And here's the secondpart.
-------- Original Message --------
Subject: [newbie] Recording Net-Radio Broadcasts (Chpt 2)
Date: 25 Jun 2002 03:39:17 -0400
From: Lyvim Xaphir <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: NewbieMandrake-List <[EMAIL PROTECTED]>
In the previous email to this one I demonstrated how you could bring the
Sox sound utility up to speed with Ogg Vorbis encoding. Because of some
very competent and excellent help I now know we need to amend the sox
installation steps.
Formerly it looked like this:
__________________________________________________
./configure
make
After that we need to edit the Makefile that we just made. Do
vi Makefile
__________________________________________________
Now it looks like:
./configure --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib \
--sysconfdir=/etc
make
make install
With no editing of the Makefile, and everything else remains the same.
Much better approach; thanks Tom Lyons! However, as dfox pointed out,
sox likes to put uncompressed man page files out there, so after Tom
Lyon's ./configure addition above we still need to do the following:
cd /usr/share/man/man1
(deleting the old originals)
rm -f sox.1.bz2
rm -f play.1.bz2
rm -f soxexam.1.bz2
(compressing the newer and more up to date manpages)
bzip2 sox.1
bzip2 play.1
bzip2 soxexam.1
There are symlinks in the man1 directory that point to the compressed
man page filenames; we need not destroy or recreate those because they
will become valid as we replace their targets with the proper files.
(after the bzip2 process.)
Now we will put Sox to work as we get Realplayer installed and
functional. The Sox recompile has been and is the most complicated part
of this (unless you are hunting Windows Media streams, but that's
another time), so don't run yet. The rest is pretty straightforward
stuff.
Realplayer can be a little tricky to get ahold of if you haven't done it
before. There are two ways I can think of for everyone here and neither
one of them involve going to the Realplayer site for a download. I've
heard fuzziness about the binaries on the Realplayer site, and haven't
experienced them myself, but have listened intently to others.
The number one way to get Realplayer is to be a member of the Mandrake
Club. Like me, for instance. ;D In that case you can get it from the
following link:
http://www.mandrakeclub.com/modules.php?name=Downloads&d_op=search&query=realplayer
This gets you RealPlayer-8.0-3mdk.i586.rpm; which is a newer and slicker
rpm. Works better too, IMO.
If you are NOT a Mandrake Club member, you can get the rpm from this
link:
ftp://speakeasy.rpmfind.net/linux/freshrpms/misc/RealPlayer-8.0-1.i386.rpm
After you download the rpm from one of these, you go to the directory
you put it in ( ~/tmp, perhaps) and issue the following:
rpm -ivh RealPlayer-8.0-blah.rpm
You also need to review at this point that your soundcard is fully
functional, and also that you have Kmix installed. Kmix is a graphical
util that controls all available aspects of your soundcard as it sees
them; and usually it sees the most. If you don't have it pull up
rpmdrake and do a search on your installation cd's for it.
Now pull up Kmix from your menu or from an Eterm or terminal prompt.
You will notice a bunch of sliders and alot of green lights, with one
red light lit up across the bottom. The greens represent all sources
that are sending to or have access to /dev/dsp. Turn them ALL OFF except
for anything labeled with a RED right triangle across the top, and the
master volume and PCM sliders. Of the Red right triangles, there are
only two that seem to affect recording on my system: Ogain and Recmon.
These need to have green lights. If you have these two sliders, leave
them green and turn the other red triangles off. This is important.
The controls vary from soundcard to soundcard, depending on it's
features. You may need to experiment; but this section gives you the
basic blueprint.
Your soundcard may be different in the next step too, so again you may
have to experiment. Notice that the Master and PCM sliders are almost
to the top; they work just fine right there. Move your Gain sliders
almost to the bottom; the same degree that the Master/PCM sliders are
from the top. Know what I mean here? This is the proper degree of
adjustment for my system; I assume here that it will work for you as
well.
Now let's deal with the red lights across the bottom. This represents
your recording source; and There Will Only Be One. Yep, just like
Highlander. Your One needs to be Master, so make sure that one is lit
up under the Master slider, and all the other ones are dark. What am I
doing and why, you ask? Well, noise is a real problem. By carefully
targeting what channels are active and deactivating the majority of
them, you are assured ( or given a higher probability of getting) a
noise free recording. If a channel is not on, you can't get static from
it.
Now we prep Realplayer for testing. Open up an Eterm or terminal of
your choice and type "realplay" at the command line. Go ahead and give
it bogus information so it won't bug you anymore. Go into
Preferences-Support and disable "Supply connection-quality data to
RealServers", so unsolicited packets will not be sent out of your
machine. Under "Sound Card Compatibility", make sure that 16 bit is not
disabled (unless you need it to be). Under "Audio Driver Options" the
best way to go is to run RealPlayer under Esd, or Esound support. This
means that the Esd daemon should be running. If not, you can probably
stay with the native drivers option and things will work; I just
sometimes like doing several things at once, and Esd allows one to do
that without locking the sound device. Stuff like playing a late nite
game and listening to news, if you arent recording. Now close
Realplayer; I think that's everything.
OK, this is the acid test. Pull up konqueror and just for a test go to
the following URL:
http://mediaframe.yahoo.com/launch?lid=rna-14-p.924052&p=radio&c=affiliate&f=278153903&.abg=ffffff&.small=1&.ch_cursel=&.rst=a&.adw=http%3a//www.broadcast.com/radio/talk/wtaw/wtaw_dw.htm&.image=http%3a//us.i1.yimg.com/us.yimg.com/i/radio/st/WTAW.gif&a=0,30
Pick Realplayer and the 28.8 speed internet connection. After you accept
settings, you will get a download dialog. Tell it to "open". When you
get the "open with" dialog, type in "realplay" and hit OK.
Now Realplayer should come up and you should be connected to WTAW radio
out of College Station, Texas. You should be hearing sound out of your
speakers now. If not, double check your Kmix settings.
Now dfox is rubbing his hands together cause he knows it's going to get
interesting. ;) OK, in your Eterm or fav terminal program, and also
while you are in your ~/tmp dir or similar, you want to enter the
following:
sox -V -c2 -r 44100 -t ossdsp -w -s /dev/dsp test.ogg
This should start (transparently) recording your net broadcast whilst
you are simultaneously listening to it. If you want to terminate the
recording to listen to the ogg file, hit cntrl-c and sox will properly
terminate the file.
Explanation of the above settings:
-V tells you what Sox is doing as it does it. Otherwise you don't see
too much.
-c2 sets up the recording for two channels in stereo.
-r 44100 samples the sound data from /dev/dsp at CD quality rate.
-t ossdsp -w -s /dev/dsp is a system of qualifiers that tells sox what
kind of device file it should be listening to and what to expect from
the data type that's coming from it; i.e., your soundcard's digital data
stream.2
test.ogg looks innocuous, but the suffix of the filename is telling sox
what kind of file you want to record! That's right, there's no extra
qualifier for the type of output file; it interprets what you want from
the output file suffix. Thus, if you want wav, you put test.wav. And
sox records that filetype.
After you've recorded for a while, hit cntrl-c in the terminal window
that you started sox in, and you'll get a command line. Now enter
xmms test.ogg
And listen to what you've got. Hopefully you've got an ogg that
recorded at 370kbps or so.
If you like, while xmms is running, you can run the sox command line
above in a terminal window and make a recording of your recording as it
plays back. Not that it's useful, it's just a demo of what's possible.
Right now I'm working on editing the oggfiles to cut out unwanted
segments; I'll cover that in the next chapter, unless someone has an
editing procedure that they want to share.
LX
--
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--
Graham Watkins
For me, morning begins when I realize that the soft warm body curled up next
to me is a cat. (Kinky Friedman - Frequent Flyer)
Registered Linux user number 265254 http://counter.li.org
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