Hi Everett,

You probably need to say more about what you need in terms of  
adjusting playback speed, what software you generally use,  and what  
you want to do in terms of adjusting speed in order to get a useful  
answer.  The basic answer is, yes, you can adjust speed of playback  
with existing applications on the Mac, and you can even do so in a way  
that preserves pitch.  For example, you can play faster or slower in  
VLC or QuickTime Player with keyboard shortcuts, but with fairly  
coarse adjustments of speed.  If you bring up the A/V Controls Window  
of QuickTime Player (Command-K), you can separately interact with  
sliders for pitch and playback speed for finer control.  These  
features are also supported in many sound editors like Audacity  
(freeware), Sound Studio, and Amadeus Pro, and also in Garageband, but  
at different levels of complexity and difficulty of implementation  
depending on exactly what level of control you need and for what  
purpose.

If you want to control speed to learn/listen to music for performance  
(not likely, given the way you've asked your question), you'd be much  
better off looking at specialized software like the Amazing Slow  
Downer from Roni music (or similar products), that will easily let you  
slow down music to learn chord sequences with keyboard shortcuts, and  
also play from CDs with these features enabled.  Scott has used this.

On the other hand, if you want to control playback speed to listen to  
podcasts at a faster rate, then I just do this with QuickTime player  
via AppleScripts that allow me to select tracks in my iTunes library  
and switch player control between iTunes (which doesn't support faster  
playback) and QuickTime Player (which does).  This lets me keep the  
last played position bookmarked.

I think I responded to your post about this in January:

http://www.mail-archive.com/[email protected]/msg49448.html
(Re: speed up slow down I tunes)

The AppleScripts that I use for this, and their source (at the Mac OS  
X Hints page) are described in that archived post.  The source post  
with the two scripts (posted by Louie) are also at the end of that post.

If you want to find out how to control speed and pitch in Garageband  
or Audacity you'll have to ask elsewhere, although I know it's  
doable.  Similarly, you can use options supported in third-party sound- 
editing software to do this, probably with more control and ease that  
working directly with QuickTime.  Again, the best solution for you  
depends on what you want to do, what level of control you need, and  
what other software you may have on your machine.  I haven't done much  
with sound editing software for some time, so likely you'll get better  
answers from other list readers.  Also, since the earlier post didn't  
get much response, it may not be relevant to your needs.

Cheers,

Esther

On Mar 27, 2009, at 2:10 AM, Scott Howell wrote:

>
> I don't know of one that works outside Terminal, but there is Mplayer,
> but you do have to run it from Terminal and in fact you have to
> compile it. However, I believe there is a way to use iTunes to
> accomplish the same task, but I only heard it was possible, I have not
> done it myself.
> On Mar 27, 2009, at 5:11 AM, E.J. Zufelt wrote:
>
>>
>> Good morning,
>>
>> Is there an audio playback application for OSX that will allow me to
>> adjust the speed of playback?  It would be ideal if pitch was not
>> affected by the change in speed, but not altogether necessary.
>>
>> Thanks,
>> Everett
>>
>>
>>>
>
>
> >


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