Digital to analog converter

I think this question will be for a tech. I am trying to hook up a converter to a TV that will then be used to transmit the audio from the TV to a device that will send it to a pair of hearing aids. I am using a Gefen TV GTV-DIGAUD-2-AAUD converter. I have hooked this up to my Toshiba at home and it works fine. However, I am trying to use it with a Toshiba DVD/TV combo model # 19SLV411U and it will not send the audio signal to the converter. It is set up the same way as when I used it at home. The only difference is that I'm using a DVD instead of just watching TV. I've tried changing the audio setup in different ways but it still will not work. It says it supports audio sampling frequencies 32, 44.1, 48 and 96khz. Is there another converter that will work? I am trying to use this to demonstrate this hearing aid feature in my office. Will it work with a TV signal rather than a DVD? Any help would be greatly appreciated!! Thanks!

Yes, that TV will need one.
- Peter

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Do we have Digital to Analog converter with high current output?

Do we have Digital to Analog converter with high current output? I need 8 channels and each channel has at least 100mA current output.Thanks!

I have never heard of such a device. You will probably need to follow the D/A with an amplifer for each channel.
What is the voltage range and speed required? Any special protection requirements (such as current limiting)?
Lynn

Using Air Port for music...do I need a digital to analog converter

I want to play my iTunes library on my old stereo using my iPod Touch as a remote control (that works well with my Bose Wave Radio). My old stereo is an analog system. When I plug the output of my Air Port Express into my stereo though RCA cable, do I need to use a Digital to Analog Converter (DAC) or is there a DAC as part of the Air Port Express???
Many thanks,
Twinz

After doing a little more digging, I find that using a Toslink cable out of the AirPort Express and into a quality external DAC, and then using RCAs to connect to my pre-amp will get much better results out of my stereo. Evidently the DAC in the AirtPort is not great quality. So, what I'm going to do is hook up the stereo through the AirPort and listen. If it sounds bad, I'll spring for a decent external DAC. Many thanks!

Fast multi-channel digital to analog converter

Hello,
I’m a PhD student working in a mechanics laboratory in France (LMT Cachan) and one of the goals of my thesis is to control a hydraulic testing machine using digital image correlation techniques. In order to do this, I need to take a photo of a sample, process it, extract 4 parameters and send them to the testing machine. This process needs to be repeated at a frequency of approximately 80Hz. We need a device to send these values from a Linux computer to the 4 analog entries of the machine (0-10V, 0.5 mA) by coaxial BNC cable. We managed to do this for one channel using an USB connected oscilloscope by sending a continuous current by changing the offset using C++. The problem is that this solution is too slow and has only one channel.
For this we would need a device that has a viable and fast connection (Ethernet, PCI, even USB if recommended) that can send data from a Linux computer (ideally using C++) with a latency of around 1ms, frequency of at least 100Hz, precision of 0.1% and on 4 synchronized analog outputs. Given that I am not particularly specialized in the field of electronics, researching such a device among the large quantity of items produced by your firm proves to be a difficult task.
I would like to know if you have a product that fits our needs and if similar purpose programming has already been done (or could easily be done) to send data from a linux computer to analog outputs (using C++ ideally).
Best regards,
Ionut Prisacari

Hi,
I advise you to call our Sales Services 01 57 66 24 24
They can provide you some advise and find the correct DAQ Board. Nevertheless starting with your requirements, most of them can work in your case.
Thanks

I am designing successive approximation ADC designed using LabVIEW I need DAC digital to analog converter block please give me DAC code

help me

Hi,
To send your boolean array bit by bit you'll have to enter your array in a For Loop to unindex it.
You could use your counter output, if there's any, to generate the clock for the D/A, if not, you'll have to make it programatically.
Dario Camargo
NI Brazil
#1197019

Driver for VM3608A: DIGITAL-TO-ANALOG CONVERTER

Hello,
can someone help me to find a driver for the VXI-Card VM3608A? Im using
Labview 6.02 and the VXI-Cards are running in a firewire-controlled frame.
On which sites can i search for a driver?
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Martin

Dear Martin,
Many instrument drivers can be downloaded from NI by going to http://www.ni.com/devzone/idnet/ and selecting "Search for a Driver." In this case, the driver for the VM3608A is not available on the NI web site. This driver is available from VXI Technologies, the manufacturer of the VM3608A. You can download the driver by going to http://www.vxitech.com/download.asp and selecting the appropriate instrument driver.
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www.ni.com/support

Audio Digital Analog Converter bit resolution

Hello ! i´m looking if I can use IPHONE to make my investigation project. Someone of you know which is the audio Digital Analog Converter bit resolution for a normal audio conversation? 13bits? thank you very much

MonoPrice.com has a digital to analog converter for around $25 although it looks like it is on back order. I would give them a call anyways. Don't get fooled by their prices, they are fast and cheap but good and the place to buy all your audio and video cables. I wired up my sisters entire home theater for less than a quarter of what I payed for my first HDMI cable which I didn't pay much for either.
http://www.monoprice.com/products/product.asp?cid=104&cp_id=10423&cs_id=1042302&pid=6884&seq=1&format=2

Apple TV great on older DVI TV w/ simple digital to analog audio converter

I bought a Digital to Analog Converter (DAC) for $59.95 to convert optical audio (via Toslink) to RCA analog stereo jacks.
Device I purchased was a DAC-2016 S/PDIF to Analog RCA cnvt.
Very compact!
Also, bought a Belkin Toslink cable for $19.95 at the local Apple Store.
Works perfectly with my HDTV that only has DVI and Component inputs (plus coax, component, etc.)
I just bought it last month.
Googled it a minute ago. Price seems to have gone back up to $89.95. (List price is $99.95.) Not available right now. Maybe Apple TV caused it to sell out.
Let me know if any of you can find this item in stock anywhere or have another solution. I have a friend who has an older HDTV with DVI inputs.
Thanks,
Alan

Finally realized that it was the Gefen box not working!?!?!? I went to the store and asked them to try it out and they had trouble too. Another Gefen was tried and it worked. They all said they had never seen a defective one before. Thanks anyway for your help. It was appreciated!

Macbook Pro as optical to analog converter

I've noticed that my Macbook Pro has an optical/analog audio in and an optical/analog audio out. My HDTV has only an optical out, and my home audio system has only an analog (stereo) input. Can I use my Macbook Pro as a digital to analog converter? That is, if I connect my TV to the Macbook Pro using an optical cable, and connect the computer to the home theater system via RCA cable, will I get sound? If so, will the Dolby output from the TV also be converted?
Thanks for your input.

I'm pretty sure that the only way to do this would be by hacking something together with VNC, which sends a desktop frame-by-frame across a network connection. Because it goes over the network, it's not even in the same league speed-wise as DVI. In fact, even when I connect my PowerBook to my MacBook Pro over gigabit ethernet, a VNC connection is too slow to play even a modest video.

32" Toshiba Regza - can i used digital to analog optical audio converter?

32AV700A - 32" Toshiba Regza
Can I use digital to analog optical audio converter?
My objective is not to use LCD TV internal speakers as it's really bad since the the speakers are on the back. If i use the digital optical cable and plug in to the converter, can all my DVD and other devices connected to the LCD TV play to 1 external audio source instead internal speakers?

Thanks for the suggestion.
I got a bit more noise but still no coherent sound.
What next?

Quality capturing with FCP & an analog converter?

i am making VHS(PAL) -> DVD transfers using a Canopus ADVC110 analog converter with iBook G4 with Tiger. previously i was using iMovie HD in capturing which worked fine and gave me good quality DV files, but since i needed more editing possibilities i turned to FCP. i was surprised to find out that it looks like i cannot maintain the quality nowhere near where i've used to since FCP (i have FCP 4 only unfortuntely) only produces me small-sized Quicktime Movie files with mediocre quality compared to the huge but good-looking DV files i got with iMovie. the quality of these is simply way too low for me. and i cannot use iMovie HD for capturing and then import the files to FCP because FCP 4 doesn't understand iMovie HD projects. now am i just being stupid and missing something with the FCP settings here? or is updating my FCP a solution?
i don't need to work with DV cameras, just with VHS->converter->iBook combination.
i'd be very grateful for quick tips/solutions.

A few points: [cliff notes version: get a monitor]
1. Without a TV (aka NTSC/PAL Video Monitor) to see your footage sent out via Firewire, you have no way of know what your footage looks like. QT may do a better job of representing DV stream files, but it in no way means they are of higher quality.
2. Capturing in Final Cut Pro IS computationally intensive. Here's why. DV stream, (the stuff iMovie uses) is a direct write out of the muxed (mixed audio & video) as it is written on the tape by your camera. FCP (or more accurately Quicktime) takes that Muxed stream and separates the audio and video into individual streams IN REAL TIME. If the computer can not keep up, dropped frames or corrupted files are the result.
3. This demuxing does not change the QUALITY of the video. The file started as ones and zeros and remains as ones and zeros. There is nothing to convert at this point - it still is a direct digital transfer - just pulling apart the strings.
4. Playing these more complex Quicktime files places greater demands on your system than iMovie's DV stream.
5. The people who wrote FCP recognized that displaying a high data rate file on a limited computing platform may overwhelm that platform. So, in response, they designed FCP to create a low resolution proxy for the display.
6. Why do this? Now listen closely .... because FCP is designed as a Professional application and professionals (or serious dilettantes) will invest in the proper equipment to monitor the audio and video components of their work This is how a SOFTWARE based editing solution can compete with very, very expensive hardware based systems. FCP is quite scalable. It will run on the minimum configurations but really works much better with more horsepower.
Now, the limited ram, video speed, hard drive capacity and frontside bus speed of your computer is being tested by this process and is not holding up well. A second hard drive to be a dedicated media drive will help. More RAM will help. A faster CPU will help. A machine that is configured from the beginning to run these kind of applications will help.
I'm not trying to be mean here, just trying to explain the complexity of the situation. I really do hold the Apple marketing people responsible for over selling the program. It is NOT rocket science, but does demand a much greater understanding of technology than most people I know to able to actually grasp.
good luck,
x
[cliff notes version redoux: get a monitor]

How good is the Airport Express inbuilt Digital to Analogue converter?

How good is the Airport Express inbuilt Digital to Analogue converter?
I have just purchased a 2012 dual band Airport Express which has the combined optical/3.5mm analogue jack audio output.
This is to connect to my hifi seperate amplifier, which does not have an optical input.
This gives me a couple of options
a) just use a standard 3.5mm jack to phono cable (and use the built in DAC in the airpor express)
or
b) purchase a seperate DAC to convert the optical from the Express into phono and connect that to the amplifier
I will be sending 250-320kbps music to the airport express wirelessly.
Will I see much/any benefit in sound quality with option B vs option A?
I ask because option A is free (I already have the cable) and option B will be around £20-£30 depending on which DAC I were to buy (I would also need a new TOSlink optical cable).
These are the sort of DACs I was looking at.
Thanks, Chipstix

How good is the Airport Express inbuilt Digital to Analogue converter?
Please check out this stereophile article on the earlier AirPort Express. I understand that the newest version may use basically similar audio hardware.
I will be sending 250-320kbps music to the airport express wirelessly.
The AirPort Express Base Station (AX) works only with iTunes v4.6+ and is limited to music files that iTunes can read; ie, 16-bit data only. (An exception is you can use a third-party product like Rogue Amoeba's AirFoil to stream other non-iTunes sources.) These data, though, can be in any file format that iTunes recognizes, from lossy MP3s at the low-quality end of the spectrum to Apple Lossless and lossless AIF or WAV files at the high end. It is also important to note that the AX functions only at a 44.1kHz sample rate. When you play 32kHz or 48kHz data, iTunes sample-rate-converts the data in real time before sending it to the AX.
iTunes uses a QuickTime CODEC to convert audio files to Apple Lossless, and then, uses AirPlay to send them to the AX. In turn, the AX uses built-in software that converts the Apple Lossless to an Encoded Digital Audio format. From there, digital audio is sent to a optical transceiver to convert the electrical signal to an optical one before sending it to the innermost part of the audio port. As you already know for analog, the AX has a built-in DAC to convert the Encoded Digital Audio to Analog which is sent to the same audio port.
One operational glitch is the fact that, as the AX doesn't have a local clock circuit, when the incoming data is interrupted, as it is when you change songs in iTunes, there is no longer a digital output to feed the DAC, which loses lock as a result. Using an external DAC, which may offer better audio performance, may have issues with this glitch. Some DACs are more sensitive than others.

Black magic SDI to analog converter box code issue

Hello im using an SDI to analog converter box from black magic and since i was using it to test some other stuff I guess i got the code worng now but don remember what it was. As of right now its only displaying some lines although i can kinda see through and im seeing what the back ground is and it its what im trying to display.
This topic first appeared in the Spiceworks Community

I wanted to let you know that I made a practice dvd today, sampling edited clips from four different sources of imported vhs video--some of it 16mm dubbed to video around 20 years ago--into iMovie. I worked in the update of 6 to see if the application had stabilized at all. I've been working only in 5.0.2 recently.
I was pleasantly shocked at how much better the video quality was than on the computer--as you foretold. I really couldn't tell a visual difference from the source videos. What a relief! But do you work with that disparity, the difference between computer and TV, without a live TV monitor as you go? It's hard to make decisions on the basis of how it looks on the computer.
Other encouraging news: the garble around the edges didn't show at all on the TV screen. In the meantime, I'd been trying the plug-in you recommended. I'm glad I won't need to it for all this video after all, but I'm curious to experiment more with it. Any other plug-ins you'd recommend?
Thanks again for your generous response.
On a roll,
BnB

Dual Monitor (digital vs. analog) and LR2

I have both digital and analog on my video card. Where should I place the
main program on the digital or analog monitor?

> Where should I place the main program on the digital or analog monitor?
That would depend entirely on the quality of the monitor. Let us know more ... including how you intend to calibrate either (altho today's calib systems can generally do either, but sometimes not both).

Array of different (digital and analog) values into multigraph

Hello everyone,
So I have an array with a timestamp on the first column, either "off" or "on" string on the second column, and a number value string on another. The columns are based of variables that reads data based on an update rate. My question is, what is the easiest way to separate these values into a digital and analog graphs. This is because the number values are so high that the "off" and "on" signal is being pushed down as the y-axis auto-scales. I'm hoping that I can use a multigraph, but the multigraph puts the data in one graph (since it's one array).
Any suggestions or help is appreciated.

Hi jachy25,
Below is a link to a KnowledgeBase article that goes over how to use stacked plots in LabVIEW.
http://digital.ni.com/public.nsf/allkb/21E8163F259DA2058625703B007511AA
The second link contains a lot of general information on configuring graphs and charts in LabVIEW, and is a useful document to have when configuring plots.
http://zone.ni.com/reference/en-XX/help/371361L-01/lvconcepts/customizing_graphs_and_charts/
I hope this information helps!
Regards,
Kelly B.
Applications Engineering
National Instruments

Digital to analog converter

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