On 16/12/2009, at 1:01 PM, Chunk 1978 wrote: > in OpenAL a normal sound file with no pitch has a value of > 1.0, one octave above the normal sound the pitch shifts up to 2.0, but > one octave below the normal sound the pitch shifts down to 0.5, not > 0.0 as i had expected! > > any thoughts on how i can solve this kind of problem?
Set the slider's minimum value to 0.5? One octave is a factor of two - going up doubles the pitch (frequency), going down halves it. If you multiplied the frequency by 0.0 it would become 0, not half its original value. If you want the slider to operate as a linear control with 1.0 in the centre, you'll have to apply an offset and scale factor to its value externally to get the geometric range change needed. --Graham _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
