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thricia_12
Apprentece
7 Posts |
 Posted - Oct 25 2005 : 05:28:16 AM
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is der anyway that i can build a usb telephone recording device? can i replace the phone jack by a usb?help me guys, i need to build this one..thanks!!!
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Oct 25 2005 : 2:53:16 PM
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You can't connect the high voltage of a telephone line to a low voltage USB computer port.
You can't feed analog audio into a digital USB port.
I have a portable MP3 player/recorder that will record audio digitally on its hard drive. It has very complicated electronic circuits to convert the audio into USB digital data.
Wait a minute! Its USB port is for downloading audio digitally, but it can't transfer its data to my computer. It also doesn't have a transformer or something to directly connect it to a phone line.
Have you seen the complicated stuff on a sound card for a pc? You will need to design a circuit as complicated or more to convert audio to USB.
Instead, why not connect a transformer to the phone line and connect the audio output of the transformer to your pc's sound card?
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thricia_12
Apprentece
7 Posts |
Posted - Oct 27 2005 : 02:32:34 AM
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do you know how to convert audio to usb?i know this is a complicated but i need to build this one really!!! the usb circuit will have its own soundcard, is this possible? do you have any idea on how to do this?i need your help!!! thanks.:)
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cirvin
Nobel Prize Winner
USA
1542 Posts |
Posted - Oct 27 2005 : 06:25:53 AM
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The easiest way to do this would be to buy a USB soundcard and hook the audio part of this circuit to it.(omit the relay):
http://www.aaroncake.net/circuits/phonetap.htm
In order to build a device that converts audio to a useable USB signal you would have to interface an Analog to Digital Converter to a microcontroller. Then you would have to write a driver for the computer so it can understand what is plugged into it. You'l spend much more time, energy, and money doing it yourself as opposed to just buying the part.
Why not just use the computer's soundcard?
http://daxter12.topcities.com <Updated:July |
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thricia_12
Apprentece
7 Posts |
Posted - Oct 27 2005 : 9:49:58 PM
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thanks for the replies, in this project i need to build a usb recorder device that is connected to phone line and usb port of the pc,so the device will transfer the conversation through the telephone and save it to the computer...is this possible?it will directly save it to the computer not to the tape recorder.. thanks!!
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Oct 27 2005 : 10:18:10 PM
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Have you seen the complicated stuff on a sound card for a pc? You will need to design a circuit as complicated or more to convert audio to USB.
The parts are available if you order at least 10,000 of them.
Good-luck.
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 28 2005 : 08:59:39 AM
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Another possibility is to just buy a USB voice modem. Problem solved. 
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thricia_12
Apprentece
7 Posts |
Posted - Nov 01 2005 : 8:17:06 PM
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usb modem? do the usb modem has a feature that can save telephone calls?
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thricia_12
Apprentece
7 Posts |
Posted - Nov 09 2005 : 10:48:23 PM
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hi aaron,if i buy the usb modem,what benefit i could get in it? thanks!
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Nov 10 2005 : 09:29:47 AM
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A USB voice modem, with the appropriate software, will be able to record phone calls.
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usb recorder
