The Kyma Language for Sound Design, Version 4.5

To read several channels, create several MIDIVoices, each assigned to its own channel but reading the
same MIDI file, and place all of them into a Mixer:
By saving the controller movements in a MIDI file and reading them with the MIDIVoice, you can combine
the Sound and the means for controlling the Sound into one package — another manifestation of the
ubiquitous “sound object”!
Time Functions
Among the functions that the Kyma real-time evaluator can understand are functions that change over
time. Examples include !LocalTime whose value is simply the current time in seconds since the Sound
started playing, or repeatingRamp: which generates a ramp or sawtooth-shaped function that changes
linearly from 0 up to 1 and then repeats.
Suppose you had a GenericSource that was set to read a sample from RAM and that you wanted its frequency
to increase gradually over time. You could enter the following expression into the Frequency
parameter field:
4 c + !LocalTime nn
This would result in a sample whose pitch would increase continuously at the rate of one half step per
second. Alternatively, you might use something like
(!KeyDown ramp: 0.1 s) * 3 nn + !Pitch
This would give you the pitch from the keyboard plus a pitch bend from zero to three half steps over the
course of a tenth of a second. Or, if you didn’t want to rely on any keyboard input at all, you could use
something like
(1 repeatingRamp: 3 s) * 440 hz + 440 hz
which would result in a frequency that would glide from 440 hz up an octave to 880 hz over the course
of three seconds, and then repeat the process over and over for the duration of the Sound.
To trigger a Sound periodically, you can use the bpm: (beats-per-minute) function. For example, if you
put the following into the Trigger field of the GenericSource:
1 bpm: 60
it would be triggered once per second. To effectively “loop” a disk file that is 3.5 seconds in duration, you
could type the following into the Trigger field:
1 bpm: (60 / 3.5)
This would trigger the disk playback once every 3.5 seconds.
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