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Re: [fluid-dev] Trouble building/using fluidsynth

From: Marcus Weseloh
Subject: Re: [fluid-dev] Trouble building/using fluidsynth
Date: Mon, 24 Dec 2018 01:08:43 +0100

Hi Justin,

you probably compiled Fluidsynth without libsndfile support, so the resulting audio is a raw 16-bit signed dual-channel float audio file (so not a .wav file with proper headers). You can either convert this raw file to wav using some tool, or install libsndfile-dev (or whatever it's called in your distribution) before building fluidsynth.



Am So., 23. Dez. 2018 um 23:34 Uhr schrieb Justin <address@hidden>:
Hello, I'm trying to compile a fluidsynth binary. For my application, I need a way to convert from midi to mp3 on an AWS lambda, and I thought that using fluidsynth would be the best way. These are the steps I took:

  1. Clone fluidsynth from here: https://github.com/FluidSynth/fluidsynth
  2. Created build directory and ran 'cmake ..' from build directory
  3. Ran 'make fluidsynth' from build directory. This seemed to create a binary file called 'fluidsynth' in build/src directory
  4. Downloaded a sound font file from https://github.com/urish/cinto/blob/master/media/FluidR3%20GM.sf2 (renamed to sf.sf2 for convenience

Running the binary gave the following output:

fluidsynth -ni sf.sf2 some_midi.mid -F output.wav -r 44100

FluidSynth runtime version 2.0.2

Copyright (C) 2000-2018 Peter Hanappe and others.

Distributed under the LGPL license.

SoundFont(R) is a registered trademark of E-mu Systems, Inc.

Rendering audio to file 'output.wav'..

However, when I tried to play the output.wav file that was generated, it just gave a short loud click/pop.

I'm not sure what I'm doing wrong. Could someone give me some advice for how to figure out how to get this working? Or is there a better way for me to get fluidsynth to work on AWS lambda?



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