OT - Command line manipulation of sound files

[Michael Miles]

Michael Miles wrote:
> Kevin J. Cummings wrote:
>> On 09/06/2010 09:53 PM, Robert wrote:
>>> I attacked the seemingly simply task of producing an audio CD from a
>>> collection of MP3 files and  have concluded that it's not as easy as it
>>> sounds. UNLESS GUI front ends are used!  I would much rather stick with
>>> CLI because scripting works better that way.
>> Check out bbb.  I have bbb-0.0.3-1.i386.rpm installed on my server (from
>> a *long* time ago).  You should be able to find it from
>> www.flyn.org/projects/bbb/download.html.  I think the current version is
>> 0.0.4.
>>
>> bbb is a replacement for burn_baby_burn.  Both are a set of scripts for
>> ripping/burning and generally dealing with CD/CD-R/CD-RWs.
>>
>> I burned many a CD-R with WAV files using it years ago.
>>
>>> I decided that the first step must create a .wav file for each .mp3.  I
>>> found many scripts to do that; kept coming back to the very simple
>>>
>>>      mpg123 -w outfile.wav infile.mp3
>>>
>>> That has worked fine for all the mp3 files I've given it, producing 
>>> .wav
>>> files that play properly with the command
>>>
>>>      play outfile.wav
>>>
>>> Further, the .wav file will be played properly by VLC Player AND if
>>> chosen by k3b as a file to be written to an audio CD, that CD will play
>>> fine in the original factory CD player in my '98 Chevy pickup.
>>> BUT I have spent most of today finding and trying, then rejecting
>>> command-line solutions for writing to CD.
>>> > From http://sharkysoft.com/tutorials/linuxtips/cdcommands/
>>> I find this one
>>>
>>>      cdrecord -v -pad speed=1 dev=5,0,0 -dao -audio -swab *.wav
>>>
>>> Which yields cdrecord: Inappropriate audio coding in '$first_file.wav'
>>>
>>> Then, from
>>> http://www.pallier.org/ressources/linux_howtos/linux_howto.html#tth_sEc24 
>>> we
>>> have
>>>
>>>      cdrecord dev=5,0,0 -pad speed=0 -audio *.wav
>>>
>>> Which doesn't work, either.
>>>
>>>
>>> Again, I have no problem with k3b EXCEPT that I must manually select
>>> which songs to burn to the CD rather than let a script do it ... and
>>> surprise me.
>>>
>>> Any ideas?
>>>
>>> Thanks!
>>>
>>
> The source (mp3) is not a desirable way to reproduce a audio cd.
> The mp3 has undergone a huge loss in the making of the mp3 so when you 
> try and make a cd that is to be played on a home stereo or car deck 
> you will notice a tinny sound.
>
> You can't make something out of nothing.
>
> If you want a high quality cd use sources like cd itself, wav files 
> that have just been produced by ripping a cd, Flac (Free lossless 
> audio codec), iso files, m4a, ape..... these are the most common 
> sources for a proper cd.
>
> A cd runs at 1411kbit/second
> Wav files run at 800- 1411kbit/second
> Flac files are just compressed wav
> ape is pretty much like flac just a different compression scheme
> m4a is a lossy type compression but produces mp4 at 800kbit/second 
> giving a very good quality sound
>
>
>
>
> If you must burn from mp3 make sure the bitrate of the mp3 source is 
> at least 192 224, 320 is max bitrate for lame mp3
> Anything lower than 192 is not going to be worth the blank cd.

    Michael
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