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Re: FM Synthesis for iOS
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Re: FM Synthesis for iOS


  • Subject: Re: FM Synthesis for iOS
  • From: Richard Dobson <email@hidden>
  • Date: Tue, 12 Mar 2013 10:28:02 +0000

On 12/03/2013 05:56, Patrick J. Collins wrote:
Hi everyone,

I am currently making an iPad/iPhone game, and I really want FM
synthesis for my sound effects.  I thought I could get away with using
STK and Momu, but it turns out the library is completely incompatible
with iOS devices; when I try setup two voices and attempt to play
polyphony, the entire app freezes.  I thought at first it was crashing
and could possibly debug it-- but it turns out it just slows down to the
point of not functioning at all...  However if I just use one voice,
then it works perfectly fine-- unfortunately, that's not an option for
my app.. I need multiple voices.


Have you set up the "Voicer" class to manage the polyphony? I found STK worked fine (pre Momu days) (v 4.4.2 onwards) when built as a static library without the STK audio classes, generating multiple voices algorithmically, and with whatever iOS THUMB mode was required to support floating-point (and using Apple's standard example code to convert to fixed-point or whatever output - been while since I looked at my code). Otherwise, it may be some issue between the GUI control and the audio engine. STK/Momu is (so we are told) the workhorse engine for all Smule's apps, and I am pretty sure they have some polyphonic ones, so I recommend perseverance!



Richard Dobson
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