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Topic: iTunes MP3 highpass 10hz (Read 2821 times) previous topic - next topic

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  • rizukitomi
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iTunes MP3 highpass 10hz
Guys, Recently i've been messing around with iTunes, and i want to ask about one of all option in iTunes MP3 Encoder, "Filter frequency below 10hz", i don't want to mess with that option, since i never mess with lowpass and highpass, but could someone explain to me about this ? did this increase audio quality ? and what if i use it in LAME, since iTunes MP3 Encoder use it as general basis.

Thanks guys.
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  • [JAZ]
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Re: iTunes MP3 highpass 10hz
Reply #1
I am assuming that the intended usage of that setting, since it is on encoding, is to kill any DC offset that the original audio might have.

  • rizukitomi
  • [*]
Re: iTunes MP3 highpass 10hz
Reply #2
Thanks for the answer, and what about "smart encoding adjustments" option, for all i know, iTunes only have few options, so why there's "smart encoding adjustments" option ?, i can't really see the difference ? except for stereo separation, <200 kbps have joint stereo, and >200 kbps, other than that i don't know... well iTunes mp3 is not like lame, i can see it every time i encode audio because lame has CLI and iTunes not...

Did "smart encoding adjustments" change all settings that i set ? did that change the 10hz highpass value too, because when i see the support page on apple, it's only "smart encoding adjustments" is to maximize quality, that's all...
  • Last Edit: 19 May, 2017, 02:15:41 PM by rizukitomi
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  • [JAZ]
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Re: iTunes MP3 highpass 10hz
Reply #3
I can't comment on that other button and it's been ages since I last used iTunes.

  • j7n
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Re: iTunes MP3 highpass 10hz
Reply #4
Killing DC offset on one file at a time is not necessarily safe. If the filter doesn't remember the history of the preceding audio, and resets at the beginning of a track, and there actually is DC or low frequency rumble preset, this will create a click. I don't know how iTunes does it, whether it processes the whole album at once.

  • rizukitomi
  • [*]
Re: iTunes MP3 highpass 10hz
Reply #5
iTunes does it one file at a time, that's why i ask about it, and it seems like "highpass 10hz" is default option on iTunes MP3, because when i press "restore default settings" that option is checked, should i leave it or unchecked it ?
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