Re: [fluid-dev] Percussion Channel

[Tom M.]

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On 10.12.20 15:10, dave@mozart.co.uk wrote:
> Hi Tom,
>
>
> > fluid_synth_set_channel_type() changes the type only. It does not assign new 
> > presets. To do this, either add a call to fluid_synth_program_reset() or send 
> > some fluid_synth_program_change() messages afterwards.
>
>  >And make sure to implement proper error handling by checking the return 
> values of those functions.
>
>
> Thanks for the suggestion.   I was already sending a program change to all 
> channels (except the one where I actually want percussion)  and the voices were 
> coming out fine on all but channel 9.   So I’ve included a reset:
>
>         settings = new_fluid_settings();
>
>         fluid_settings_setint( settings, "synth.midi-channels", 65 );
>
> // create the synthesizer
>
> // with percussion channel = 64
>
>         synth = new_fluid_synth( settings );
>
>         fluid_synth_set_channel_type( synth, 64, CHANNEL_TYPE_DRUM);
>
> // Set the standard MIDI percussion channel to melodic:
>
>         fluid_synth_set_channel_type( synth, 9, CHANNEL_TYPE_MELODIC);
>
> // Reset:
>
>         fluid_synth_system_reset( synth );
>
> And it hasn’t changed:  I’m still getting percussion sounds on channel 9.
>
> As a work-around I’ve gone over to using channel 9 as my percussion channel, 
> and that works fine.
>
> [I have to admit I wasn’t checking error returns but I’ll do that next.]
>
> Dave
>
> David Webber
> Mozart Music Software
> https://www.mozart.co.uk


I forgot that you have to set the bank as well:

fluid_synth_set_channel_type( synth, 9, CHANNEL_TYPE_MELODIC);
fluid_synth_bank_select(synth, 9, 0); // bank 0
fluid_synth_program_reset();

Alternatively, use fluid_synth_program_select() right away.


Tom