Re: how to change pitch in real time
Re: how to change pitch in real time
- Subject: Re: how to change pitch in real time
- From: tahome izwah <email@hidden>
- Date: Thu, 13 Jan 2011 10:43:03 +0100
Brian, isn't MixerHost an iOS example project? AUTimePitch was MacOS X
only last time I checked.
On a personal note, I'd go with Dirac: most versatile, pretty fast and
available on all OSs. Best of all, it's totally free if you don't need
the PRO features: http://dirac.dspdimension.com
--th
2011/1/13 Brian Willoughby <email@hidden>:
>
> On Jan 13, 2011, at 00:38, Akram Ahmad wrote:
>>
>> I want to change the pitch during playback of an audio file using a "pitch
>> slider". Actually, My app has an view with two sliders namely Pitch and
>> Tempo. I want to change the pitch and tempo when audio is playing.
>>
>> Could you please help me with some code snippet?
>>
>> I have already gone through with MixerHost sample code on apple site to
>> play the audio file but not able to change the pitch during playback.
>
> I have not looked at the MixerHost sample, but if it uses AUGraph and
> AudioUnits, then it would be very easy to add pitch changes.
>
> AUVarispeed will change pitch and tempo together, like a physical tape deck.
> Just hook up the PlaybackRate parameter to your slider (and update the
> other slider to match).
> AUTimePitch allows changing of playback rate independently from pitch, using
> a pair of parameters.
>
> Both of these AudioUnits are from Apple, and are included for free with
> CoreAudio. On my ancient PowerPC machine, they only use about 3% to 6% of
> the CPU.
>
> Brian Willoughby
> Sound Consulting
>
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden