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Re: [fluid-dev] coreaudio driver bug

From: Victor . Lazzarini
Subject: Re: [fluid-dev] coreaudio driver bug
Date: Fri, 24 Sep 2010 19:24:57 +0100
The midifile is fine, it plays everywhere. It even plays in fluidsynth with portaudio and jack drivers.
Did you listen to the file I posted? That is a recording of fluidsynth running with coreaudio, and then with
portaudio. It is heavily distorted with coreaudio, but fine with portaudio.

What I am saying is that this is regardless of the midi file. All midifiles I tested and also realtime MIDI input exhibit the same behaviour. So I can only conclude that there is something wrong with fluidsynth's coreaudio backend.

Regards

Victor

----- Original Message -----
From: Ebrahim Mayat <address@hidden>
Date: Friday, September 24, 2010 6:40 pm
Subject: Re: [fluid-dev] coreaudio driver bug
To: Victor Lazzarini <address@hidden>
Cc: address@hidden

>

> On Sep 24, 2010, at 6:16 AM, Victor Lazzarini wrote:
>
> Hi everyone,

> I have installed version 1.1.12 and yes, the preset-reset is not there anymore, thanks. It works fine now. 
>
> Glad to hear that!
>
> Except for the coreaudio driver.
>
> Here is the description of the bug:
>
> 1. with this command-line
>
> ./fluidsynth -a coreaudio -n [...]
>
> the output is not right and there is significant distortion, which appears to be sample-format related.
>
> 2. a comparable command-line with portaudio
>
> ./fluidsynth -a portaudio -n [...]
>
> works fine.
>
> This is on OSX 10.5, MacBook Pro 2.8 GHz Intel duo core. A soundfile example with the output can be found in
>
>
> Fluidsynth using Coreaudio renders the various MIDI files that I have tested without any distortion.
>
> Have you tried to render your MIDI file using other software on OS X ?
>
> Note that fluidsynth renders MIDI files even with the "-n" switch. 
>
> $ fluidsynth -a coreaudio -F ~/Desktop/File.wav  -n soundfont.sf2 midifile.mid
> FluidSynth version 1.1.2
> Copyright (C) 2000-2009 Peter Hanappe and others.
> Distributed under the LGPL license.
> SoundFont(R) is a registered trademark of E-mu Systems, Inc.
>
> Rendering audio to file '~/Desktop/File.wav'..
>
> E
>



Dr Victor Lazzarini, Senior Lecturer, Dept. of Music,
National University of Ireland, Maynooth
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