Re: iTunes back door, API, DLL raw sample question
Re: iTunes back door, API, DLL raw sample question
- Subject: Re: iTunes back door, API, DLL raw sample question
- From: William Stewart <email@hidden>
- Date: Mon, 1 Jun 2009 12:08:02 -0700
well, yes.
But to be clear - and this is FUD that has been around the net for
years about the "crappy" core audio resampler.
iTunes in both cases is using the core audio resampler - a resampler
that can be run at different quality settings. In the case that you
mention below, iTunes is not correctly handling the setup of the
resampler and so you get a less-than-optimal signal path. In the first
case (where you don't change the device), the core audio resampler is
being set up correctly. But, its the same resampler (the "core audio
resampler") that is being used.
Bill
On Jun 1, 2009, at 8:50 AM, Gordon Rankin wrote:
Message: 5
Date: Fri, 29 May 2009 14:23:56 -0700
From: William Stewart <email@hidden>
Subject: Re: iTunes back door, API, DLL raw sample question
To: email@hidden
Cc: email@hidden
Message-ID: <email@hidden>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
On May 29, 2009, at 1:34 PM, Gordon Rankin wrote:
One of the reason's why iTunes does not sound as good is that
iTunes takes a snap shot of Audio Midi Setup for the device output
in question and resamples to that rate and bit size before it goes
out. So you may have a 44.1/16 bit track then a 24/96 track and
they will both be resampled to the rate specified in the Audio
Midi setup.
The issues in iTunes that gave this a sub-optimal experience This
is an old issue in iTunes that has been addressed.
Bill,
While it is true that the resampler is better in iTunes it still
happens and this conflicts with some of the dacs that use minimal
phase output filters. The results just don't sound as good as they
are when iTunes is outputting at the sample rate of the selection.
Since iTunes takes a snap shot of these settings at run time there
is no way to change the output settings during an iTunes session. If
you do then CoreAudio will resample again which is really bad.
Thanks
Gordon
_______________________________________________
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
_______________________________________________
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