Re: [fluid-dev] Fluidsynth reverb settings

[Pedro Lopez-Cabanillas]

On Thursday 17 March 2011, S. Christian Collins wrote:
> I don't know if this helps, but these are the reverb values I use for 
> Fluidsynth and I am quite happy with the sound.  Now, I have set these 
> values in Qsynth, so I am not sure if the numbers are different in 
> Fluidsynth:

The corresponding values in FluidSynth commands are a bit different. 
The scale in QSynth is 100:1, except Width that is 1:1
Here are the limits in FluidSynth:

* @param roomsize Reverb room size value (0.0-1.2)
* @param damping Reverb damping value (0.0-1.0)
* @param width Reverb width value (0.0-100.0)
* @param level Reverb level value (0.0-1.0)

There are also 5 presets (rev_preset 0-4):
  /* name */    /* roomsize */ /* damp */ /* width */ /* level */
  { "Test 1",          0.2f,      0.0f,       0.5f,       0.9f },
  { "Test 2",          0.4f,      0.2f,       0.5f,       0.8f },
  { "Test 3",          0.6f,      0.4f,       0.5f,       0.7f },
  { "Test 4",          0.8f,      0.7f,       0.5f,       0.6f },
  { "Test 5",          0.8f,      1.0f,       0.5f,       0.5f },

So, the following values for QSynth:
> Room: 65
> Damp: 18
> Width: 76
> Level: 75

Are equivalent to these FluidSynth commands:
rev_setroomsize 0.65
rev_setdamp     0.18
rev_setwidth    76.0
rev_setlevel    0.75

>  From there, you can adjust the room level to the size of the room you 
> desire.  65 gives a hall effect, 75 a large hall, and 89 a really 
> spacious hall.  Of course, to really hear the effect, you will need to 
> adjust CC 91 to increase the reverb for each MIDI channel.  Some presets 
> may incite a bit of reverb already even if CC 91 is set to 0, depending 
> on how the preset is programmed inside the SoundFont bank.

Regards,
Pedro