readclock — Reads the value of an internal clock.
inum -- the number of a clock. There are 32 clocks numbered 0 through 31. All other values are mapped to clock number 32.
ir -- value at i-time, of the clock specified by inum
Between a clockon and a clockoff opcode, the CPU time used is accumulated in the clock. The precision is machine dependent but is the millisecond range on UNIX and Windows systems. The readclock opcde reads the current value of a clock at initialization time.
Here is an example of the readclock opcode. It uses the file readclock.csd.
Example 741. Example of the readclock opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o readclock.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; Initialize the global variables. sr = 44100 kr = 44100 ksmps = 1 nchnls = 1 ; Instrument #1. instr 1 ; Start clock #1. clockon 1 ; Do something that keeps Csound busy. a1 oscili 10000, 440, 1 out a1 ; Stop clock #1. clockoff 1 ; Print the time accumulated in clock #1. i1 readclock 1 print i1 endin </CsInstruments> <CsScore> ; Initialize the function tables. ; Table 1: an ordinary sine wave. f 1 0 32768 10 1 ; Play Instrument #1 for one second starting at 0:00. i 1 0 1 ; Play Instrument #1 for one second starting at 0:01. i 1 1 1 ; Play Instrument #1 for one second starting at 0:02. i 1 2 1 e </CsScore> </CsoundSynthesizer>
Its output should include lines like this:
instr 1: i1 = 0.000
instr 1: i1 = 90.000
instr 1: i1 = 180.000