Re: Increasing speed without increasing pitch
Re: Increasing speed without increasing pitch
- Subject: Re: Increasing speed without increasing pitch
- From: Chris Adamson <email@hidden>
- Date: Fri, 18 Aug 2017 09:30:06 -0400
Just use AUNewTimePitch (or whatever it’s called) by itself. That’ll change
rate without changing pitch. And it can go more than double-speed (I think the
limits are 1/32x to 32x)
Note that this unit is of type format converter, not effect, because you of the
differing counts of input and output frames.
—Chris
> On Aug 18, 2017, at 8:41 AM, Waverly Edwards <email@hidden> wrote:
>
> Would someone provide some guidance on how you can take an audio file and
> speed it up without changing the pitch.
> I was working yesterday and I added AVAudioUnitVarispeed unit to my engine
> and increased the speed by 2. It worked, however I found output to have the
> chipmunk sound.
> Would you use a AVAudioUnitTimePitch unit to lower the pitch to compensate or
> is there a better way to achieve this outcome?
>
> I would like to increase the speed by more than a rate of 2. Is there a
> reason why I couldn’t daisy chain two AVAudioUnitVarispeed units together?
>
> Lastly, is there a way to know how many audio frames were produced after the
> effect completed. Since I have a change in time, the number of frames coming
> in are not the same number going out.
>
> Thank you,
>
>
> W.
> _______________________________________________
> Do not post admin requests to the list. They will be ignored.
> Coreaudio-api mailing list (email@hidden
> <mailto:email@hidden>)
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden <mailto:email@hidden>
_______________________________________________
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