Re: [fluid-dev] How to change settings (Reverb, Chorus, Gain, Bank) while Fluidsynth is running as a server (no shell)?

[Graham Goode]

All of these things can be controlled via MIDI messages, so why don't you use the amidi command line app to script the messages, and just develop your little app to take input from your GPIOs and fire those scripts?

On Sunday, August 11, 2013, address@hidden  wrote:
> Hello everyone,
>
> first of all: a BIG, BIG THANK YOU to everyone here for Fluidsynth.
> It's a wonderful application, I
> like and use it a lot!
>
> I'm running Fluidsynth 1.1.6 on a small Arm board running Linux (something
> like a Cubieboard.
> Say a RaspPi on steroids).
> I recompiled everything to gain as much performances as possible, and
> am really happy about
> it (175 MB of SF2, 128 voices, 21ms latency and
> hardly breaks a sweat!).
>
> My question. hoping not to waste too much of
> your time.
>
> I'm running Fluidsynth in unattended Server mode ( -s ): the ARM board
> is headless and connected to a MIDI
> input (master keyboard and/or
> sequencer).
>
> I'd like to change some Fluidsynth settings "on the fly":
>
> - without
> resorting to the integrated shell (because I can't use it: headerless
> board without keypad)
> - without having to send
> MIDI commands using my MIDI keyboard (because it's very
> complicated with my model)
> - without restarting Fluidsynth
>
> In
> particular, I'd like to change:
> gain (-g)
> reverb (-R)
> chorus (-C)
> General MIDI bank
>
> So I was thinking of a shell
> script or C program I may write,
> triggered by an appropriate physical input (I can do that, I have
> plenty GPIOs on the
> board).
> The program/script should "talk" to Fluidsynth server and change some
> settings in realtime, without restarting
> it (a brief pause is OK).
>
> I've read the documentation, and from what I gather, it should be somehow possible using
> Fluidsynth API via libfluidsynth.
> But every example I've found creates a new Synth before setting parameters, etc.
> I
> don't want to create a new synth: I only want to change the settings of the Fluidsynth server which is already running.
>
>
> Is it possible?
> Any hint, code fragment...?
>
> Thanks a lot for your patience. :-)
>
> Best regards,
>
> Fernando
>
>
> Invita i tuoi amici e Tiscali ti premia! Il consiglio di un amico vale più di uno spot in TV. Per ogni nuovo abbonato 30 € di premio per te e per lui! Un amico al mese e parli e navighi sempre gratis: http://freelosophy.tiscali.it/
>
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