Mailing ListMailing List   FAQFAQ   SearchSearch   MemberlistMemberlist   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Spoken Podcast encoder

 
Post new topic   Reply to topic    www.hairersoft.com Forum Index -> Discussion
View previous topic :: View next topic  
Author Message
chetstone



Joined: 17 May 2009
Posts: 8
Location: Crestone, CO, USA

PostPosted: Sun May 17, 2009 7:25 pm    Post subject: Spoken Podcast encoder Reply with quote

In iTunes Preferences, in the "Import Settings" dialog, Apple offers a "Spoken Podcast" AAC encoder. Does Amadeus Pro provide a similar encoder?

In the Details of this dialog box, the encoder is described as

"32kbps (mono)/64kbps (stereo), 22.5 khz, using voice filtering, optimized for MMX/SSE2"

Will I get this encoder if I select 64 kbps AAC in Amadeus? If I convert my stereo original to mono, will I get 32kbps? (64 kbps is the lowest available setting in Amadeus.)

Most of my recordings are done on my Edirol R-09, so the sample rate is 44.1Khz. Will I need to make some other selection to downsample? Does it matter?

What about the "voice filtering"? Not sure how necessary it is to have that, but I assume I would also have to do some explicit filtering in Amadeus to get it if I wanted?

I think it would be nice if Amadeus Pro simply offered a "Spoken Podcast" encoder that takes care of all this.

Thanks

Chet
Back to top
View user's profile Send private message
Martin Hairer
Site Admin


Joined: 08 Nov 2006
Posts: 1615

PostPosted: Tue May 19, 2009 12:09 am    Post subject: Spoken Podcast encoder Reply with quote

Hi Chet,

right now, Amadeus Pro will only go down to 64kbps, even if the sound
is mono. However, the version at <http://www.hairersoft.com/Downloads/AmadeusPro.zip
Quote:
should allow you to go down to 32kbps if you convert the sound to
mono first. The encoder should be exactly the same as the one Apple
uses in iTunes.

However, I have no idea what the "voice filtering" is. I suppose that
it is some home-grown filter that they apply to it beforehand in order
to enhance the performance of the encoder in the frequency band
commonly used by human voice. There doesn't seem to be any
documentation about what they use there precisely. It might simply
correspond to applying one of their Audio Units with some particular
setting, but the only way of finding out what this is exactly would
probably be to talk to the Apple engineer who added that function Wink
Regards,

Martin

HairerSoft
http://www.hairersoft.com/



_______________________________________________
Amadeus forum mailing list
Unsubscribe / change settings at http://two.pairlist.net/mailman/listinfo/forum_list
Back to top
View user's profile Send private message Send e-mail Visit poster's website
chetstone



Joined: 17 May 2009
Posts: 8
Location: Crestone, CO, USA

PostPosted: Tue May 19, 2009 12:32 am    Post subject: Reply with quote

Thank you Martin!
Back to top
View user's profile Send private message
chetstone



Joined: 17 May 2009
Posts: 8
Location: Crestone, CO, USA

PostPosted: Tue Jun 09, 2009 6:24 pm    Post subject: Re: Spoken Podcast encoder Reply with quote

Martin, I finally got a chance to try this out, and it doesn't seem to work.
I can select lower bit rates, e.g. 32 in the AAC settings dialog, but when
I look at the saved file, it is the same size as the 64kbps file, and in the
Finder info it says "Total bit rate: 63".

Also, I wonder if it would be possible to ask for this setting in the batch processor? Not sure how that would work, since the batch processor is
starting with a stereo file and one of the batch operations will be "convert to mono".

Thanks,
Chet

Martin Hairer wrote:
Hi Chet,

right now, Amadeus Pro will only go down to 64kbps, even if the sound
is mono. However, the version at <http://www.hairersoft.com/Downloads/AmadeusPro.zip
Quote:
should allow you to go down to 32kbps if you convert the sound to
mono first. The encoder should be exactly the same as the one Apple
uses in iTunes.

However, I have no idea what the "voice filtering" is. I suppose that
it is some home-grown filter that they apply to it beforehand in order
to enhance the performance of the encoder in the frequency band
commonly used by human voice. There doesn't seem to be any
documentation about what they use there precisely. It might simply
correspond to applying one of their Audio Units with some particular
setting, but the only way of finding out what this is exactly would
probably be to talk to the Apple engineer who added that function Wink
Regards,

Martin

HairerSoft
http://www.hairersoft.com/



_______________________________________________
Amadeus forum mailing list
Unsubscribe / change settings at http://two.pairlist.net/mailman/listinfo/forum_list
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    www.hairersoft.com Forum Index -> Discussion All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group