers to three beats of equal value in the time normally occupied by two beats.
This is also known as triplets over duplets.
By Dr clave at English Wikipedia, CC BY-SA 3.0,

The Hemiola is a 3:2 polyrhythm.
The polyrhythmic formula is X:Y or X over Y.
Y is the basic pulse.
X is the counter rhythm

A polyrhythm can only occur if there is no number beside 1 that will divide into both.
Thus 3:2 is a polyrhythm. As are 4:3, 5:4, 3:5, or 4:7


In comparison, the key to creating polymeters appears to be the ability to change the sequence (or bar or pattern) length (which the Drumbrute can certainly do). The basic example of polymeter used above (4/4 time signature): 4 beats kick x 5 bars = 5 beats snare x 4 bars" 

The 4-step loop is juxtaposed with a 5 step loop. As the two loops play it will take 5 repetitions of the 4-step loop, and 4 repetitions of the 5 step loop for both to end up at the same place.

To anyone reading this that has purchased a new drumbrute,..... can you please let me know if the drum is capable of polyrhythms or is it polymetric?

And what other instruments are capable of polyrhythms?
+ MakeNoise tempi --- when in machine programming mode
+ Squarp - Pyramid sequencer
+ Buchla 252e

+ Abelton

Muffs: polyrhythms modules

Thursday, 19 July 2018

Uxmal - Mexico

The zone was first settled in 500AD and Uxmal was founded c. A.D. 700.

It's 62 kilometers south of Merida, in the Santa Elena valley, forming the centre of the Puuc ("hill" or "chain of low mountains") region.

 This is the house or "Pyramid of the Magician" ...aka "Pyramid of the Soothsayer"

In the 9th and 12th centuries AD it became the seat of Mayan political and economic power.

, Uxmal is not laid out geometrically. Its space is organized in relation to astronomical phenomena, such as the rising and setting of Venus.

The house of the magician rises 90.5 feet (27.6 metres) in three concentric sections.  The temple at the top section has a doorway in the form of a Chac mask. It is also known as the House of the Dwarf (“Casa del Enano”) because of an ancient legend stating that it was built overnight by an enchanted dwarf who then became the city’s ruler.

Uxmal is a dry grass savanna area. Water was provided by cenotes (wells formed by sinkholes in 
limestone understrata).

 tHE Ballcourt - Pelota
 Constructed during the 9th and early 10th century.
Notice the "rings"
Pelota was a prestigious ceremonial activity and was associated with rulers and at the same time the humiliation of captives. The game was played with a solid rubber ball, whose diameter varied between 20cm and 35cm. The ball could only be touched with the hips, elbows and knees. Players wore leather protective clothing.

 The Cemetry Complex
 iTS not a real cemetery. The name comes from the relief's of skulls and crossed bones.

To be continued....