Convert two channel stereo podcast to mono

I recorded a podcast using a Marantz PMD660 and two Shure SM58 mics. The sound is great, but the mics weren't close enough to deliver true stereo results and what I wound up with is pretty distracting -- one person talking from the right channel and another talking from the left.
Is there an easy way to combine these two tracks into one? I've tried importing into iTunes with mono selected, but the result is a mono recording on both channels (good), but with levels knocked down at least 50 percent and audio generally muddy (bad).
Leigh Hanlon
http://chicagoscope.com

If HT's post doesn't work try "Monomaker"
http://destroyfx.smartelectronix.com/extras/

Similar Messages

How can I export 6 mono tracks and a one track two channel stereo pair in a quicktime as separate tracks?

I'm using Premiere Pro CC 2014 (8.1) and need to export a 5.1 mix as well as the stereo tracks as 7 separate tracks in a quicktime. If I select 8 channels it automatically creates 8 tracks. Also, if I export the the seventh stereo track as mono track won't it play mono?
Thanks in advance for nay help you can offer.
-Sam

Hi Richard and Kevin.
First of all thanks so much for the response and info. Just to clarify, you're saying I will need 8 tracks, 2 of which will be designated for the stereo pair, right? My concern is that I'm supposed to deliver only 7 tracks. They want the stereo pair as separate channels on one track. I'm wondering if I can create a one track stereo pair and put it on a stereo track, then export only the seven mono tracks (plus an empty track). Would the stereo still work?
Thanks for the link to the previous post. I had actually read it and though it was helpful in explaining how to set up the audio tracks I was still confused about the export.
Much thanks,
Sam

There is no 5.1 OVER HDMI on the HP PAVILION DV7 only two channel stereo!!!

Dear HP
I have a Pavilion dv7 laptop.
I am able to connect my laptop via HDMI to my Samsung 55 LED. Video transfer is in HD. Sound is also transmitted but only in 2 channel format rather than 5.1 channel format. In the sound settings via control panel I have tried to reconfigure but there is only a 2ch and no 5.1ch setting. The same is the case in the 'Speakers and Headphones' (IDT High Definition Audio CODEC) setting
The 5.1ch output setting should be present as Windows 7 professional is compatible with this as should be my laptop, and my TV has an inbuilt Dolby Digital processor which conveys 5.1Ch sound to my home cinema unit.
My home cinema system DOES support and decode Dolby & DTS 5.1. This is connected to my TV via optical cable.
TV transmissions from Freesat that are in Dolby Digital 5.1 do output correctly in 5.1 via my home cinema system, this is why I know for a fact that my TV DOES output in Dolby Digital 5.1. There is a light on my Home cinema system which confirm the inputted sound is 2ch or 5.1ch.
There is no error with my TV or Home cinema System - there is a problem with my Pavilion laptop failing to output 5.1.
Please help!
Many thanks

Hi,
DV7 is a series of dozens if not hundreds of models, what is yours ? Please bear in mind normally HDMI sound on computers go from video cards, not "sound" cards.
Regards,
BH
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Convert/Mixdown Stereo Wav to Mono Wav

Hello,
i have a problem with automating Quicktime via Applescript. I´ve got thousands of two channel stereo interleaved pcm coded (aif, wav) audio files that i want to convert to split stereo files, i.e. mystereo.wav --> mystereo.L.wav AND mystereo.R.wav
I found a solution to save a QT-export-settings file with Applescript following these instructions: http://lists.apple.com/archives/QuickTime-Users/2002/Nov/msg00294.html. So this is how i made the export set to MONO!
My idea was to open the stereo interleaved file, set the pan to left, export to mono, then set the pan to right and export again to mono. I automated theses actions with applescript and it seems to work. BUT ...
Unfortunately quicktime exports 2.0 stereo tracks (one channel silent, the other with programme) instead of following the export settings and merge to mono?
Am i doing something wrong?
Why behaves QT this way?
How can i force quicktime to export mono files?
Thanks in advance for your answers.
b.

Not sure about the Applescript part (I am just delving into that myself), but the method I use to output separate L and R channel mono files from a stereo interleaved in Quicktime is as follows:
1) Open the stereo file, bring up the Movie Properties window (Command-J)
2) Click the "Soundtrack" entry in the list, then click the "Audio Settings" tab
3) On the right hand side of the window is a list of Channel Assignments.
4) For your Left channel export, assign channel 1 to "Left" and channel 2 to "Unused" from the pop-up list.
5) Choose "Export" from the file menu, select "Sound to WAVE" or "Sound to AIFF"
6) Click the "Options" button, choose your setttings, and make sure that "Mono" is selected in the Channels setting.
7) Name the file "mystereo.L.wav"
Repeat steps 4-7 for the Right channel (e.g. set Channel 1 to "Unused" and Channel 2 to "Right")
Let me know if you get anywhere with the Applescript, I do this manually every week to separate L and R channels for a podcast I produce, and would love to have a more automated way to deal with it.
-K

Capturing mono VHS footage, how do I convert audio to stereo?

I am creating dvd's from some old VHS tapes, and the audio track is mono, I want to know how to convert audio to stereo? Do I start with the audio settings on Mono or stereo, and then what is the next step to get mono audio converted to stereo?
As always thanks in advance for reading and replying to my post.
Sebastian

SebastianMacLuver wrote:
I am creating dvd's from some old VHS tapes, and the audio track is mono, I want to know how to convert audio to stereo? Do I start with the audio settings on Mono or stereo, and then what is the next step to get mono audio converted to stereo?
Are you wanting to add a second channel of audio along side the mono track?
Or, are you wanting to double the mon track into a faux-stereo track?
Either way, DO start with a stereo track on your audio settings.
But if your VHS audio is not split into two separate channels of sound, then there is no way to get true stereo.
However, for a faux-stereo sound, try copying the original mono track, paste it to a second audio track then nudge just that track by one frame.
Listen to it and if it doesn't give enough presence to the overall sound, try another frame nudge until you get the sound you like.
This isn't true stereo but will create more of an aural landscape that might satisfy your request.

Converting left channel audio into stereo file

I'm using an edirol ua 25 which has two inputs, 1 which is a left channel and 2 a right channel. As i'm using the first input, the recorded audio pans hard left, how do I go about converting the recorded audio into a central stereo file?

Why do you want to change it to stereo? It isn't a stereo (two-channel) recording, it's a mono, single-channel recording.
Mono is not somehow "worse" than stereo, don't feel that need that everything should be recorded to two channels, it's a waste of resources.
You can pan it anywhere in the stereo field - with the pan knob central, the mono track will be centered in the stereo field. You can pan it left or right accordingly.

Playing multiple stereo channels out one single mono channel tia sal22

Greetings All
I have a vi which creates multiple stereo audio signals
in labview 8.6.1 and I would like to play all of the stereo channels out one single Mono channel
is this possible? I tried setting all the device ID's to the same thing but a lot of clicks and pops occurred. Basically I'm trying to play and mix all the signals out one mono channel at the same time.
Please note I would like to have each signal that is created played over
the mono channel at the same time.
tia sal22
Solved!
Go to Solution.
Attachments:
lvt_audio_realtime-out left right device ID test onw while loop.vi ‏69 KB
stereo_to_mono.png ‏63 KB

sal22 wrote:
Thanks but which options allows me to do this
tia sal22
Just add the arrays if they have the same length. Use the standard add function (like in 2+2=4). Then arrays are added each index is added together
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)

Workflow for moving stereo tracks to mono?

Hi everyone,
I'm a relatively new Audition user (using the latest version of CC); I've been using it to create podcasts using the multitrack editor and flagging out footage with markers in the waveform editor. I recorded a skype conversation and I wanted to mix the audio for a new episode, and I'm hoping that someone can help me with a suggested workflow. In the screencap below, the audio got recorded with stereo channels, and what I am attempting to do find the quickest way to create a two mono channels from what is two stereo channels (although the right channel of one didn't include any audio) – and balance the audio levels between the two mono channels. Screencap enclosed of what i'm beginning with.
I know the multi-track editor can accomplish some of this using the bus feature, but I want to first get this audio right because i want to make markers in the wave form to flag out footage, so i figured that destructive changes to the audio are best. I'm aware that i can extract audio channels to mono and use the match volume feature for clips, but i'm wondering if someone might be able to point me to a quicker/better way.
Thanks a lot,
Quin

In Waveform view, use Edit/Convert Sample Type and just select mono in that section of the conversion options.
The balancing of levels between the two is best done in Multitrack where you can listen--though, looking at your waveforms, you might find it gets easier if you normalise (Effects/Amplitude and Compression/Normalise) to reduce that loud track down to levels closer to the quiet one before you start.
It's worth saying that, if your session is set up to end up in mono, you may well not need to convert your files anyway but this depends on your workflow. If it was me, I think I might convert to mono (even if not strictly necessary) just for tidiness.

Merging clips turns stereo audio to mono

I've got a stereo audio file I'm merging with a RED Epic clip (with replace AV clip audio). Whether I merged by audio waveform or in point, the result is always a merged clip that has two channels, but is no longer stereo. It's like it has taken only the left channel and doubled it. Thoughts?

It's not a dual panned center mono file, there's something wrong with the way it sounds when left is panned hard left and right panned hard right. I've tried panning each channel hard the other way and it still doesn't sound like the original stereo file I've merged it with. Am I doing something wrong? Why wouldn't premiere just replace the AV clip audio with the singe track stereo clip? Why the need to break it out into dual mono? Is there a preference I'm missing or something? This seems unintuitive.

Design flaw in 'Play stereo audio as mono' of Universal Access Hearing-tab

The option to 'play stereo audio as mono' that comes with OSX 10.6 does not work as I expected.
When I enable this option it sounds like only one of the two channels becomes mono, while the other one does not sound mono to me.
It's hard to notice this, because the total sound does change to 'less' stereo.
I've done some testing with different soundcards and testing signals, and found out that when the option is enabled, the mono signals are routed incorrect.
While the right channel becomes mono, the left channel seems to be something else; I'm not sure if it's the original left channel of the stereo signal, though.
I have reason to believe that the resulting mono sound on the right channel correctly is the 'monofied original sound', but that from the left channel.
The resulting mono sound on the left channel sounds like the original left channel of the stereo sound, maybe added with the mono sound of the right channel.
Why do I think so? When using a sound card with more than two outputs, I can clearly see that sound is being sent to the second and the THIRD output, instead of the first and the second output, immediately after I enable mono. Resulting in output on THREE channels:
original left
monofied (left)
monofied (right)
On my soundcard I can disable the extra outputs, and than I hear:
original left + maybe monofied right
monofied (left)
I think the programmer of this great feature made an 'off-by-one error', consequently sending the monified output to the wrong channels;
to channel[1] + channel[2] instead of channel[0] + channel[1]
I don't know what happens to sound that is sent to channel[2] (the third channel) on a two channel soundcard.
It could be mapped to the the first channel, but that of course is speculation. Could be tested though, with the right audio signal.
I hope someone can confirm this. If more people experience this problem, maybe Apple can fix this so I can enjoy listening in mono.
I have tested this on the internal soundcard and three external firewire audio interfaces, of which 2 have 8+ output channels.
Thanks!

Thanks for the quick-and-dirty test.
Your findings are not a surprise to me.
It would be more interesting though to not use one's ears for proof.
Also, I have reason to believe that this result is valid for any two channel audio interface.
With the test below I can proof that audio is sent to three channels instead of just two, when enabling "Play stereo audio as mono" on an(y) audio interface with more than two outputs (enabled).
The test takes a little longer than the quick-and-dirty test.
If you don't have an audio interface with more than two channels of output, you can still perform the test by installing Soundflower first.
Soundflower is a virtual audio interface with multiple inputs and outputs, and can be used as an audio router or audio patchbay.
Get Soundflower from http://code.google.com/p/soundflower/ - it's free.
Here's the test …
Open System Preferences, choose the Sound prefpane and select the Output-tab
Select any audio interface with more than two channels of audio outputs as your sound output device ( Or use "Soundflower (16ch)" )
Keep the System Preferences open
Start Garageband
Create a new project
From Preferences select for Audio Input your interface-with-more-than-two-channels-of-audio ( Or use "Soundflower (16ch)" )
( selecting an Audio Output is not necessary, because we're not actually going to use our ears for proof )
Enable multitrack recording from the menu (Track / Enable multitrack recording )
Create four tracks as "Real instrument"; each one with an increasing Input Source: Mono 1, Mono 2, Mono 3, Mono 4
( the last one is just for verification )
Enable recording on these four tracks (if you can't select more than one, try enabling multitrack recording)
Open System Preferences, choose Universal Access (probably click 'Show All' first) and select the Hearing-tab
Make sure audio is played in stereo (unchecking the checkbox)
Keep the System Preferences open
Switch to the Finder or iTunes
Playback any song
Switch back to Garageband and check the meters on the individual tracks
( remember this is stereo, notice the number of channels with signal )
Switch back to System Preferences to enable mono (on the Universal Access prefpane)
Switch back to Garageband and check the meters on the individual tracks ( this is mono ! )
End of test ...
You will see that in mono a third audio channel is addressed, while there should have been only two in both mono and stereo.
The signal strength of channels 2 + 3 seem equal, and channel 1 looks much louder.
This difference in signal strength is very noticable when listening to channels 1 and 2 on separate speakers or headphone.
What is that playing on channel 3?
I must admit (against my original post) that this test does not proof that the signal on channel 1 is or is not mono or anything else; that requires another test.
One can of course record these channels and do some comparisons and subtractions or some other clever tricks.
Hope anyone can second this, preferably with an actual audio interface like Apogee Ensemble, Motu, RME, Presonus, Focusrite, etc.

How can I get 2 Mono Audio Channels in, 2 Identical Mono Channels Out?

I use Premiere CS6. Most of my work requires simply editing with one audio track used for the on-camera talent's microphone, adding another track for music, and then outputting BOTH of those tracks to the right channel as a mixed mono output AND the same for the left channel (an identical mixed mono output).
Otherwise, I have had problems in the past based on a user's particular playback settings/hardware/etc., and they may only be able to hear one channel or the other (only hearing voice or music). If I can put a mono mix on the right and a mono mix on the left, then I am covered.
SO HERE'S THE QUESTION: What settings do I need to adjust to accomplish this, and how do I set this up as a default for future projects? (I realize that Premiere CS6 has a lot of flexibility when it comes to controlling audio, however, I have read several help articles, and cannot find the answer to this simple question.)

You're overthinking this. A normal stereo mix with the tracks centered will do the trick. There are several ways to center the audio. Option 3 is probably the most efficient.
http://www.larryjordan.biz/premiere-pro-cs6-isolate-audio-channels/

How do I get XLR audio to play in two channels?

Hi
I have recently captured audio via an XLR port on my camera and was aware that it is was only on one channel but was hoping to copy the clip into another channel in FCE so it played back on both channels. For the life of me I cant work out hoe to do it because it shows up as two channels (one with silence) and wont let me seperate them.
Can anyone help?
Many Thanks
Adrian

You can do the following:
o - select the clip in the timeline
o - cmd-L to unlink video and audio
o - alt-L to separate the 2 stereo channels
o - select the empty audio channel and delete it
o - open the good audio channel in the viewer
o - change the Pan control to 0 (from -1 or 1)
o - now you can link back the audio and the video: select them both and cmd-L
Piero

Surround Sound Support - 5.1 multi-channel stereo

Does FMLE support surround sound - such as 5.1 6 channel stereo? If not, will it ever?

FMLE supports only mono/stereo channel as of now. If we need this support in FMLE/Flash Player, log a feture request for the same.

Converting 2 channel audio from AVCHD to 5.1 audio for bluray

Hello,
I am looking to put AVCHD video files (*.MTS) containing 5.1 audio and 2-channel (stereo) audio onto bluray. I would like to convert the 2 channel audio to 5.1 audio, so that all of the files can be encoded onto bluray with 5.1 audio in Encore. I am using Premiere Pro CS6 version 6.0.3. I have tried to bring the MTS files into Premiere Pro, and convert stereo audio to 5.1 using Audition. However when the file is exported to Encore, upon transcoding there is no audio. Please let me know what is the best way to resolve this. Also, would I require something like Surcode plugin, or are there other ways to get around this? Thanks.

"Hi seaspray07,
"Hope this clarifies."
sorry it doesn't - it confuses me and I don't get why you want to do it this complicated way ;-)
1. If you have problems try to simplify your workflow. Why do you try to work with dynamic link in Encore? This isn't the classic route and I don't see why you need it in this case.
2. In a classical workflow you load final encoded audio and video files in Encore - in this case a .m4v and a .ac3 file encoded in Adobe Media Encoder.
3. To get this files you create a Premiere timeline with 5.1 master audio and load your clips onto it.
For all 5.1 clips Premiere will create a 5.1 audio track. For all stereo clips Premiere will create a stereo audio rack.
--> Keep in Mind you can't export a premiere audio track. That isn't possible even though this would be handy in a lot of situations. You alway only export the master audio track of a timeline. That master audio track get's it input from all audio tracks of a timeline. If there is a 5.1 audio track 6 channes are mixed to the master audio - if it's only a stereo track only L, R get's mixed up to the 5.1 master.
The master audio track is what you can hear if you play back a timeline.
4. Why do you want to convert stereo audio tracks into 5.1 audio tracks in the timeline? It needs much more filesize/ ram slows down your playback and gives you a unhandy viewing with lots of emty audio channels... Why dont store and view a stereo track as a stereo track?
5. If you have placed your stereo and 5.1 audio tracks on the timeline you can export the final mix via Adobe Media Encoder with the Surcode plugin as Dolby Digital 5.1 .ac3
"I sent the audio to Audition because I wanted to modify the audio file from stereo to 5.1, and bring it back into PrPro to combine with the video clip from the corresponding MTS file..."
That doesn't make any sense... because Premiere does it automatically for you without Audition. You simply have to do nothing - just place your stereo clip on the timeline and ready.
If you want to use Audition you have to have a real reason for it - for example do extensive audio work and mastering Tasks - conform it to R128 loudness or something like that.
Does this make sense to you? ;-)

"Up Mix" from 2-channel "Stereo" audio content to 5.1/7.1 Surround

Hello,
This is a feature that I had strongly hoped would make it to Media Center in Windows 8, but didn't. Please consider this for a future update and/or the next version of Windows...
Feature Request: "Ability to Configure Stereo Up-Mix Capability in Windows Media Center and/or Windows Media Player from 2-channel Stereo to 5.1/7.1 Surround so Stereo MP3/WMA audio files output to *all* speakers in my system, not just the left and
right main speakers."
More information:
My audio content (MP3s, WMAs, etc.) are of course all 2-channel stereo format (left channel, right channel). My home theater PC outputs to my home theater receiver (which is a 2012-model Sony 5.1/7.1 receiver) via HDMI. When I play
2-channel music (MP3s, WMAs, etc.) from Windows Media Player (WMP) and Windows Media Center (WMC) both in Windows 7 and Windows 8, I only hear music from the left and right main speakers, *not* the subwoofer not the rear surround speakers.
In order for this to happen, WMP/WMC would need to "up mix" the stereo signal to take full advantage of my physical speaker configuration (as specified in my Windows' Playback Devices configuration, which Windows is able to discern from the capabilities of
my receiver). Media Center even has an Audio setup in which the end user configures the audio configuration to either Stereo, 5.1, or 7.1 yet music is still output over only two channels!
I would like to see WMC/WMP either "automagically" perform the "up mix" or provide the user with an option to enable/disable it when 2-channel Stereo audio content is played.
Too difficult? Rhapsody.com already accomplishes this with its online audio player! Note that my audio equipment has the capability of forcing output to two channels between the PC and the receiver, which my receiver will then up-mix, but this
requires physically maintaining a dip switch and also several button presses on my receiver's remote... and this physical configuration must be updated each and every time I switch between audio and movies. Too much work when it could be accomplished
automatically by WMP/WMC!
Thank you for your consideration of this feature request!
-Tretchie

The ability of windows to better control audio channel output is definitely an issue that needs to be fixed. It's really basic in this day and age where everyone and there mother has more than two speakers (i.e. 5.1 or 7.1). I understand that certain media
players, or certain decoders/channel mixers can be a workaround for this problem. But that's not enough. Today, we have many different sources for audio that are not just files on a computers:
1) Video/Movie files on computers (played through media center, MPC-HD or other)
2) MP3s/audio (played through same)
But there is also:
HTML5, webpages, Netflix, Amazon TV, Flash players, silverlight, etc. etc.
Hence why windows needs an option at the level of windows audio decoder to better control channel outputs over LPCM-HDMI! Either Mirroring L/R outputs to rear/side speakers, or, formal upmixing algorithms like Dolby Pro Logic etc., applied before
outputting over HDMI (Note I am NOT talking about bitstreaming!)
This is a trivial problem using WASAPI or ASIO. Why has windows audio not been properly updated since Windows XP!!
Recently, HTPCs and Media Centers are becoming many households primary source of entertainment.
Examples of some issues:
1) With no bitstreaming at all:
- Configuring HDMI audio "Playback device" to 5.1/7.1, and,
- Using a software decoder/media player to decode Dolby Digital, DTS, DTS-True HD, or Dolby True HD, and sending the data in LPCM over HDMI to the receiver/soundbar
-> works totally fine for outputting 5.1/7.1 surround from those sources
-> windows (i.e. software) completely fails in any ability to upmix 2.0 stereo sources to 5.1 or 7.1, or even mirror L/R channels to rear/side L/R channel for more room filling sound. Both these options should be available - upmixing with Dolby or other
for videos and mirroring/doubling the channels for music/MP3s.
Instead, windows audio sends silent channels over LPCM/HDMI when playing a stereo source. This has the added awful effect of not even letting my receiver upmix/mirror the outputs.
Hence, we need the ability to duplicate (for audio) and upmix (for videos) the L/R channels in a stereo source to the Rear L/R and or Side L/R channels through windows audio "playback devices" configuration before outputting over HDMI-LPCM!
In the day and age of 5.1 and 7.1 speakers this seems like such a BASIC feature that is missing.Otherwise, so many of us with an HTPC in our living room as our main source of media can't play music mirrored
through all our speakers, or watch videos with upmixed audio.
HDMI is the new standard, so this should really become an option.
I've done a fair amount of research on this problem, and do not believe there is any solution short of switching to optical (which I do not want to do because it can only carry 5.1) or, buying a fancy receiver instead of a soundbar with discrete rears and
a subwoofer (which I have) to do the mirroring/upmixing for me.

Convert two channel stereo podcast to mono

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