There are three formats for a Midifile.
>From the official spec:

Format 0 simply presents all data in sequence - a single multi-channel track.
Format 1 contains one or more simultaneous tracks.
Format 2 contains one or more sequentially-independent single-track patterns.

Csound will only deal with Format 0 at present. Hopefully your sequencer can
make a conversion for you.


Richard Dobson

David Schuyeteneer wrote:
> 
> I use -F to use a midifile as melodyinput, but Csound says :
> 
> midifile format 1 not supported
> 
> What's wrong ?
>