If there is only a small selection of frequencies and durations your app need to play, you can pre-record them as audio files and play them back when required.
If it’s something like an instrument or requires procedurally-generated audio, you may want to package the sound effect you want into a Core Audio virtual instrument and procedurally generate a MIDI sequence. Those options allows you to fine-tune (no pun intended) the tune using some DAW like GarageBand. The latter will not only allow your app to use the tunes, but also Core Audio-compatible DAWs like Logic Pro X or GarageBand, and you can make ads of your app with music generated with the same software instrument but professionally written and mastered. > On Sep 24, 2015, at 12:33, Jens Alfke <j...@mooseyard.com> wrote: > > >> On Sep 23, 2015, at 9:05 PM, dangerwillrobinsondan...@gmail.com wrote: >> >> There is also AVAudioEngine added in Yosemite. >> It's a higher level Objective-C API around Core Audio. >> The docs still kind of don't tell you much and at times the API makes more >> sense if you know a little about Core Audio but the friction is a lot less C >> level. > > Nice! I hadn’t heard of this before. It looks equivalent to the AUGraph API > but much easier to use. > > Rags, if you want to generate and play waveforms, it looks like you’d create > an AVAudioPCMBuffer, fill it with audio samples (like series of 0, 0, 0, 1, > 1, 1, … for a square wave), then connect that to an AVAudioPlayerNode and > that to an AVAudioMixerNode. > >> The truth is there's a lot you do need to know to do audio. Just like video >> or databases or networking or almost anything. > > I’ve found audio to be one of the hardest areas to program to, partly because > the data formats are complex and partly because a lot of stuff needs to run > in real-time, but mostly because the APIs have been very difficult to use. > Apple’s been doing a great job with AVFoundation; I just hope they find the > time to document the newer parts properly. > > —Jens > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/max%40maxchan.info > > This email sent to m...@maxchan.info
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