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tempoval

Reads the current value of the tempo.

Syntax

kres tempoval

Performance

kres -- the value of the tempo. If you use a positive value with the -t command-line flag, tempoval returns the percentage increase/decrease from the original tempo of 60 beats per minute. If you do not, its value will be 60 (for 60 beats per minute).

Examples

Here is an example of the tempoval opcode. Remember, it only works if you use the -t flag with Csound. It uses the file tempoval.csd.

Example of the tempoval opcode.
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<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
; Audio out   Audio in
-odac           -iadc    -t60 ;;;RT audio I/O
; For Non-realtime ouput leave only the line below:
; -o tempoval.wav -W -t60 ;;; for file output any platform
</CsOptions>
<CsInstruments>

; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1

; Instrument #1.
instr 1
  ; Adjust the tempo to 120 beats per minute.
  tempo 120, 60

  ; Get the tempo value.
  kval tempoval

  printks "kval = %f\\n", 0.1, kval
endin


</CsInstruments>
<CsScore>

; Play Instrument #1 for one second.
i 1 0 1
e


</CsScore>
</CsoundSynthesizer>

Since 120 beats per minute is a 50% increase over the original 60 beats per minute, its output should include lines like:

kval = 0.500000

See also

Sensing and Control: Tempo and Sequencing

Credits

Example written by Kevin Conder.

New in version 4.15

December 2002. Thanks to Drake Wilson for pointing out unclear documentation.