alsa and sox questions

[Igor Gueths]

Hi Greg. One thing you can do is make sure the mixer settings on your card unmute line and make sure that line-in levels are up to a good level, then turn up the sound on the tape recorder until it clips and distorts. Then turn the volume back down slightly, and you should get a good recording level. I used to do this when recording tapes, and it worked great for me. 
----- Original Message ----- 
From: Gregory Nowak <gnowak1 at uic.edu>
To: <speakup at braille.uwo.ca>
Sent: Friday, March 29, 2002 3:59 PM
Subject: Re: alsa and sox questions


> Thanks. One more question that came to me is what's the best way to set the volume on the card line in jack, and on the tape player, so that the sound quality is just right. The reason I'm asking this is because my choice seems to be only to wire the line in of the card to the headphone jack of the tape player.
> Greg
> 
> 
> On Fri, Mar 29, 2002 at 07:53:14PM +0800, Kerry Hoath wrote:
> > Yes you can do channel fiddling I do this when I am copying 4-track tapes.
> > You use the pick effect to split out a channel like this:
> > sox stereo.wav -c1 mono_left.wav pick -l
> > sox stereo.wav -c1 mono-right.wav pick -r
> > You need the -c 1  to tell sox to o nly write 1 channel to the output.
> > If you have a mono wav you _can_ duplicate the left channel like this:
> > sox mono.wav -c2 stereo.wav
> > but mono plays in the center of the stereo image and you are simply duplicating data.
> > The only reason I can see for wanting to turn mon into stereo is if you have
> > some high quality mono samples you want to play on an audio cd that wants stereo data.
> > I had to do this with some mono minidiscs so they'd play on a normal cd player without
> > leaving the right channel silent or playing at the worng sample rate.
> > 
> > Regards, Kerry.
> > On Thu, Mar 28, 2002 at 10:17:06PM -0600, Gregory Nowak wrote:
> > > Hi all,
> > > 
> > > I've been reading here recently that people have been installing alsa 0.90 beta 11. Where did all of you get that from? The newest thing on the alsa-project.org ftp site is still 0.90 beta 9.
> > > 
> > > I also have a sox question. As we know, most audio tapes are recorded to play through both left and right speakers. I think this is defined as left and right channels, but if this isn't correct, please assume that it is throughout this post. Based on reading the sox man page, I think I can do the following, but I need someone to reassure me. 
> > > 
> > > Say again that I have a standard audio tape recorded with left and right channels. Is there a way for me to strip one of the channels from a wave file recording of that tape using sox? What I'm asking is if I record this tape as a wave file, can I then strip either the left or right channels from this recording?
> > > 
> > > Alternatively, let's say that I already have a wave recording where one of the channels has already been stripped, which leaves me with a left channel only from the original tape. Can I use sox to mix the data on that left channel into both a left and right channels? 
> > > 
> > > Please forgive the weirdness of theese questions. However, I really do not care to elaborate why I'm asking them. Yes, it is for a purpose, and depending on what answers I get, I may or may not do what I'm planning, it really is a long story. Thanks for bearing with me, and for any help in advance.
> > > Greg
> > > 
> > > 
> > > _______________________________________________
> > > Speakup mailing list
> > > Speakup at braille.uwo.ca
> > > http://speech.braille.uwo.ca/mailman/listinfo/speakup
> > > 
> > 
> > -- 
> > Kerry Hoath:  kerry at gotss.net kerry at gotss.eu.org or  kerry at gotss.spice.net.au
> > ICQ: 8226547 msn: kerry at gotss.net Yahoo: kerryhoath at yahoo.com.au
> > 
> > _______________________________________________
> > Speakup mailing list
> > Speakup at braille.uwo.ca
> > http://speech.braille.uwo.ca/mailman/listinfo/speakup
> 
> _______________________________________________
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