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Hydrogenaudio Forums > Lossy Audio Compression > MP3 > MP3 - General
Mwongozi
I've got some WAVs I want to encode to MP3, but they're 32KHz rather than 44.1, and if possible I don't really want to resample them, ie. I want 32KHz MP3s too.

So far I've been using "--alt-preset standard -Y", which seems to work just fine, but is there a better way?
June
Hi

I've encoded some 32Khz Wavs too, mainly PSX XA rips which extract as 32Khz using PSound. I've just used -aps, but I have an addition to this query-

32Khz means frequencies up to 16Khz are stored in the sound file right? If so, I'm sure -aps is a major overkill frequency wise?? Or does it 'figure out' that the original Wav contains no frequencies over 16Khz and just imposes a cut off and uses all the bits wisely below 16Khz?

Why do you want to have 32Khz MP3 files anyhow, to save space perhaps? Are 32Khz MP3 files possible?

Time to dash,
J.
Mwongozi
QUOTE
32Khz means frequencies up to 16Khz are stored in the sound file right? If so, I'm sure -aps is a major overkill frequency wise??


That's why I'm using -Y in addition to APS. It tends to limit the MP3 to 16KHz anyway, an also has the added benefit of reducing the bitrate.

QUOTE
Why do you want to have 32Khz MP3 files anyhow, to save space perhaps? Are 32Khz MP3 files possible?


They are indeed possible, and yes, to save space. The switches I'm using do sucessfully create 32KHz MP3s, I was just wondering if there was a more "optimal" way, that's all.
roman
AFAIK, only Ogg Vorbis has troubles to encode 32000 wavs - at same bitrate 44100 gives more quality.
Should know, lame silently does resampling to 32000 when you encode 44100 wav to bitrate 96 and below.
And AAC from Nero makes same thing.

But there is one serious moment. Not all soundcards replays 32000 stream as good as 44100 (for example, CM8738 chip worstly scratches that sound). And nothing know about portables - you should read in his manual can it decode/play 32000 mp3 and doesn't it worst.
So, be carefull with 32000.
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