Tutorials and Topics - Peabody Computer Music

Tutorial 20MIDI Control:SamplerPlaying samples with MIDI• Turn audio on and set the “Output Level” number box to a comfortable listening level.Play a slow chromatic scale on the MIDI keyboard to hear the different samples andtheir arrangement on the keyboard.To arrange a unified single instrument sound across the whole keyboard, each key regionshould contain a sample of a note from the same source. In this case, though, the samplesare arranged on the keyboard in such a way as to make available a full “band” consistingof drums, bass, and keyboard. This sort of multi-timbral keyboard layout is useful forsimple keyboard splits (such as bass in the left hand and piano in the right hand) or, as inthis case, for accessing several different sounds on a single MIDI channel with asequencer.• For an example of how a multi-timbral sample layout can be used by a sequencer,click on the toggle marked “Play Sequence”. Click on it again when you want to stopthe sequence. Turn audio off. Double-click on the p sequence object to open the Patcherwindow of the subpatch.The p sequence subpatchThe seq sampleseq.midi object contains a pre-recorded MIDI file. The midiparse object sendsthe MIDI key number and velocity to poly in the main patch. Each time the sequencefinishes playing, a bang is sent out the right outlet of seq; the bang is used to restart the seqimmediately, to play the sequence as a continuous loop. When the sequence is stopped bythe user, a bang is sent to midiflush to turn off any notes currently being played.• When you have finished with this patch, don’t forget to open the DSP Status windowand restore the Sampling Rate to its original setting.167