zsh: Execute string with command and params

[kkjaergaard]

I want to do like this in zsh:

S=aacgain -r
$S audio.m4a

I get the error: zsh: command not found: -r

What I wanted to happen: aacgain -r audio.m4a

In human, I want to define the entire command including parameters. Later in the script, I just have to supply the filename.

Is this possible?

[Barrucadu]

Use an array:

S=(aacgain -r)
$S audio.m4a

Unlike bash, zsh doesn't split strings on spaces when used in a command.