Max

Overview

Use openscofo~ to follow a score from a mono signal, report event/BPM, deliver actions to Max receivers, and optionally output descriptors.

Object	Use
`openscofo~`	score following
`openscofo~ rms centroid mfcc`	score following plus descriptor output

Install the Max external from the OpenScofo release matching your platform, then restart Max if needed.

Relative score paths are resolved from the current patch directory.

Message	Purpose
`score <path>`	load a `.scofo` file
`start`	reset to event `0` and start following
`follow 1`, `follow 0`	enable or disable following
`set event <index>`	force the current score event
`set verbosity <0..3>`	set console logging level
`set description <0 or 1>`	enable descriptor-only processing
`set onnxmodel <path> <descriptors...>`	load an ONNX model with descriptor order
`get descriptors <buffer> [start-frame]`	analyze one FFT window from a Max `buffer~`

Outlets:

Outlet	Output
left	current score event index
middle	current BPM
right	descriptor messages, only when descriptors are requested

NOTE C4 1
    sendto delay [1 C4]
    delay 1 tempo sendto delay [0 C4]

Receive in Max:

r delay

No-argument sendto sends a bang; arguments are sent as a Max list. For shared action syntax, see Computer Actions.

Request descriptors as creation arguments:

openscofo~ rms db centroid mfcc chroma

Vector descriptors such as mfcc, chroma, logmel, and magnitude output lists. Scalar descriptors output one float.

See Your First Interactive Patch for the smallest complete patch.

Lua actions run when the external is built with Lua support. Inside LUA { ... }, use the max module; see Lua.