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Re: [fluid-dev] Supported Wave/Flac format other than SF2

From: Garth Hjelte
Subject: Re: [fluid-dev] Supported Wave/Flac format other than SF2
Date: Thu, 05 Feb 2015 12:24:34 -0800

At 11:37 AM 2/5/2015, you wrote:

>Hi and thanks for chiming in - as you very likely know, all formats have 
>their own quirks and ways of transforming the sample according to 
>various rules, so SFZ/DLS/Gigasampler/etc support would require certain 
>additions and changes to the playback core. Simply adding a dependency 
>to libInstPatch does not seem to be sufficient - as other formats 
>wouldn't exactly map 1:1 to SF2, we would be something that plays SF2 
>really well (like today) but other formats slightly wrong.

Actually (and I have the world expertise on this) most formats are eerily 
similar. It's not as different as you might be implying, in fact it's almost 
identical. PCM sample, volume, pan, tune, bits, sample rate, channels, loop 
on/off, loopstart, loopend, root key, keytrack. MAYBE amplitude envelope.

The solution is really as simple as taking in the core parameters (see above) 
and transferring it in. You don't have to guarantee perfect results; merely 
getting it in is much more advantageous.

My thought is if there is a consideration of putting another instrument format 
to be read within the core FluidSynth, I would recommend SFZ only for the fact 
that people can write their own SFZ files very simply. FS would only take a 
subset of the opcodes as authoritative, which is actually all FS would ever 
need. The advantage is making FS a bit more open as far as input goes.  

Garth Hjelte
Sampler User

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