ex2D02. Live Input

# ex2D02.py
# Live Input

from moduleCsound import *

add(startSyn)

add(startOpt)
add("-iadc -odac -B512 -b128")
add(stopOpt)

add(startIns)

header(ksmps=32)

add("""
instr 1
aIn       inch      1   ;take input from channel 1
kInLev    downsamp  aIn ;convert audio input to control signal
          printk    .2, abs(kInLev)
;make modulator frequency oscillate 200 to 1000 Hz
kModFreq  poscil    400, 1/2
kModFreq  =         kModFreq+600
aMod      poscil    1, kModFreq ;modulator signal
aRM       =         aIn * aMod ;ring modulation
          outch     1, aRM, 2, aRM ;output to channel 1 and 2
endin
""")

tags(2)

add("i 1 0 3600")
tags(3)

writeRun(__file__, False)

ex2D01. Get Device List

# ex2D01.py
# Get Device List

from moduleCsound import *

add(startSyn)

add(startOpt)
add("-iadc999 -odac999")
add(stopOpt)

add(startIns)

header(ksmps=32)

add("""
instr 1
endin
""")

tags(2)

tags(3)

writeRun(__file__, False)

ex2C03. Midi All In

# ex2C03.py
# Midi All In

from moduleCsound import *

add(startSyn)

add(startOpt)
add("-+rtmidi=virtual -Ma -odac")
add(stopOpt)

add(startIns)

header(ksmps=32)

add("""
instr 1
kStatus, kChan, kData1, kData2 midiin

if kStatus != 0 then ;print if any new MIDI message has been received
    printk 0, kStatus
    printk 0, kChan
    printk 0, kData1
    printk 0, kData2
endif

endin
""")

tags(2)

add("i1 0 3600")

tags(3)

writeRun(__file__, False)

ex2C02. Midi Controller In

# ex2C02.py
# Midi Controller In

from moduleCsound import *

add(startSyn)

add(startOpt)
add("-+rtmidi=virtual -M1 -odac")
add(stopOpt)

add(startIns)

header(ksmps=32)

add("""
instr 1
; --- receive controller number 1 on channel 1 and scale from 220 to 440
kFreq ctrl7  1, 1, 220, 440
; --- use this value as varying frequency for a sine wave
aOut  poscil 0.2, kFreq
      outs   aOut, aOut
endin
""")

tags(2)

add("i 1 0 60")

tags(3)

writeRun(__file__, False)

ex2C01. Midi Keyboard In

A MIDI Keyboard can be read acting as score for instrument 1. Note I have changed writeRun to change run parameter to False. This will only create csound .csd file.

# ex2C01.py
# Midi Keyboard In

from moduleCsound import *

add(startSyn)

add(startOpt)
add("-+rtmidi=portmidi -Ma -odac")
add(stopOpt)

add(startIns)

header(ksmps=32)

add("massign   0, 1 ;assign all MIDI channels to instrument 1")

add("""
instr 1
iCps    cpsmidi   ;get the frequency from the key pressed
iAmp    ampmidi   0dbfs * 0.3 ;get the amplitude
aOut    poscil    iAmp, iCps ;generate a sine tone
        outs      aOut, aOut ;write it to the output
endin
""")

tags(2)

tags(3)

writeRun(__file__, False)

ex2B01. Document Structure

# ex2B01.py
# Document Structure

from moduleCsound import *

tags(1)

header(ksmps=32, nch=1)

# --- instrument (440 Hz sig of 1 sec dur at 0.25 amp)

add("""
instr 1 ; a 440 Hz Sine Wave
aSin      poscil    0dbfs/4, 440
          out       aSin
endin
""")

tags(2)

add("i 1 0 1")

tags(3)

writeRun(__file__)

Output: (spectrograph view with setting of 8192 points, Blackmann-Harris window, and showing frequencies from 0 to 1000.

The reason for the lines at end is because it can not determine frequency there.

ex2A02. Hello Cabbage

This example requires the csound frontend called Cabbage be installed.

# ex2A02.py
# Hello Cabbage

from moduleCsound import *

add("""
<Cabbage>
form size(420,100)
keyboard bounds(10,10,300,80)
rslider bounds(325,15,80,80), channel("level"), text("Level"), range(0,1,0.3)
</Cabbage>
""")

tags(1)

header(ksmps=32)

# --- instrument

add("""
instr    1
 icps cpsmidi
 klev chnget  "level"
 a1   poscil klev*0.2,icps
      outs   a1,a1
endin
""")

add(stopIns, stopSyn)

writeRun(__file__)