Audio recording?

ANB_Medic · Post by **ANB_Medic** » Fri Jun 23, 2006 3:15 pm

We're looking to record the audio from our radios at the Fd here. I have tried a few products that seem to work well, however here is the problem. We're running 3 frequencies (one repeater, two simplex). I can set a radio up to scan and record all, and this seems to work, as we're usually all one the same channel. Haven't missed any transmissions yet. What I'd like to do, however, is have a program that timestamps the recording AS WELL AS what channel the recording is coming from. I can't see a way to do this with a /\/\ radio. I do have a BC-780 at my disposal as well though.

Anyone have a solution to this?

Todd

Rayjk110 · Post by **Rayjk110** » Fri Jun 23, 2006 3:53 pm

To do it on a Motorola Portable, connect a speaker mic model with the 9.5mm standard ear jack, and plug it in from there.

I saw some connectors on ebay to interface to the back of MaxTrac/GM300/M1225/CMxxx/Radius for audio out as well.

GEMOTO · Post by **GEMOTO** » Fri Jun 23, 2006 3:59 pm

The best way to do it is to use three different radios and three recording channels. There is no output on the Motorola radio or the BC-780 that tells the computer what channel its on if you are just using the audio output.

Ray I believe that he already knows how to get the audio from the portable.

ANB_Medic · Post by **ANB_Medic** » Fri Jun 23, 2006 4:24 pm

GEMOTO wrote:Ray I believe that he already knows how to get the audio from the portable.

Yeah, that's not the issue here. I see your point about 3 radios and 3 audio channels, but I'm not sure we can tie up that much hardware.

Rayjk110 · Post by **Rayjk110** » Fri Jun 23, 2006 4:37 pm

Well, I use freeware called WinMX, it does timestamp, has VOX record so you don't get hours of silence, only audio, but, unfortunately, no channel indicator.

Best bet may be to buy or just find some junker computers, and use them for recording purposes.

There are recorders that use PL/DPL tones, so if there are different set of RX tones on each of the 3 channels, then it would tell you what channel it was from .

ANB_Medic · Post by **ANB_Medic** » Fri Jun 23, 2006 4:41 pm

Hmmm... Never thought of using the tones. Might consider that if I have to do another one with different tones. We, unfortunately, use the same one for two channels, and nothing on the third. I'd be able to single out that channel, I guess. Can you suggest software that'll do that?

Rayjk110 · Post by **Rayjk110** » Fri Jun 23, 2006 5:49 pm

I believe that WinTone is the one that does it.

ve3nsv · Post by **ve3nsv** » Fri Jun 23, 2006 6:04 pm

How about this ?

http://www.davee.com/srpro/index.html

Still being developed but a donation will get you a Beta version.

AEC · Post by **AEC** » Fri Jun 23, 2006 6:38 pm

If you are looking for C.O.T.S(Commercial, off-the-shelf) gear, you might want to look at Eventide.

They make audio recorders that probably do just what you are looking to perform.

I don't know what the cost of these are, but I'll bet it's close to the 2K mark, maybe even less, depending on features and capabilities..

There are others out on the market, check here for more links to that type of equipment.

http://www.mrtmag.com

KB5AKO · Post by **KB5AKO** » Sat Jun 24, 2006 9:20 pm

Another suggestion is: http://www.davee.com/scanrec/

You can feed 2 separate mono channels from 2 different audio sources into 1 stereo line input on a sound card and record with any Vox recorder. You can play back and monitor both channels at the same time; or, use the balance control to discriminate which channel you want to listen to. It is possible to record 4 channels with a single soundcard. I have used this method with very good quality of audio when I used to stream scanner audio over the Internet with a server. If you need additional channels to record, simply add more sound cards.

With your scenario, I think I would have 2 soundcards installed in an old dedicated computer with 3 scanners. That would leave you with an extra input for future use. You can run multiple instances of the Vox recorder to record each channel independently. The Vox recorder listed in the above link creates a text file to log activity. It's not the best, but it is free and it works!

People are practically giving away old computers and scanners. Sound cards are very inexpensive. This will get you going till you acquire something that will suit your ultimate requirement. Since this arrangement is so simple and inexpensive, you can duplicate this arrangement for a backup system.

Victor, KB5AKO

KB5AKO · Post by **KB5AKO** » Mon Jul 31, 2006 10:42 pm

Todd,

I was just curious as to how you decided to record your audio and how it all turned out. Is the project complete?

Victor, KB5AKO

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sja505 wrote:We're looking to record the audio from our radios at the Fd here. I have tried a few products that seem to work well, however here is the problem. We're running 3 frequencies (one repeater, two simplex). I can set a radio up to scan and record all, and this seems to work, as we're usually all one the same channel. Haven't missed any transmissions yet. What I'd like to do, however, is have a program that timestamps the recording AS WELL AS what channel the recording is coming from. I can't see a way to do this with a /\/\ radio. I do have a BC-780 at my disposal as well though.

Anyone have a solution to this?

Todd

ANB_Medic · Post by **ANB_Medic** » Tue Aug 01, 2006 4:21 am

So far, I'm still sort of looking... It's taken the back burner to other projects. I am recording the repeater using Scanrec though. I'll get back on to this project as soon as I clear up a couple of others.

Todd

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