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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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DVDdoug
post Mar 28 2012, 20:48
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QUOTE
*someone at another forum said those are best settings*
I think you worry too much about stuff you can't hear...

Whenever I've needed to resample (usually between 44.1 an 48kHz), I've never had a problem or noticed ANY sound quality difference between the original and the resampled file. I just used whatever audio editor I was using at the time. Mostly, I've used GoldWave, which is reputed to have a terrible resampler. Still, I don't hear anything... It's apparantly been upgraded since the tests were done, but I've been using GoldWave for a long time so I've probably use the old re-sampler.

Of course, if downsample to 12kHz 8-bits, you're going to hear quality loss. wink.gif

QUOTE
...to downsample needledrops...
Compared to the limitations of analog vinyl, any "damage" done by downsampling is not likely to be noticeable.

P.S.
If you think there might be a difference with different resamplers, you can do some ABX Tests. The goal would be to choose a resampler (and settings) that makes it impossible for you to hear a difference between the original and the re-sampled file.

My guess is that you won't hear a difference with any resampler... You didn't claim to hear a difference. anyway... You said someone else told you there was a difference...

This post has been edited by DVDdoug: Mar 28 2012, 20:59
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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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