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SoundIn.ar reads from the sound card's input buses; use headphones to prevent feedback

Concept L2First instrument F · Live coding: music N · Tools & free/open software stack

SoundIn.ar(0) reads from the first input channel of the sound card (equivalent to In.ar(8) since input buses start at 8 by default). SoundIn.ar([0,1]) reads stereo. This signal can then be processed with any UGen (FreeVerb, BPF, etc.). Headphones are essential when monitoring live input to prevent feedback. Unlike In.ar, SoundIn automatically handles the bus offset for inputs.

Examples

{SoundIn.ar(0)}.play; // mono mic in {FreeVerb.ar(SoundIn.ar([0,1]),mix:0.5,room:0.9)}.play; // stereo with reverb

Assessment

Write a synth that adds a resonant BPF to microphone input with the cutoff controlled by MouseY.

Prerequisites — understand these first

Don't confuse with

SuperCollider responds to incoming MIDI by registering callback functions on MIDI message types

Sources

“easily access sound input from your sound card with the SoundInUGen. ∗ 1// Warning: use headphones to avoid feedback 2{SoundIn.ar(0)}.play;”

corpus · a-gentle-introduction-to-supercollider-ruviaro-archive-org-c · chunk 12

Taught in modules

Unlocks (1) — atoms that build on this

SuperCollider's Pitch and Amplitude UGens extract frequency and loudness from audio input in real time