> On May 28, 2016, at 8:24 PM, Graham Cox <graham....@bigpond.com> wrote: > > I’m looking for general pointers to the simplest/quickest way to generate an > audio tone (sine wave) of a given frequency and duration. Most of the audio > APIs seem concerned with playing samples rather than generating tones, so > it’s not immediately obvious where to look.
It’s easy to generate a sample buffer of a sine wave. Allocate an array of uint16_t, and fill in each sample by scaling such that -1 ⟶ 0 and 1 ⟶ 255. Then tell whatever API you’re using that it’s a 1-channel 16-bit PCM buffer. Choose whatever sample rate you want to make it come out the right frequency; it’ll do the interpolation for you. —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/archive%40mail-archive.com This email sent to arch...@mail-archive.com
