Monday, August 20, 2012

Oversimplified usage listing of mp3 and wma compressions

Here is a oversimplified listing  of the MP3 compressions :Notice that as the number in the left pane is higher ,  the  higher the filter and thus higher fidelity audio. The higher numbers can offer the abilities or the  lower numbers  too.  
Notice: The program  used is Music match jukebox that offers  the  curves shown in http://zlgr.multiply.com/reviews/item/22
kbps
approximate usage -
8 - 11 kbps
    suitable for recording telephonic conversations , voice  recording . narrowband AM radio
16
the above plus high fidelity  speech, AM radio, low fidelity streaming radio
24- 32kbps
high quality speech , AM radio [medium and shortwaves ]
44-56
 low fidelity FM radio
64
older fidelity FM radio
96-128
CD  quality audio
192
CD quality -
256
'Store'  mode for CD  quality

and for WMA - fior anyone interested , as  tested with Musicmatch Jukebox . For me  mostly
5-8-12
 just simple voice recording
16-22
high quality speech recording , 22 seems  as HIFI
44
 good for FM
48
CD audio  compromise , best for mass storage
64
CD  recording   = 128 on MP3
96
'high quality' CD recording =192 on MP3

And notice the  following:
The above listing is still controversial  and depends on the program and codecs you use. Older  lame codec [used in goldwave ] does not offer the same audio quality
and several  comments on windows media wma files:
- offering lower dynamic range :  they can clip very low voices
- on hardware players :
   - they can drain the double current .
   - in most older MP3 players i tested , the WMA codec  can  offer better audio than its MP3  codec||
   - the  wma codec may introduce its own noise  with 'cracks' in sudden audio changes  or in loud points.

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