# Utility nodes

> Nodes in the Utility category.

Source: https://docs.tune.toys/nodes/category/utility/

- Channel matrix (std.matrix): Route and mix input channels into a declared output bundle with explicit gains.
- Combine channels (std.combine): Concatenate two audio buses, preserving every channel without mixing.
- Compare (std.compare): Turn any signal into a gate or trigger by comparing it to a threshold or to another signal, lane by lane, with hysteresis and tolerance.
- Crossfade (std.crossfade): Blend two signals with one balance control: 0 plays A, 1 plays B.
- Gain (std.gain): A clean multichannel gain stage.
- Math (std.math): Arithmetic on any signal, lane by lane: add, multiply, divide, power and more on audio or control operands. The output runs at the rate of its fastest input.
- Mixer (std.mixer): Sum up to 32 channels, each with gain, pan, mute and solo, into one mix with a master level. Plug a cable in to add a channel.
- Receive (bus.receive): Pick up a named bus without a cable. Its type and width follow whatever drives the Send.
- Select channels (std.select): Extract a contiguous channel range. Use several selectors to split a bundle.
- Send (bus.send): Name a bus and send a signal to it. Every Receive with the same name in this definition hears it.
- Tuner (std.tuner): Passes audio through unchanged and shows the nearest degree of a microtonal tuning on its face. Mute silences it like a tuner pedal.