If not, you should try this howto here, and if it works, add this section to your card’s article in this wiki. It’s the successor of the famous Bt We are doing it with our Bt! Following Nyquist, this permits us to get 48Khz width signals, in the best case. About this document, we conclude what:

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It follows the standard installation of the bttv driver for DVB as it is included in new kernels.

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. I like it very much: The digital input offers up to 20 Mbps for the parallel mode and 40 Mbps for the serial mode.

EasyTV build by Prolinkmodel: Once the card is installed and the system is running we will do a test to find out if the soldering is right.

Fusion bta – ZoneMinder Forums

The driver supports downsampling by powers fusoon two, so you can ask for more usual sample rates like 44 kHz too. I’m not sure they all use BT8xx chips.

We can call this output: 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 fusikn case.


Sample rate range is kHz to kHz. We will wire outside also the tuner audio output to be able to use this resource in the future.

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About this document, we conclude what: Another method used to help discover the hardware settings required for a bttv device is running the device under a Windows OS with video software and the BtSpy [1] [2] monitoring. If your board does not use the ADC inputs they are not connected to any copper track I suggest not to use it, because it’s very difficult to solder in a SMD chip and you will need tools that are hard to find.

Anyone can guess from which kind of signal this spectrum comes? In this case, don’t expect multiple input devices. 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 b878a PC. Now it’s interesting to do a little test to explore the “neighborhood” we will have always in our experiments: Bt878s theory, different PC models create different interferences and is important to know them to avoid getting wrong results in our experiments.


This pin should be connected to an external filtering 0. But don’t worry, if you have some load plugged and the incoming signal is strong enough these interferences almost disappear. I’m exploring new areas and finding really interesting things and I’ll public new articles soon.


Save the config file, compile your new kernel, install it fusioh restart.

Some bt capture cards have a single chip on board and four inputs on the card’s PCI riser. It’s the successor of the famous Bt The mod concept is: Make sure you post the findings of your investigations here and on the Linux-Media Mailing List so that bttv-cards.

If anyone sends me information about this point, it will be very appreciated. In my case, I observe strong signals between 0 and Hz and some “carriers” at 60, 98, Analyzing the sound file using Audacity freewarewe can see to the left the audible sound zone up to 20Khz that comes from TV signal.

This page was last modified on 10 Septemberat It’s not necessary to see perfectly the television image. It’s recommended to check if the external voltage reference capacitors are installed because they are needed by the ADC conversion. You can get the source from here btaudio Yes, fusin number of digits is correct.