How to Convert Mono sound to Stereo Sound?

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I ve a video file that record in mono sound.(the viewcam have only mono
output). I one to convert the sound to stereo. is that a way to do it in PC?
I try it on Adobe premier but canot. Or they is another way?

Thanks.
 
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"cheamc" wrote...
> I ve a video file that record in mono sound.(the viewcam
> have only mono output). I one to convert the sound to stereo.
> is that a way to do it in PC? I try it on Adobe premier but
> canot. Or they is another way?

Assuming you realize that you can't REALLY convert mono to
stereo. If you have any questions about this, ask over in one of
the audio newsgroups, i.e. news:rec.audio.pro

If you mean how do I take something recorded on one channel
and duplicate it to the other channel, that is a matter of using the
appropriate adapters, mixers, etc when dubbing (or duplicating
the channel during editing in Premiere, etc. "Audio Options,
Duplicate Left or Duplicate Right", etc.))

If you really mean how do I take a mono track and create "pseudo-
stereo" there are some audio editing applications that have this
feature, but it is universally "cheesy" at best, and often dreadful.
 

Brian

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"cheamc" <cheamc@nittoku.po.my> wrote:

>I ve a video file that record in mono sound.(the viewcam have only mono
>output). I one to convert the sound to stereo. is that a way to do it in PC?
>I try it on Adobe premier but canot. Or they is another way?
>
>Thanks.
>
Most video editors let you pan the sound. This is like a balance
control where you can make the sound appear at a certain location
between two speakers. You could locate a certain sound such as a voice
on the left speaker then locate another voice or sound on the right
speaker using the pan or balance audio control.
This would work if one person is speaking at a time. When the person
on the left speaks when you would pan the sound to the left speaker
and pan to the right when the person on the right is speaking. This
can be applied to sounds as well.

You could also try adding stereo background music to make the video
appear to be in stereo.

Some sound processing programs have a simulated stereo feature for
creating a stereo effect from mono sound.

Regards Brian
 
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Brian <bclark@es.co.nz> wrote in message news:<vk0pb09p4cg612eui1dkdq2bkrgvgh07hg@4ax.com>...
> "cheamc" <cheamc@nittoku.po.my> wrote:
>
> >I ve a video file that record in mono sound.(the viewcam have only mono
> >output). I one to convert the sound to stereo. is that a way to do it in PC?
> >I try it on Adobe premier but canot. Or they is another way?
> >
> >Thanks.
> >
> Most video editors let you pan the sound. This is like a balance
> control where you can make the sound appear at a certain location
> between two speakers. You could locate a certain sound such as a voice
> on the left speaker then locate another voice or sound on the right
> speaker using the pan or balance audio control.
> This would work if one person is speaking at a time. When the person
> on the left speaks when you would pan the sound to the left speaker
> and pan to the right when the person on the right is speaking. This
> can be applied to sounds as well.
>
> You could also try adding stereo background music to make the video
> appear to be in stereo.
>
> Some sound processing programs have a simulated stereo feature for
> creating a stereo effect from mono sound.
>
> Regards Brian


Actually there are a number of ways to make mono sound into stereo
sound but Premiere is usless. Download Audacity for free and use that.
You'll have to export the sound from the original clip and then
re-import it and sync it later to it's original clip (or syncing can
be done in Quicktime Pro or something like that).

The easiest way is to duplicate the mono sound onto a second track
(making sure the're in perfect sync) and "invert" the second track,
then pan each to hard gleft and right. this will give you a faux
stereo spread, but if you try to listen to the sound in mono it will
disappear. This is bad.

Secondly you could duplicate the sound onto a second track and again
pan each hard left and hard right, and then apply reverb to one track,
which would give the impression of a direct sound from one speaker
reverberating in the second, though this might not be the effect you
want. Some reverb effects will automatrically create a stereo effect
from mono, by creating different echo patterns in the left and right
speaker. Alternatively you could apply a stereo chorus effect.

The Best Way is more complex. Duplicate the soundtrack twice (so that
you have three identical soundtracks. Pan one track hard left, one
track hard right and one dead centre. Shift the centre track by a few
milliseconds then invert either the left or right channel.

If you had a Mac, I'd recommend you download Sound Hack - that can do
all sorts of spooky things with stereo. I don't know the alternative
to that in the PC world.

Dylan
 
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> If you had a Mac, I'd recommend you download Sound Hack - that can do
> all sorts of spooky things with stereo. I don't know the alternative
> to that in the PC world.

Or go to dplay.com/dv, scroll down to Sept '01, and download the free
tunable mono>pseudo stereo preset, mono compatible, for SFX Machine. SFX
Machine is a $25 - $99 Mac/Win audio app that any sound designer should
have.

Or download Stereoizer (moderately tunable Windows applet, but no
previews) from the same source.

--
Correct address is spell out the letter j, AT dplaydahtcom
Clio- and Emmy-winning sound design
Learn audio for video at www.dplay.com
 
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Wow, they are so many way to do it. Anyway, thanks for your support and
idea. I have follow one of the richard suggest using priemiere. Since i have
the priemiere pro I would like to try it. And I have success to duplicate
the left channel to the right channel. First by hightlight the footage and
choose Audio option>breakout mono channel. Than three separete file will
appear with one video and two audio left and right.
I drag the original video footage to the timeline and unlink the video and
audio. Cut out the audio and drag the left channel audio to the timeline
with will place at audio 4. (the left channel ve sound). Encode it became
one file and get the stereo sound.
 
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On Thu, 3 Jun 2004 01:01:17 +0800, "cheamc" <cheamc@pc.jaring.my>
wrote:

>Wow, they are so many way to do it. Anyway, thanks for your support and
>idea. I have follow one of the richard suggest using priemiere. Since i have
>the priemiere pro I would like to try it. And I have success to duplicate
>the left channel to the right channel. First by hightlight the footage and
>choose Audio option>breakout mono channel. Than three separete file will
>appear with one video and two audio left and right.
>I drag the original video footage to the timeline and unlink the video and
>audio. Cut out the audio and drag the left channel audio to the timeline
>with will place at audio 4. (the left channel ve sound). Encode it became
>one file and get the stereo sound.
>
>



If you use any of the tricksy techniques described in this thread you
will, although they can be superficially impressive, soon REALLY wish
you hadn't :)
 
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"cheamc" <cheamc@nittoku.po.my> wrote in message news:<40bc0b65$1_1@news.tm.net.my>...
> I ve a video file that record in mono sound.(the viewcam have only mono
> output). I one to convert the sound to stereo. is that a way to do it in PC?
> I try it on Adobe premier but canot. Or they is another way?
>
> Thanks.

Among other suggestion, one can put a small delay between the
left/right channel. We're talking milliseconds. The larger the
delay, the larger the separation sounds, until the delay is so large
that your brain can actually tell that the two are delayed. Try
around 100ms or so.
 
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On a sunny day (3 Jun 2004 12:20:12 -0700) it happened larrybud2002@yahoo.com
(Larry Bud) wrote in <5db363e0.0406031120.2577755d@posting.google.com>:

>"cheamc" <cheamc@nittoku.po.my> wrote in message news:<40bc0b65$1_1@news.tm.net.my>...
>> I ve a video file that record in mono sound.(the viewcam have only mono
>> output). I one to convert the sound to stereo. is that a way to do it in PC?
>> I try it on Adobe premier but canot. Or they is another way?
>>
>> Thanks.
>
>Among other suggestion, one can put a small delay between the
>left/right channel. We're talking milliseconds. The larger the
>delay, the larger the separation sounds, until the delay is so large
>that your brain can actually tell that the two are delayed. Try
>around 100ms or so.
My experience is that steps of 1ms give a position effect (left right),
more then 3 or so ms give echo - spatial, more then 10 you can't tell
what is happening, but start to hear echo.
On music 10 ms is already pretty annoying.
100 ms and you lose lipsync to.
JP
 
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> Among other suggestion, one can put a small delay between the
> left/right channel. We're talking milliseconds. The larger the
> delay, the larger the separation sounds, until the delay is so large
> that your brain can actually tell that the two are delayed. Try
> around 100ms or so.

1/10th second - which is what 100 ms is - is on the threshold of where
people will hear it as two sounds.

Putting a somewhat smaller delay will just pull the sound to the other
channel (precedence effect).

Either case, you'd be really messed up if somebody's listening in mono...
which is what most of the VHS setups in this country are (stereo VHS decks
usually have mono RF outs).

Use the phase technique described earlier, and implemented on the free
software I pointed to: signal to both channels, signal delayed ~10 ms and
added to right, same delayed subtracted from left. This makes
complementary comb filters, which broadens the sound while keeping it
centered, and the effect completely disappears for mono listeners.

--
Correct address is spell out the letter j, AT dplaydahtcom
Clio- and Emmy-winning sound design
Learn audio for video at www.dplay.com
 
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Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote in message news:<69e6b557457297f5da38603cb5a96e75@news.teranews.com>...
> On a sunny day (3 Jun 2004 12:20:12 -0700) it happened larrybud2002@yahoo.com
> (Larry Bud) wrote in <5db363e0.0406031120.2577755d@posting.google.com>:
>
> >"cheamc" <cheamc@nittoku.po.my> wrote in message news:<40bc0b65$1_1@news.tm.net.my>...
> >> I ve a video file that record in mono sound.(the viewcam have only mono
> >> output). I one to convert the sound to stereo. is that a way to do it in PC?
> >> I try it on Adobe premier but canot. Or they is another way?
> >>
> >> Thanks.
> >
> >Among other suggestion, one can put a small delay between the
> >left/right channel. We're talking milliseconds. The larger the
> >delay, the larger the separation sounds, until the delay is so large
> >that your brain can actually tell that the two are delayed. Try
> >around 100ms or so.
> My experience is that steps of 1ms give a position effect (left right),
> more then 3 or so ms give echo - spatial, more then 10 you can't tell
> what is happening, but start to hear echo.
> On music 10 ms is already pretty annoying.
> 100 ms and you lose lipsync to.

Could be. I don't do sound editing often, so I may be off by a factor of a few :)
 
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"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:10bo3nsfh1jij3e@corp.supernews.com...
> "cheamc" wrote...
> > I ve a video file that record in mono sound.(the viewcam
> > have only mono output). I one to convert the sound to stereo.
> > is that a way to do it in PC? I try it on Adobe premier but
> > canot. Or they is another way?
>
> Assuming you realize that you can't REALLY convert mono to
> stereo. If you have any questions about this, ask over in one of
> the audio newsgroups, i.e. news:rec.audio.pro
>
> If you mean how do I take something recorded on one channel
> and duplicate it to the other channel, that is a matter of using the
> appropriate adapters, mixers, etc when dubbing (or duplicating
> the channel during editing in Premiere, etc. "Audio Options,
> Duplicate Left or Duplicate Right", etc.))
>
> If you really mean how do I take a mono track and create "pseudo-
> stereo" there are some audio editing applications that have this
> feature, but it is universally "cheesy" at best, and often dreadful.


Why make it sound like voodoo?

You've got a single-channel signal and you want it panned to the center of a
stereo mix so that you're getting level on both L & R? Just pan the damn
thing to the center. There's nothing "cheesy" or mysterious about it.

Randy
 
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On a sunny day (4 Jun 2004 05:14:41 -0700) it happened larrybud2002@yahoo.com
(Larry Bud) wrote in <5db363e0.0406040414.71a00c2b@posting.google.com>:

>Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote in message news:<69e6b557457297f5da38603cb5a96e75@news.teranews.com>...
>> On a sunny day (3 Jun 2004 12:20:12 -0700) it happened larrybud2002@yahoo.com
>> (Larry Bud) wrote in <5db363e0.0406031120.2577755d@posting.google.com>:
>>
>> >"cheamc" <cheamc@nittoku.po.my> wrote in message news:<40bc0b65$1_1@news.tm.net.my>...
>> >> I ve a video file that record in mono sound.(the viewcam have only mono
>> >> output). I one to convert the sound to stereo. is that a way to do it in PC?
>> >> I try it on Adobe premier but canot. Or they is another way?
>> >>
>> >> Thanks.
>> >
>> >Among other suggestion, one can put a small delay between the
>> >left/right channel. We're talking milliseconds. The larger the
>> >delay, the larger the separation sounds, until the delay is so large
>> >that your brain can actually tell that the two are delayed. Try
>> >around 100ms or so.
>> My experience is that steps of 1ms give a position effect (left right),
>> more then 3 or so ms give echo - spatial, more then 10 you can't tell
>> what is happening, but start to hear echo.
>> On music 10 ms is already pretty annoying.
>> 100 ms and you lose lipsync to.
>
>Could be. I don't do sound editing often, so I may be off by a factor of a few :)
I know this, because I am matching up sound channels (mainly speech),
with translation, that also have original sound (so I can have 5 languages
in 5.1 ac3 on DVD). You put then one channel on the PA and the others on headphones
with translations.
The original sound in each channel must be in phase, my software combine_wave
at http://ip51cf87c4.direct-adsl.nl/panteltje/dvd/ allows you to do this
in Linux from the command line, without any GUI in a few seconds.
It has a finest resolution of 1mS... Perhaps I will make 0.1mS in a next version,
but 0.1mS in this case is only 48000 / 10000 say steps of 5 samples...
Audio is a very sensitive thing really.
And I am not even an audio freak!
JP