411 REFERENCE · Wikibooks
Designing Sound in SuperCollider/Pedestrians
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Fig 24.4: pedestrian crossing beeps (UK-style)
The LFPulse here is used to provide a sharp-edged on/off for the sound. (LFPulse outputs a low of zero and a high of one, which is handy in this case so we don't need to re-scale it before we can use it as the multiplier.)
(
Ndef(\pedestrian, {
SinOsc.ar(2500, 0, 0.2) * LFPulse.ar(5)
}).play
)
Dan Stowell