• Get involved.
    We want your input!
    Apply for Membership and join the conversations about everything related to broadcasting.

    After we receive your registration, a moderator will review it. After your registration is approved, you will be permitted to post.
    If you use a disposable or false email address, your registration will be rejected.

    After your membership is approved, please take a minute to tell us a little bit about yourself.
    https://www.radiodiscussions.com/forums/introduce-yourself.1088/

    Thanks in advance and have fun!
    RadioDiscussions Administrators

audio distorted going into soundcard from console

G

Groove1670

Guest
Got a Dynamax MX8E console. Overdriving output from console to sound card input :(... what is the most cost effective way to remedy this. Also it appears the whole board has been wired wired for mono, (It is a stereo board). Does anyone know of any hidden jumpers on this board.

Thanks. :
 
musiconradio.com said:
Got a Dynamax MX8E console. Overdriving output from console to sound card input :(... what is the most cost effective way to remedy this.
Click to expand...

The very first thing to do is, make sure you are using the correct input jack on the sound card. Some cards have two inputs. Typically one input is for line level audio, and the other is for Mic level. The Mic level inputs have additioanl amplification and will severely distort line level audio.

R
 
If there is no line level input, as with my laptop, you will have to build or buy a pad. Either an L pad or T pad should work for you.
It is basically a resistance network designed to drop a specific decibel amount.

One resistance across the audio lines "bleeds off" excess level, matching the lower impedance source, then a series resitance
which follows drops more audio, and matches to the higher impedance microphone input.
 
Thanks,

We have tried both the line and mic inputs. is there anything self contained that we can purchase. How bout a distribution amp?
 
I had a different Dynamax that I think was similar (12L). Mine had pots to adjust the different output busses (pgm, air, aud, mono). Does yours have adjustments there?
 
Well, your Dynamax board is going to be a high level, balanced output board. You did not say what your sound card was, but if it's a standard soundblaster type, then even the line level input will be configured for about a -10dbm unbalanced input. The board is most likely cranking out a +4dmb balanced output. To properly match this situation up, you are going to need some sort of matching interface, such as the Henry Matchbox or similar. Ebtech also makes some nifty units called "Line Level Shifters" that require no power of their own, and transform bal to unbal, +4 to -10 and vice versa. Check with your favorite supplier, or just call my buddy at BSW, Gary Beebe. 800-426-8434
 
The Henry Engineering "Matchbox-HD" would be an out-of-the-box solution for you... It is a bi-directional device, so you can hook up both the inputs *and* outputs from the PC. Can be found at any broadcast distributor...
 
I agree with the others that you probably have a balanced +4 balanced output driving a -10 unbalanced input on your audio card. You will need an interface to correct the distortion. I too recommend that you use the "Henry Engineering Matchbox." They are reasonably priced and very well built. We're using a couple of these at our station for an installation similiar to yours.

Henry Engineering also offers OUTSTANDING tech support, should you ever need it.

Look at this:

www.henryeng.com/matchbox.html

Good luck....
 
Thanks for the info. It helped. got the console back in stereo.
 
Well I decided to get back to working on my dynamax console. Got all the audio input level issues solved (sort of). After the console warms up, there is distortion on low And mid frequency audio. I'm thinking it is a bad chip or cap. Has anyone had a similar issue. Thanks.
 
What does you connection from the board to the computer consist of now? Do you have a Matchbox or similar wired in between, or are you using a resistive pad?

Is the distortion on-the-air, or just the computer? You may still be overdriving the computer line input.

Make sure you don't have either the + or - outputs of the board connected to ground. That will cause bad things to happen.
 
The problem is with any input on the audition side. I have tried a mic, CD player, etc... The same source sounds fine in Program, the problem is on the audition side. ?
 
You might have damaged one of the output chips on the audition side. Luckily, they're easy to change. Make sure the output lines aren't tied to ground, and mind static electricity...I've blown chips before while handling input cables.
 
Status
This thread has been closed due to inactivity. You can create a new thread to discuss this topic.


Back
Top Bottom