Re: [fluid-dev] MIDI commands for reverb/chorus parameters

[Element Green]

Hello Ien,

No, the APIs work fine and so do the related shell commands for setting these parameters.  What I was clarifying is that there are no embedded MIDI commands (to my knowledge) for setting the reverb/chorus parameters (depth, frequency, etc) in a MIDI stream.  There aren't any MIDI standards for these things (to my knowledge), which is probably the main reason why this is missing.  Implementing something like what I was describing previously would require creating new interfaces, which have no standard definition, which would be specific to FluidSynth.

Best regards,

Element

On Fri, Jul 8, 2016 at 10:28 AM, Ien Cheng <address@hidden> wrote:

Hi Element -

I'm surprised to hear there isn't support for reverb/chorus settings. 

Does that mean e.g. reverb settings api call doesn't do anything by design at the moment? If so, is there any way (other than looking at the source) to tell from the API docs which APIs are actually implemented? 

Thanks, Ien

On Fri, Jul 8, 2016 at 11:45 AM, Element Green <address@hidden> wrote:

Hello,

FluidSynth follows the MIDI Tuning Standard in regards to SYSEX command data.  I'm not real familiar with this myself, but a quick search on the Internet for "MIDI Tuning Sysex" should bring up some useful info.

As far as setting chorus and reverb parameters parameters (beyond just the send value), there currently isn't anything in FluidSynth to support this.  I believe there has been talk in the past about adding FluidSynth specific Sysex or RPN commands for things like this.  It may be interesting to even add the ability to run arbitrary commands using Sysex and the usual FluidSynth shell syntax (just occurred to me while writing this).  Some thought about security is probably in order though.  I don't think there are any dangerous commands that could be embedded in a MIDI file at the moment (such as deleting files or what not - deserves some analysis), but if there were any bugs in this code, it may be possible for someone to craft data to exploit it.  At any rate, perhaps the option could be left disabled by default.

Best regards,

Element

On Thu, Jul 7, 2016 at 11:49 PM, jean-jacques.ceresa <address@hidden> wrote:

Hi, Ben
>How do I set the various FluidSynth parameters for reverb and chorus via MIDI commands, as opposed to putting them in a config file or via telnet?

As far i remember there is no specific CC in the MIDI specifications. Anyway, this should be done via MIDI sysex but actually I don't know if Fluidsynth have support.
The same remark is true for settings "Basic Channel"  from MIDI in the recent poly-mono patch. In this patch, this as not be implemented because of the lack of specification
knowledge about Fluidsynth sysex.
I remember that MIDI sysex has been used for "MIDI tunings". I wonder if someone know the specific sysex code relevant to Fluidsynth ?.

jjc

Le 08/07/2016 03:18, Ben Gonzales a écrit :

Hi all.

How do I set the various FluidSynth parameters for reverb and chorus via MIDI commands, as opposed to putting them in a config file or via telnet?

The parameters are things like room size, width , damping, speed, etc.

Ben

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