What's new in Csound 7

Csound 7 brings major changes which offer new possibilities for users and modernize coding. Nevertheless Csound 7 keeps backwards compatibility: Despite new syntax features any valid Csound code from the past can be run without any code change.

Explicit Variable Types

Variable names no longer have to start with i, k, a etc. to declare their data type implicitely. Instead any name (except existing opcodes or keywords) can be used, and the type declared explicitely:

maxamp@global:i = 0dbfs / 5

instr 1
  freq:i = 444
  ramp:k = linseg(maxamp,p3,0)
  sound:a = poscil(ramp,freq)
  outall(sound)
endin
schedule(1,0,2)

New UDO Syntax and Pass-by-reference

User Defined Opcodes now follow the syntax opcode name(inargs):(outargs).

opcode myop(inval:i):(i)
  xout(inval+1)
endop

opcode empty():void
  puts("empty!",1)
endop

instr 1
  print(myop(17))
  empty()
endin
schedule(1,0,0)

Give example for pass-by-reference ...

Removed Limitations for Functional Style

Multiple output arguments can now be used in functional style, e.g.

nchnls = 2
instr 1
  sig:a = rand(0dbfs/10)
  aL,aR = pan2(sig,3/4)
  out(aL,aR)
endin
schedule(1,0,1)

For-Loop

Is it going to happen??

User-Defined Types

struct MyType val0:i, val1:i

instr 1
testVal:MyType init 8, 88
print(testVal.val0)
print(testVal.val1)
endin
schedule(1,0,0)