synthImprov Examples: loop2

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Source code:

loop2.cpp

loop2 is a polyphonic version of the loop1 drum sequencer. There are 9 instruments which can played by pressing the computer keyboard characters "1" through "9" which play various General MIDI percussion instruments on MIDI channel 10 (offset 1). The default instruments are:

            1 LOW_TOM           6 MUTE_CUICA     
            2 LOW_MID_TOM       7 OPEN_CUICA      
            3 HIGH_MID_TOM      8 MUTE_TRIANGLE    
            4 HIGH_TOM          9 ACOUSTIC_BASS_DRUM
            5 HI_BONGO          0 REST  

The primary implementation for the loop2 program is similar to the loop1 program but there are nine parallel arrays instead of one array.

Note that in this program attack-velocity control is possible. All instruments are played at the attack velocity specified in the performance array.

In the loop program, you can save or load three patterns from a text files called "loop1.txt", "loop2.txt", and "loop3.txt".

Here are some rhythmic patterns which can be loaded into the loop.exe program (after renaming them "loop[123].txt")

• loop1.txt
• loop2.txt
• loop3.txt

The syntax for loop files is as follows:

Comment:

everything to the end of the line will be printed out as the file is loaded into the loop2 program.



Beats:

sets the following number to be the number of beats in the loop.



Subdivisions:

set the following number to be the number of subdivisions in each beat.



Tempo:

set the following number to be the number of beats per minute.



Instrument:

the following number is the instrument number (in the range from 1 to 9). The next number is the MIDI key number for the rhythm instrument (in the range from 1 to 127). Next comes the array of attack velocities for the loop. The velocity list can be on any number of lines but must consists of beats * subdivisions elements. Also note that once one instrument is defined, the Beats: and Subdivisions: commands can no longer appear in the text file. Instruments can be defined in any order for the computer keyboard buttons "1" through "9".