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Quicktime pro resampler quality?
Mix3dmessagez
post Mar 28 2012, 20:23
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I use quicktime to downsample needledrops to 48hz tvbr *for ipod use*
I've also come across foobar sox resampler which I've read is the best
I've tried to do comparisons *downsample with sox to 48000hz then convert with quicktime or convert using quicktime*
Usually the bitrates will be the same *on average* however sometimes sox downsamples will be one bit higher *on average*
I've tried to look at the individual bitrates for the first few seconds of each song *Just to see if there's a conclusive difference* and they seem to handle things quit differently, I notice the bitrate changes faster when downsampled with sox, I know that probably isn't a determinant as to quality, but it's all I know
With sox I use very high, 48000hz, 95% passband, allow aliasing, 25% phase response *someone at another forum said those are best settings*
On quicktime, best quality, variable bit rate, and recommended sample rate
I also want to know as if Sox is better I can resample all needledrops to 48hz flac *from 96 to save space*
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Wombat
post Mar 29 2012, 16:58
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QUOTE (SebastianG @ Mar 29 2012, 10:35) *
Though, I don't know what "25% phase response" is supposed to mean.

It is an audiophile attempt to solve a problem we canīt hear. With telling sox to use 25% phase response you try to get rid of the "pre" ringing around fs/2 and trade it against lots more "post" ringing. This is meant to sound much better. The little detail that you alter the signal completely into the audible signal of cause doesnīt count smile.gif

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Posts in this topic
- Mix3dmessagez   Quicktime pro resampler quality?   Mar 28 2012, 20:23
- - DVDdoug   QUOTE *someone at another forum said those are bes...   Mar 28 2012, 20:48
- - IgorC   http://src.infinitewave.ca/ has Apple resampler i...   Mar 28 2012, 21:20
- - Mix3dmessagez   QUOTE (DVDdoug @ Mar 28 2012, 15:48) [gia...   Mar 28 2012, 22:27
|- - saratoga   QUOTE (Mix3dmessagez @ Mar 28 2012, 17:27...   Mar 28 2012, 23:19
|- - Mix3dmessagez   But what if the source material is digital and pre...   Mar 28 2012, 23:29
|- - saratoga   To be clear, I'm saying that the process of cr...   Mar 28 2012, 23:31
- - nu774   If you are using MacOS X, you can try afconvert (C...   Mar 29 2012, 05:05
- - SebastianG   I don't know about how well Quicktime does res...   Mar 29 2012, 10:35
- - Wombat   QUOTE (SebastianG @ Mar 29 2012, 10:35) T...   Mar 29 2012, 16:58
- - Wombat   I hope it is of some help. I did some simple examp...   Mar 31 2012, 03:15
- - Mix3dmessagez   QUOTE (nu774 @ Mar 29 2012, 00:05) If you...   Apr 12 2012, 01:40
|- - nu774   If you are interested, now qaac lets you play arou...   Apr 12 2012, 03:26
- - Wombat   If there really someone was interested in listenin...   Apr 12 2012, 02:14
- - Mix3dmessagez   QUOTE (Wombat @ Apr 11 2012, 21:14) If th...   Apr 12 2012, 04:23
|- - nu774   Try something like the following QUOTE -V 127 --na...   Apr 12 2012, 05:08
|- - Mix3dmessagez   Hi, thank you so much!I see you are the creato...   Apr 12 2012, 05:35
|- - nu774   Still getting errors? See what foobar2000 says on ...   Apr 12 2012, 06:41
- - nu774   Ah, I've forgotten one thing: You will need ...   Apr 12 2012, 06:49
|- - Mix3dmessagez   QUOTE (nu774 @ Apr 12 2012, 01:49) Ah, I...   Apr 12 2012, 06:56
|- - nu774   QUOTE (Mix3dmessagez @ Apr 12 2012, 14:56...   Apr 12 2012, 07:25
|- - Mix3dmessagez   thanks, solved my issue!last problem though, I...   Apr 12 2012, 07:39
|- - nu774   QUOTE want quicktime best vbr but in its quicktime...   Apr 12 2012, 08:09
|- - Mix3dmessagez   I'm sorry for being unspecific.I'll try to...   Apr 12 2012, 08:37
|- - nu774   Well, it's interesting. Quickly tried now QT p...   Apr 12 2012, 09:45
|- - Mix3dmessagez   QUOTE (nu774 @ Apr 12 2012, 04:45) Well, ...   Apr 12 2012, 21:55
|- - nu774   QUOTE (Mix3dmessagez @ Apr 13 2012, 05:55...   Apr 13 2012, 02:31
|- - Mix3dmessagez   QUOTE (nu774 @ Apr 12 2012, 21:31) QUOTE ...   Apr 13 2012, 02:50
|- - nu774   QUOTE (Mix3dmessagez @ Apr 13 2012, 10:50...   Apr 13 2012, 04:53
|- - Mix3dmessagez   QUOTE (nu774 @ Apr 12 2012, 23:53) QUOTE ...   Apr 13 2012, 05:37
|- - nu774   QUOTE (Mix3dmessagez @ Apr 13 2012, 13:37...   Apr 13 2012, 07:11
|- - Mix3dmessagez   QUOTE (nu774 @ Apr 13 2012, 02:11) QUOTE ...   Apr 13 2012, 07:23
|- - nu774   QUOTE (Mix3dmessagez @ Apr 13 2012, 15:23...   Apr 13 2012, 08:07
|- - Mix3dmessagez   QUOTE (nu774 @ Apr 13 2012, 03:07) QUOTE ...   Apr 13 2012, 09:14
|- - IgorC   QUOTE (Mix3dmessagez @ Apr 13 2012, 05:14...   Apr 13 2012, 16:44
- - Wombat   Better ask on some audiophile forum for an abx of ...   Apr 13 2012, 14:06


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