Using timepoints for interactive sequencing

The timepoint object sends out a bang when the transport reaches a specified time position. This can be useful for causing something to happen—or for starting an entire process—at a particular instant during the transport's progress. A timepoint might, for example, even trigger a new time position value to be sent to the transport object itself, thus causing the transport to leap to a different time.

Polyphony requires multiple objects

Any given MSP patch cord represents a single channel of audio. If you want to generate or process multiple sounds or channels, you need to treat each sound or channel separately. For example, each sfplay~ object can have multiple loaded sound cues so that it's ready to play any one of several files, but it can only play one sound file at any given instant. And if it's a stereo file you need to treat each channel separately for mixing, processing, etc. This patch demonstrates that.

Random and urn

This patch demonstrates the two simplest objects for generating random numbers. Every time it receives a bang in its left inlet, the random object generates a random integer in the range from 0 to one less than its argument. (For example, if you tell it to generate one of 12 random numbers, it will choose a number from 0 through 11 inclusive.) Note that this includes the possibility that successive random choices may appear to generate what seem to be patterns, especially if it's choosing from among a small range of possibilities.