otis is a delay/looper/sampler inspired by Peter Blasser’s Cocoquantus, and named after a childhood pet. made possible by @zebra’s wonderful softcut.

by @justmat

requirements

norns

documentation

otis v2.1

stereo “tape” delay/looper thing for norns

join the conversation at - https://llllllll.co/t/22149

there are three pages, mix, play, and edit. navigate with encoder 1. hold key 1 for ALT.

mix

• key 2 = mute L

• key 3 = mute R

• enc 2 = vol L
• enc 3 = vol R
• ALT + enc 2 = pan L
• ALT + enc 3 = pan R

play

• key 2 = flip L
• key 3 = flip R
• ALT + key 2 = skip L

• ALT + key 2 = skip R

• enc 2 = tape speed L
• enc 3 = tape speed R
• ALT + enc 2 = feedback L
• ALT + enc 3 = feedback R

nb: tape speed behavior by default is free; however, it can be quantized to many different scales via the parameters menu. skip behavior by default is a loop reset; however, it can be configured to jump to random positions via the parameters menu.

edit

• key 2 = rec L on/off
• key 3 = rec R on/off
• ALT + key 2 = clear buffer L

• ALT + key 3 = clear buffer R

• enc 2 = left loop start
• enc 3 = right loop start
• ALT + enc 2 = left loop end
• ALT + enc 3 = right loop end

_nb: turning rec L/R off will hold the buffer, allowing use as a looper._

_nb: on all pages, alt + enc 1 toggles between fine and coarse parameter adjustments. turn enc 1 right for fine, left for coarse._

grid

• L/R loops are laid out identically.
• touch a key inside the “loop position” area to jump to that point in the loop.
• holding the grid alt button and touching one of the speed up/down buttons will return speed to 1.
• holding the grid alt button and turning enc 2/3 will “slide” your L/R loops around the buffer.

lfo’s

while holding an lfo on button you can edit lfo parameters with the norns encoders and keys:

• enc 1: lfo speed/frequency
• enc 2: lfo depth
• enc 3: lfo offset
• key 2/3: set lfo shape

to “patch” an lfo:

• hold an lfo on button
• adjust lfo settings
• touch a control

holding the grid alt button and pressing in the lfo section will “un-patch” the lfo.

speed scales

speed scales are collections of 6 speeds that are playable via the grid. adding your own “tunings” is easy.

• connect norns to wifi and launch maiden
• open the dust/code/otis/lib folder
• open the file named spds.lua

to add your custom scale, simply:

• add the scale name to the spds.names table. (it’s likely best to avoid spaces and special characters)

• add a spds.YourNameGoesHere table containing six numbers 0-4.

that’s it! you’re a musical hacker person now!

parameter details

l/r loops

• vol - loop volume
• speed - playback and recording speed
• speed slew - the time it takes for your speed to “settle” at its destination speed.
• loop start - start of your loop in seconds
• loop end - end of your loop in seconds
• feedback - how much of your overwritten material should stick around? 1 is all, 0 is none.
• rec - enable/disable recording
• pan - stereo posistion
• pan slew - time it takes for your pan position to “settle” at its destination position.

engine

• sample rate
• bit depth
• saturation - tape style saturation amount
• crossover - crossover frequency for the effect filters
• tone
• noise - tape hiss amount

config

• skip controls - whether skip jumps back to the start of your loop, or to a random position
• speed scale - set your speed scale/quantizing
• audio routing - set the signal flow. default is input + softcut -> engine.

modulation

• lfo target - select parameter to modulate
• lfo shape - sine, square, sample and hold, l env follower, r env follower
• lfo depth - amount of modulation
• offset - lfo offset amount
• lfo freq - lfo speed
• lfo - lfo on/off toggle