Re: Coreaudio-api Digest, Vol 15, Issue 101
Re: Coreaudio-api Digest, Vol 15, Issue 101
- Subject: Re: Coreaudio-api Digest, Vol 15, Issue 101
- From: George Litterst <email@hidden>
- Date: Sat, 24 Nov 2018 20:57:54 -0500
Thank you very much for the reply, Douglas.
I checked with the programmer and now realize that I made an error in what I
wrote. To create a 16-channel GM synth, we currently use
kAudioUnitSubType_Sampler, which is a mono-timbral. We create 16 instances of
kAudioUnitSubType_Sampler in parallel to form the GM synth.
Does this sound like the best approach?
Does kAudioUnitSubType_Sampler support all of the features of the SoundFont
spec?
Thanks, in advance.
George
> On Nov 24, 2018, at 3:00 PM, email@hidden wrote:
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> 1. Re: kAudioUnitSubType_DLSSynth and support for SoundFont
> 2.0.1 features (email@hidden)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 24 Nov 2018 08:18:44 -0800
> From: "email@hidden" <email@hidden>
> To: George Litterst <email@hidden>
> Cc: email@hidden
> Subject: Re: kAudioUnitSubType_DLSSynth and support for SoundFont
> 2.0.1 features
> Message-ID: <email@hidden>
> Content-Type: text/plain; charset="utf-8"
>
> Hi George!
>
> kAudioUnitSubType_DLSSynth is very old and has never been supported in iOS.
> You will want to use kAudioUnitSubType_MIDISynth which is supported on both
> iOS and OS X. The underlying synth engine for this type is very close to
> fully SoundFont-compatible. Unfortunately we do not have any documents which
> describe any missing features, if any. Everything you list below is
> supported. Please file radars if you find problems.
>
> -DS
>
>
>> On Nov 18, 2018, at 7:50 AM, George Litterst <email@hidden> wrote:
>>
>> I have both Mac and iOS applications that load a custom SoundFont into
>> kAudioUnitSubType_DLSSynth. These apps receive MIDI data and pass on the
>> data to the DLSSynth. This basic scenario works great in our applications.
>>
>> We are about to embark on enhancements to our SoundFont based on the
>> parameters defined for SoundFonts in the 2.01 specification (the final
>> SoundFont spec from Creative Labs).
>>
>> Can anyone provide a comprehensive list of SoundFont features that are or
>> are not supported by kAudioUnitSubType_DLSSynth in the Mac and iOS
>> environments?
>>
>> In particular we plan to improve the realism of various instruments by
>> defining the parameters for the SoundFont's “modulators.” These modulators
>> enable different types of MIDI input (key velocity, key number, continuous
>> controllers, etc.) to control any number of synth parameters. By tweaking
>> these modulator parameters for each instrument in the SoundFont, we can
>> specify—in theory—the way in which a low-pass filter adjusts the timbre of
>> an instrument based on velocity, map the mod wheel to control filter cutoff,
>> crossfade samples, and so forth.
>>
>> Of course it would be a delight to learn that kAudioUnitSubType_DLSSynth
>> supports the complete spec.
>>
>> Thanks,
>> George Litterst
>> TimeWarp Technologies
>
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