An instrument block is comprised of ordinary statements that set values, control the logical flow, or invoke the various signal processing subroutines that lead to audio output. Statements that define an instrument block are:

An instrument block looks like this:

    instr 1   ;A simple sine wave oscillator
aout  oscils  10000, 440, 0
out   aout
    endin

Statements that define a user defined opcode (UDO) block are

See the UDO section for more information.