In this case, don’t expect multiple input devices. I’d like to be wrong but EasyTV build by Prolink , model: Bttv devices are collectively those PCI cards that are based upon either a Bt , Bt or Fusion A chip, and which are supported under Linux by the bttv and associated kernel driver modules. Make sure you post the findings of your investigations here and on the Linux-Media Mailing List so that bttv-cards.
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The Kodicom R and Kodicom R cards and their many clones are supported by the bttv driver from kernel version 2. Bt rev 17 at In my board the 94 is not used, the and 98 are connected to the fusino copper trace and from there to the tuner sound output. It follows the standard installation of the bttv driver for DVB as it is included in new kernels. If our Linux doesn’t include a btaudio already compiled, we can try to compile it yourself.
Bttv devices (bt, bt) – LinuxTVWiki
It’s not necessary to see perfectly the television image. To inject an external signal into the ADC using the audio tuner output in the 25 pin, cutting this pin first and wiring it outside our PC box.
According the Hercules support site http: Audio input circuitry reference voltage. Common mode voltage for the audio analog circuitry.
Analog to Digital Converter with 16 bits and Samples per second based in the BtA
Retrieved from ” https: Composite Video Baseband Signal output. Following Nyquist, this permits us to get 48Khz vt878a signals, in the best case. Once the card is installed and the system is running we will do a test to find out if the soldering is right. This article describe actions that should be done only by experienced people in electronics and potentially can damage your equipment.
I may have missed a couple of options.
Due some problems during the bttv module installation, this section has been simplified. If anyone sends me information about this fusiion, it will be very appreciated.
To get an ADC what permits us digitize at the higher frequency as possible, using “off-the-shelf” hardware. This is a general howto here. These devices can be capture-only cards – which means video is taken directly from a video source without the use of a tuner – or they can be TV cards which make use of RF tuner circuitry to receive television signals and the capture chip is there to decode the extracted video and audio.
Now it’s interesting to do a little test to explore the “neighborhood” we will have always in our experiments: EasyTV build by Prolinkmodel: We should ear again a noise signal or a sound if we have a TV channel tuned what comes from the tuner, but now it’s going out from and into our PC.
Analyzing the sound file using Audacity freewarewe can see to the left the audible sound zone up to 20Khz that comes from TV signal.
Also of interest is tb878a note on getting sound to work with a bttv device: I like it very much: This pin should be connected to an external filtering 0. If not, you should try this howto here, and if it works, add this section to your card’s article in this wiki. The power of the actual Personal Computers PCgive us the possibility to analyze and fsuion complex analog signals, but first we need to digitalize them using an Analog to Digital Converter ADC.
Unfortunately no manufacturer has used this possibility as far I know and they simply use the ADC to get mono sound from a tuner into the PC in the best case.
Save the config file, compile your new kernel, install it and restart. TV sound input from TV tuner. Juan Domenech Fernandez http: I’d like to be wrong but Bttv devices are collectively those PCI cards that are based upon either a BtBt or Bt88a A chip, and which are supported under Linux by the bttv and associated kernel driver modules.