Re: [fluid-dev] fluid-dev Digest, Vol 213, Issue 5

[Muziker Mammoth]

These are the set of commands i feed into fluidsynth to startup

resetbasicchannels
load /usr/share/sounds/sf2/FluidR3_GM.sf2

setbasicchannels 0 0 1
setbasicchannels 1 0 1

...

setbasicchannels 14 0 1
setbasicchannels 15 0 1

select 0 1 0 0
select 1 1 0 0

...

select 14 1 0 0
select 15 1 0 0

pitch_bend_range 0 255
pitch_bend_range 1 255

...

pitch_bend_range 15 255

> If you use a noteon command on channel 0 and channel 1 using the same velocity value you should hear that the note on both channels have the same level.

The notes on the channels have differing levels, alternating between loud and soft.

> It also plays two notes even though only one gets sent.

I cannot get it to do this again. so ignore this bit.

> At fluidsynth initialization, the default value for pitch bend sensitivity is +/- 2 semitones.

when i resetbasicchannels, it probably altered the default pitch bend sensitivity. But now i've set it explicitly with the pitch_bend_range 255, and works fine.

So i'm not sure why fluidsynth has differernt audio levels, maybe it's the midi modes, but i've tried them and it still functions the same way.

mmmoth

On Sun, Apr 25, 2021 at 12:00 AM <fluid-dev-request@nongnu.org> wrote:

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Today's Topics:

   1. Re: [ fluid-dev ] How to set up mpe like behaviour?
      (Ceresa Jean-Jacques)


----------------------------------------------------------------------

Message: 1
Date: Fri, 23 Apr 2021 21:26:11 +0200 (CEST)
From: Ceresa Jean-Jacques <jean-jacques.ceresa@orange.fr>
To: FluidSynthmailinglist <fluid-dev@nongnu.org>
Subject: Re: [fluid-dev] [ fluid-dev ] How to set up mpe like
        behaviour?
Message-ID: <1387205342.5075.1619205971398.JavaMail.www@wwinf1d15>
Content-Type: text/plain; charset="utf-8"

>when fluidsynth receives midi notes on even channels, the audio is louder than on odd channels

No. After starting fluidsynth console application, and assuming the same instrument (i.e a piano) is set on channel 0 and channel 1. If you use a noteon command on channel 0 and channel 1 using the same velocity value you should hear that the note on both channels have the same level.

 

>It also plays two notes even though only one gets sent.

No. After execution of only one noteon command on channel 0, you should hear that only one note is played on this channel 0.

 

>I felt if the channel was in monophonic mode with omni off or some other combination, that might help.

No. You need only to set a channel in monophonic only because you want this channel behave like a monophonic instrument. On fluidsynth initialization the default mode for all MIDI channels is polyphonic mode.

 

>As an addendum, the reason it seemed like pitch bend was being ignored, was the pitch_bend_range wasn't set.

At fluidsynth initialization, the default value for pitch bend sensitivity is +/- 2 semitones. It is likely that for any 'mpe like implementation' one should need custom pitch bend sensitivity value for each relevant MIDI channels.

jjc

 
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