One channel in multitrack

Hello,
I'm only getting the left channel when I playback in multitrack. I'm using 2.0 on Windows 7. Is this a 64-bit compatability issue?
Thanks.

Well this is kinda weird. I checked all the channel pots and pan pots and everything looked normal. So I just started messing around with some settings in the Audio Hardware Setup. I released the ASIO driver in background and that didn't do anything.
But when I unchecked it and hit apply...it started working! Perhaps there was a problem during install?

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From Mono to Stereo or from one channel to two?

Hi,
I don't believe it's my camera's fault, because it's a newer HD camera--but for some reason the audio is only coming out in one channel.
I had to convert the file from its native .mts format to a .mp4 format and used Adobe Media Encoder CS4. When converting, I made sure to select Stereo.
Unfortunately, the audio does come out on one speaker only,even though it says Stereo.
I think I might have a misunderstanding between stereo and channels?
Does anyone know how can I easily fix this in Soundbooth? Or is there an option I am missing in Media Encoder?
Thanks a ton!
Mario

Hey!
I actually figured it out (you were on the right track with multi-tracking).
Here is what you do:
1. Right click the audio file and select "Insert Channels into New Multitrack File".
2. Delete the track in the "Audio 3" channel as it should be empty.
3. Select audio from "Audio 1" channel and just COPY + PASTE -- it should now appear in the "Audio 3" channel.
4. Copy the new audio track from the "Audio 3" channel.
4. Delete the audio out of "Audio 1" channel and move the track from "Audio 3" in it's place.
5. Delete "Audio 3" channel.
6. Go back to your original file (in the upper right pane).
7. Select all (CTRL + A) and delete the audio.
8. Jump back to your New Multitrack File, select all (CTRL + A) and copy it (CTRL + C).
9. Back to your video file now...and PASTE!
There ya go!

How to write to one channel of a task with multiple channels? (plus other things...)

So I have a USB-6009 DAQ. It has 12 digital output lines. I want one channel that is "Dev0\line0:10" which represents an address bus in my application. And a second channel "Dev0\line11" which represents a program enable line in my application.
I have tried creating two different tasks and adding one channel to one task and the other channel to the other task. The only task that worked was the task with "Dev0\line0:10". It was always the task containing that channel, regardless of the order of creation. So then I moved on to a different method. (I read somewhere that I should only create one task of each type. like only 1 DO task only 1 AO task etc... However I am also using the two analog ouputs to and have a task for each AO and they work just fine.)
I tried add both channels to one task. But when I needed to control only the address bus, I had to have some information for the other channel as well. This was a little trying, but I could configure it that way. But it turned out to be easier for me to just make one channel with all the lines and OR in the data for line11 with each write.
I just wondered if it was possible to write to one particular channel of a task and not the other channel? That would really be the ideal solution for me. especially if I could write multiple samples to the one channel while I left the other channel alone. Which brings up another complaint... Why does WriteMultiSamplePort only work if I use a DigitalMultiChannelWriter, and not if I use a DigitalSingleChannel writer even though my task only has one channel (and by the way I set up the channel as one channel for all lines)? A perplexing issue to be sure.
And no I can't just load all my samples into an array and write them all at once because I also have to manipulate the two analog outputs in between the various digital writes.
I am using NI DAQmx 7.5 and C#. I am trying to use the DAQ to program a digital switch, which has proven to be a real challenge. In push-pull mode there is too much ringing for the switches programming port to tolerate. But the switches interface is LVTTL, so I needed the 3.3V. When I changed to open-collector I had to use voltage dividers to drop down to 3.3V. But the rise time using open-collector is too slow for me the program the switch in serial mode, so I had to change to parallel. The switch has an 11 bit multi-plexed ADDR/DATA bus. So the DAQ I had chosen to use which had plenty of lines for the serial programming, now is strained to it's absolute limits by the parrallel interface. ARGH. The only output I am not currently using is the counter, and I'm going to need it if I ever want to read back from the switch. But first I have to seperate the ADDR/DATA bus from the CS line on the DIO lines of the DAQ. And I don't know for sure what I'm going to do about the voltage level translation when I have to go bi-directional. Maybe I can filter out the ringing in push-pull mode? Any thoughts on that?

Hi Saikey,
In most cases, you are exactly right: you can only use one task for one type of operation (i.e. only one analog input task in the same program). With the USB 6009, you can have multiple digital output tasks running at the same time. I was able to run a digital output program with two different digital output tasks configured for a USB-6009.
However, you stated that it would be better if you had everything in a single task for your application and write data to only some of the channels. The easiest way to do this is to modify your array of output data so that only the data to that one channel is changing. So, for example, if you keep writing a 0 to the channels that do not need new data nothing will change.
If you have to change your analog outputs during this program, you could create an event structure that would stop and restart the analog output tasks without changing the digital output data. I hope that you find this information helpful.
Regards,
Hal L.

The headphone jack on my iPod Touch Gen 2 is intermittent. I get sound sometimes out of one channel and sometimes both depending on how I hold the headphone jack. Is this a costly repair?

The headphone jack on my iPod Touch is intermittent. I gat sound out of one channel or both depending on how I hold the jack. It is making intermittent contact. Is this a costly repair by Apple? Can I do this repair myself?
Thanks

Here is a third-pary place. Google for more.
iPhone Repair, Service & Parts: iPod Touch, iPad, MacBook Pro Screens
Apple will only exchange your iPod for a refurbished one for:
Apple - Support - iPod - Repair pricing
Here are instructions for doing it yourself
iPod Touch Repair - iFixit

Error using pretrigger when capturing more than one channel

I am having problems acquiring data with pretrigger samples when capturing more than one channel, using NI-PXI-6071E hardware and Labview's Analog Input VIs (Legacy NI-DAQ).
My goal is to trigger on one signal, while capturing another. Unfortunately, I cannot use the PFI0 for external triggering, as our cables/hardware have already been built, so I must use an analog input channel as the trigger. I understand that to do so I must capture both channels, and the channel that I wish to trigger off of must be the first channel in the list.
If I trigger and capture on the same channel (tried 1-4) then it
works great, regardless of the number of pre-trigger samples set. If I
capture more than one channel (passing the trigger channel first), with no pretrigger samples set, then triggering and capturing both work fine. However, if I do the same with the pretrigger sample > 0 I get the following error:
Error -10621 occurred at AI Control. Possible reason(s):
NI-DAQ LV: The specified trigger signal cannot be assigned to the trigger resource.
I don't se any such limitation explained in the user manual, and searching the forum, I have found a few other people that had the
same
problem
but they did not have solutions. Any ideas?
Solved!
Go to Solution.

I'm sorry for double-posting this. I was trying to post it in the DAQ board and it kept ending up on the LabView board.
If moderators have the ability to delete this thread you are welcome to do so.

In FCPx how do you invert the phase of one channel of audio?

I talked with my engineer friend and he listened to and tested the audio on my project. He said one of the channels was out of phase and that is why I'm getting no audio on my wireless audio recording being played back on android phones. He didn't know how to tell me to access fcpx to make the change to the one channels phase. Any help is greatly appreciated!
p.s. I want to thank Luis Wequeira and Tom Wolsky for getting me to this point.

IF the problem is inverse phase, all you need to do is switch either the left or right, which will put whichever one you switch back in phase with the other one.
HOWEVER, as a test, if you hit the "Make Mono" button in the Gain effect BEFORE switching the phase of either channel, it will combine the two channels. If they completely cancel out during playback, phase was your problem with the phones. If it doesn't cancel out though, your problem isn't phase. Again, I doubt a complete lack of audio is due to phase issues, but test it out.
On a more technical level, neither channel is actually out of phase when people talk about two channels being 180 degrees out of phase. One of the channel's polarity is reversed, meaning the voltage, bits, or whatever, is increasing when it should be decreasing and decreasing when it should be increasing. The audio channel is doing the mirror image of what it's supposed to be doing. Being out of phase actually refers to one of the channels being moved in time in relation to the other channel, which is a different thing entirely.

How do I put all my live feeds into one channel? I don't want to have to cick on each feed source separately.

How do I put all my live feeds into one channel? I don't want to have to click on each feed source separately. Instead of one feed per website I want just ONE feed for all my sources together.

Hi there old45,
You may find the information in the article below helpful.
iTunes 11 for Windows: Change where your iTunes files are stored
http://support.apple.com/kb/PH12365
Consolidate your files in the iTunes folder
You can consolidate all the files in your library in the iTunes folder—for example, to make it easier to move your library to a new computer.
Choose File > Library > Organize Library.
Select “Consolidate files.”Files remain in their original locations, and copies are placed in the iTunes folder.
To create folders (Music, Movies, TV Shows, Podcasts, Audiobooks, and so on) inside your iTunes folder, and place all your imported media files in the appropriate folders, select “Reorganize files in the folder ‘iTunes Media.’”
Locate your iTunes files
Do either of the following:
Find out where a file is stored: Select the item in iTunes, and choose File > Get Info. The path to the file is shown at the bottom of the Summary pane (next to Where).
Show the file in Windows Explorer: Select the song, and choose File > Show in Explorer.
-Griff W.

Analog Source Triggering with more than one channel in channel list

Hello,
I am trying to use an analog reference trigger with a channel list that contains more than one entry using a
M Series 6289. I am aware that this is generally not possible to have more than one channel in the list due to hardware limitations. I was hoping if some sort of workaround exists.
I am using the NIDAQmx C API to control the card.
Using a second card that is syncronized via RTSI should
allow me to use an analog reference trigger to control multiple analog IO channels ... Right ???
Thanks for any advice!
Best regards
Peter

Hello Peter,
If you look at the NI-DAQmx Help, Analog Triggering Considerations for E Series, M Series, and S Series Devices section, it says that to pause multiple channels with an Analog trigger, you must wire that signal to APFI0 or APFI1. Therefore, it is possible to perform this operation.
If you are sharing the AI Sample Clock across RTSI, then you would be able to stop multiple AI channels across multiple devices with the one Analog Reference Trigger.
I hope this helps,
Sean C.

Replace one channel by another on only one layer, leaving the others intact?

Hello. In a CMYK image, I need to turn on only one layer one channel completely into another, while the others remain intact. The M channel (the M on that layer) contains information, but I can't print M in this place. I want to change it into an equal amount of K (or into C, in the present case, or even into a mixture of the two). I know how to do this to an entire image (change into greyscale, duotone or whatever may apply). But since I need this to apply to only one (or a selection of) layer(s), leaving all others intact, this is not an option here. I'm sure there's a way to achive this, but I can't find it. Any advice would be much appreciated.

bustamant wrote:
hello, thanks for your replies. As far as I understand, Channel Mixer (i.e., an Adjustment Layer containing a Channel Mixer applied to the layer in question) allows me to reduce one channel to zero,
You are completely correct up to here...
Then choose K as the desired output channel at the top of the palette and slide the M (source) slider to the desired value. You can choose more output channels by going to each output channel in turn.
The way it works is slightly confusing at first, but in a nutshell, you choose your output channel first, then mixture of sources. Then move to another output channel and the sources will be at the default position for THAT output channel only. Each channel has a set of source channels assigned to it.
Default; black output channel = 100% black source, 0% CMY
So your example is black output = 100% black source plus 100% mag source (although I expect you are going to change black source to 0)
AND magenta output = 0% Magenta 0% CYK source (no mag output at all)

How to make a synchronous acquisition of two analog signals with a one channel DAQ ?

Hi !
It is the first time I use Labview. I have just made some easy VIs, and now, I do not know how to deal with my problem...
My problem : I have only one acquisition card (DAQ Ni 6034E) and I would like
to acquire simultaneously two analog signals. It seems to be possible, in a quasi-synchronous acquisition if the card acquires one point of the first signal, then the first point of the second signal, then the second of the first signal, and so on ... I thougth that I could made two sequencies with a VI of data acquisition in each sequency, with the AI MULT PT. But with this, I think that I will lose the precision of the sampling frequency. And I have to know the sampling fre
quency ...
Thanks for your help !
Carline

Hi Carline,
A PCI-6034E is a low-cost board, which only has one Analog to Digital Converter (ADC).
With only one ADC you can't acquire different channels at the same time. That's why you find a multiplexer before the ADC in this type of board. This enables you to acquire multi-channels at the same rate quasi simultaneously. The samples of the different channels will be interleaved as it is explained in the following knowledge base :
- http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/9379ea091c264b7c86256bc90082ca5d?OpenDocument.
With this method, the sampling frequency is the same for all channels. The sampling frequency of one channel is determined with the "scan rate" parameter. There is only a small delay between the samples
of each channels. When you perform an interval scanning acquisition, this delay depends on the "sample rate" that you specify. To have more informations about this terminology, please refer to the following KBs :
- http://digital.ni.com/public.nsf/websearch/4D1435DF82EF494186256D8A006DD6D4?OpenDocument.
- http://digital.ni.com/public.nsf/websearch/4D1435DF82EF494186256D8A006DD6D4?OpenDocument.
To easily perform such a multi-channels analog acquisition, you can use the VI named "AI Acquire Waveforms.vi". You also can use an example provided with LabVIEW. You just have to browse the NI Example Finder in "Harware Input & output >> Traditional NI-DAQ >> General".
Best regards,
Benjamin
National Instruments France

How get one channel of data from two-channel audio file?

I need to either convert a 2-channel audio file to 1-channel or else get just one channel of data (does this lose some sound?) for a calculation. How would I do that?

In terms of a loop over byte[] data, double[] left, double[] right...
8-bit mono
for (int i = 0; i < data.length; i += 1) {
left[i] = (double)data;
16-bit monofor (int i = 0; (i*2) < data.length; i++) {
left[i] = ((double)data[2*i] << 8) + (double)data[(2*i)+1]);
8-bit stereofor (int i = 0; (i*2) < data.length; i++) {
left[i] = (double)data[2*i];
right[i] = (double)data[(2*i)+1];
16-bit stereofor (int i = 0; (i*4) < data.length; i++) {
left[i] = ((double)data[2*i] << 8) + (double)data[(2*i)+1]);
right[i] = ((double)data[(2*i)+2] << 8) + (double)data[(2*i)+3]);

6602 more than one channel

"i cant choose more than one channel on the daq assistent vi to measure.
how is it possible to measure more channels?
my other measures in this vi are done with the traditional daq.
i would like to do this with the 6602 too.
please give me an easy vi or explanation.
is it possible to combine traditional daq and daqmx?"

You're right!
There are two alternative solutions I can think of.
1. Go into MAX (I use v3.1) and create DAQmx global channels for each counter. For example, create CounterFunction0 for channel zero, CounterFunction1 for channel 1, etc. To do this go to Data Neighborhood>>NI-DAQ Global Channels and right mouse click and selct create new NI-DAQmx channel.
After creating these channels, create a NI-DAQmx task.
To do this, go to Data Neighborhood>>NI-DAQ Task and right mouse click and selct create new NI-DAQmx task. When creating the task, you can now select multiple global channels with the shift key. Make sure you click on the global channel tab to enable the view of the global channels you just created.
2. Without usnig Max you can
create a listbox in the LabVIEW front panel and select whatever counter channel you need. You can then convert what is selected into the proper counter string (Dev%d/ctr%d)and then pass this string into the taskID input. Remember, the taskID input in the DAQmx VIs can accept string inputs.
I hope this helps.
Robert

How can I delete one channel of stereo audio?

I am using FCPX and I need to delete one of the stereo channels. All I am seeing on the screen is one waveform and one channel. How do I see both channels?
Thanks

Change it to dual mono and use expand audio components. You can adjust the channels separately or switch either off in the inspector.

Passing parameters from one channel to another

Hi,
I was wondering if it is possible to pass parameters or values from one channel to another, for ex. through JSP, etc.
Thanks, Pablo

try these topics
http://swforum.sun.com/jive/thread.jspa?forumID=80&threadID=19222
http://swforum.sun.com/jive/thread.jspa?forumID=80&threadID=23051
and maybe
http://swforum.sun.com/jive/thread.jspa?forumID=80&threadID=19222
I use javaBeans or SSOToken to exchange parameters between portlets.

ONLY ONE CHANNEL OF AUDIO WITH SONY PMW-200

Hi,
When I automate to sequence using video shot on my Sony PMW-200 I only get one channel of audio, when the preset in Premiere clearly states 8 channels of 24 bit audio. If I drag a clip to the timeline all 8 channels are there, but then I have to trim the beginning and end of each clip in order to do transitions, which would take forever on a wedding video. There must be other PMW-200 users who have this same problem. I am shooting in UDF mode 422 at 50 mb/sec on the Sony and just updated my Premiere CS 6.
Thanks,
Ed

similar question, I found a thread that may solve your problem: Sony PMW-200 file import into Premiere Pro CS6 only get 1 Ch. audio, you can go for a look. Or you can try some converters to help you. Handbrake, any video converter, ffmpeg,imixmxf, transcode them first, then reload into premiere.

One channel in multitrack

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