There are plenty here who know more than I do, but here's my understanding:
the doc says that, for file-driven performance, the instrument defaults to
MIDI channel + 1.  Obviously there is no MIDI channel 0, so instr 1 is only
being triggered by the score, not the MIDI file.  Maybe you need to have
instr 2 call instr 18 and 19, if you want MIDI channel 1 to trigger two
instruments?

-Chuckk

On 11/1/07, Rory Walsh <rorywalsh@ear.ie> wrote:
>
> I'm trying to play two instruments with data from one midi file but I
> can't manage it. Should the following csd not do the trick or am I just
> having a bad day??
>
> <CsoundSynthesizer>
> <CsOptions>
> -odevaudio -F bach.mid  -m0d
> </CsOptions>
> <CsInstruments>
> sr = 44100
> kr = 44100
> ksmps = 1
> nchnls = 1
>
> instr 1
>          kcps init 0
>          kvelocity init 0
>          midinoteoncps kcps, kvelocity
>          a1 oscili 1000, kcps, 1
>          out a1
> endin
>
> instr 2
>          kcps init 0
>          kvelocity init 0
>          midinoteoncps kcps, kvelocity
>          a1 oscili 1000, kcps*2, 1
>          out a1
> endin
>
>
> </CsInstruments>
> <CsScore>
> f1 0 1024 10 1
> i1 0 100
> i2 0 100
> </CsScore>
> </CsoundSynthesizer>
>
>


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