Here is an example with score statements, `bash' and external.

<CsoundSynthesizer>
<CsInstruments>

sr     = 44100
ksmps  = 1
nchnls = 1
0dbfs  = 1

instr 1
  kamp expon ampdb(p5), p3, 0.001
  aosc poscil3 kamp, p4, 2
  aw1  poscil3 1, 1/p3, 1 
  acnv dconv aw1, 64, 3
  aout dcblock2 aw1 + acnv*0.002
  aout butlp aout + aosc, 12000
  out  aout*0.3
endin

</CsInstruments>
<CsScore bin="bash">

# redirect stdout to score file
exec > "$1"

# shortcuts for the used score statements
f() { echo "f $@"; }
i() { echo "i $@"; }

TEMPO="t"
BPM=""
fsize=8192

# usage: tempo at bpm
tempo()
{
    if [ -n "$BPM" ]; then
        TEMPO="$TEMPO $1 $BPM $1 $2"
    else
        TEMPO="$TEMPO $1 $2"
    fi
    BPM=$2
}

# waveform from score file
f 1 0 256 1 \"$1\" 0 1 0

# usage: ftable at name
ftable()
{
    if [[ "$2" == "sine" ]]; then
        f 2 $1 $fsize 10 1
    else
        f 2 $1 $fsize 10 5 4 3 2 1
    fi
}

tempo 0 30

ftable  0    blabla
ftable  6.4  sine

f 3 0 $fsize 11 10 1 .75

# normal i-statement
i 1 0 1 880 -12

# usage: arpeggio at dur freq amp
arpeggio()
{
    i 1  $1  $2  $3           $4
    i 1   +   .  [$3 \* 5/4]   .
    i 1   +   .  [$3 \* 1.5]   .
    i 1   +   .  [$3 \* 7/4]   .
    i 1   +   .  [$3 \* 12/5]  .
}

arpeggio 0    0.5   440   -8
arpeggio 2.5  0.25  1216  -9
arpeggio 4.6  0.29  700    .

tempo 4 135
tempo 7 30

for i in 0.11 0.27 0.56 0.79; do
    frq=`echo "377 * (1 + $i)"|bc -l`
    arpeggio "[2.6 + $i]"  $i  $frq  -9
done

i 1 4   3  4777  -12
i 1 4.8 3  6666  -9

# usage: bass at [skip]
bass()
{
    i 1  $1  1   75   -7
    i 1   +  .   44    .

    if [ -z "$2" ]; then
        i 1   +  .   33  -12
        i 1   +  .   66   -8
    fi
}

bass 0
bass 4 skip_tail

# external
python <<EOF
for istmt in [(0, 4, 100, -9), (4, 2, 103, -13), (4, 3, 106, -11)]:
  print "i1 %f %f %f %d" % istmt
EOF

echo "$TEMPO"

</CsScore>
</CsoundSynthesizer>

tito