Tinker CV Math Assistant

Tinker is a free Rack Extension for entering mathematical formulas to manipulate CV signals. A formula can contain numbers, variables, constants, operators, functions, and parentheses. The result of evaluating a formula is clearly displayed, and an integrated help menu lists all available functionality for quick reference. Tinker also supports patch loading and a configurable patch description.

You could use Tinker to perform arithmetic between different CV inputs, generate a tempo-synced waveform, build branched routings using the built-in knob and switch, and more. Explore endless possibilities!

Formulas support all of the following features (as well as numbers and parentheses):

Variables:

• A - CV Input A
• B - CV Input B
• C - CV Input C
• D - CV Input D
• W - CV Input W
• X - CV Input X
• Y - CV Input Y
• Z - CV Input Z
• K - Knob
• S - Switch
• t - Position (0 to 1) within synced or free cycle
• qpm - Current tempo (quarter notes per minute)

Constants:

• pi - 3.14159…
• e - 2.71828…

Operators:

• -A - Negation
• A+B - Addition
• A-B - Subtraction
• A*B - Multiplication
• A/B - Division
• A%B - Remainder after division

Functions:

• abs(A) - Returns absolute value
• toUni(A) - Converts bipolar to unipolar
• toBi(A) - Converts unipolar to bipolar
• clamp(A,B,C) - Clamps A between B and C
• trunc(A) - Returns integral part of A
• round(A) - Rounds A to nearest integer
• sin(A) - Sine function
• cos(A) - Cosine function
• pow(A,B) - Returns A to the power B
• ln(A) - Natural logarithm
• min(P1,P2,…) - Returns minimum of arguments
• max(P1,P2,…) - Returns maximum of arguments
• select(A,P1,P2,…) - Uses A (0 to 1) to select from one or more arguments
• lerp(A,P1,P2,…) - Uses A (0 to 1) to interpolate one or more arguments