QRST (Quasi-Random Sequence Transform
I’ve been thinking about randomness and melodic progressions recently and In addition to the probabilistic quantizer I posted, I thought I would revisit the Turing module. The Turing module produces a quasi-random sequence of bits which is translated to an output value by an 8 bit DAC and scaled to 1. I decided that I wanted more control over the range and distribution of the randomness. Like the uTuring the QRST has an adjustable 1 to 16 step shift register. The ? control sets the probability that a step will change and the width sets the maximum amount of that change. There is a minimum and maximum value for the output and a center value around which the output will cluster. The distribution control sets the width of the distribution of values around the center. At minimum the output distribution will be very narrow and at maximum the distribution will be random.
I/O
| Input |
Signal Range |
Notes |
| clock |
0-1 gate |
the shift register moves one step with each clock |
| reset |
0-1 gate |
resets the register to 0 |
| Output |
Signal Range |
Notes |
| sequencer out |
minimum-maximum |
range set by min and max knobs |
Controls
| Control |
Function |
Notes |
| ? |
sets the probability that the step will change |
|
| steps |
sets the number of steps from 1-16 |
|
| max |
sets the maximum output value |
|
| center |
sets the center of the distribution |
|
| min |
sets the minimum output value |
|
| width |
sets the maximum change value for a step |
|
| distribution |
sets the width of the distribution form narrow to random |
|
Displays
| Meter |
Displays |
Notes |
| LED array |
displays the current output as a percent of the total range |
|
Version History
| Revision |
File |
Date |
Notes |
| 1.0 |
QRST V1.0.audulus (141.5 KB) |
01/21/2019 |
initial upload to forum |
Demos
6 Likes
Woah, this looks like a good one! can’t wait to dig in!
1 Like
Thanks. I’ve gotten a bit tired of the uTuring/uQuant combo so I’m trying a different approach. This, with the probabilistic quantizer can be a bit less random. Modulating the settings on the quantizer can lead to some interesting results. The QRST could also be useful for modulation particularly with min=0. max=1, a fairly narrow width and perhaps some slew limiting
3 Likes
JFET on the kick, heavy sc compression and the Afterburn OD module. Switched out the additive vco for some basic fm to free the cpu.
I like the gluing with these dynamics modules.
Reconvene Overdriven.audulus (1.4 MB)
1 Like
The Linnish kick is heavy!
Reconvene (infinite tension).audulus (1.8 MB)
1 Like
