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| | |-+  question about AAC playback.
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Author Topic: question about AAC playback.  (Read 1778 times)

Offline sa24

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question about AAC playback.
« on: October 31, 2009, 04:46:29 PM »
hi everyone, I'm new here and was wondering about AAC and rockbox... :)

As I understand AAC isn't supported. I have an ipod video 30GB with rockbox and all my songs are 256kbs VBR AAC files.
It plays fine UNLESS I have the EQ enabled.-- in which case it skips about every 5 seconds. It works perfectly fine w/o the EQ.

I'm not hoping for much of a solution on this, honestly, but is there anything that can b done to have smooth playback with the EQ enabled?
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Offline saratoga

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Re: question about AAC playback.
« Reply #1 on: October 31, 2009, 04:56:49 PM »
Quote from: sa24 on October 31, 2009, 04:46:29 PM
As I understand AAC isn't supported.

Its definitely supported.

Quote from: sa24 on October 31, 2009, 04:46:29 PM
I have an ipod video 30GB with rockbox and all my songs are 256kbs VBR AAC files.
It plays fine UNLESS I have the EQ enabled.-- in which case it skips about every 5 seconds. It works perfectly fine w/o the EQ.

AAC 256Kbps will use about 40MHz of your 80MHz CPU.  If you enable too many EQ bands you'll run out of CPU and get skipping.  Either use fewer EQ bands, get a faster MP3 player, or use a format rockbox can decode faster.

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Offline sa24

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Re: question about AAC playback.
« Reply #2 on: October 31, 2009, 04:59:11 PM »
Would I beable to use all 5 EQ bands if i used .ogg?
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Offline saratoga

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Re: question about AAC playback.
« Reply #3 on: October 31, 2009, 05:02:23 PM »
I'm not sure.  Ogg takes about 30MHz on your player, so it'll definitely be faster.
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Offline sa24

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Re: question about AAC playback.
« Reply #4 on: October 31, 2009, 05:07:04 PM »
Ok thanks. I'll convert just a few songs to ogg and give that a shot w/ the EQ... And then convert the rest if that works out. If not I suppose ill try some other formats like .mp3 or what not.
thanks!
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Offline saratoga

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Re: question about AAC playback.
« Reply #5 on: October 31, 2009, 05:10:03 PM »
If you don't mind the quality loss from transcoding your AAC files, you could simply apply whatever EQ effects you want on the PC and then reencode the files with the EQ in place. 
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Offline sa24

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Re: question about AAC playback.
« Reply #6 on: October 31, 2009, 06:27:35 PM »
Ok I decided that converting all my music to Ogg in the end was too much of a hassle. I just used less EQ bands. seems to be working fine now and as far as I can tell sounds nice. definitely not as ''filtered'' as before, but stil nice.

thanks for your help  8)
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