Film-Tech Forum ARCHIVE: Audio Inputs to USL 105/195

This is topic Audio Inputs to USL 105/195 in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Ian Bailey (Member # 1752) on 11-16-2005, 01:07 AM:

I have the audio for my on-screen ads going into the "EXT" input of the Ultra Stereo 105/195.The audio is coming direct from the sound card of a PC(Volume on PC turned up full) but the sound level is not loud enough without having to adjust the main fader which we don't want to do all the time.There does not seem to be any way of increasing the volume like you can with the Non-Sync trim pot.Any ideas on how to overcome this problem?
Thanks
Ian

Posted by Monte L Fullmer (Member # 2797) on 11-16-2005, 01:49 AM:

Have you got your sound properties turned up all the way in the control panel of the PC since you mentioned that you've done some adjustment with the trimpot above the volume control of the 5/95(is this the actual model number for this unit than the one you listed per any chance?)

You may have some resistors place in line with that input with the 5/95 since the sensitivity of the N/S is quite high and the resistors cut down the input current of certain N/S source devices.

thx-Monte

Posted by Ian Bailey (Member # 1752) on 11-16-2005, 03:23 AM:

Hi Monte
Yes the volume of the PC is turned to full.
This USL is a 105/195-a newer model to the 5/95.
The trim pot is used for the Non-Sync input which I have my background music playing through.
The audio for my on-screen ads is connected to the EXT input which does not have a trim pot for adjustment.
I'm not sure whether the EXT input has a higher input impedance than the Non-Sync which would cause my reduced volume or whether i need a small pre-amp to boost the signal to the EXT input.

Posted by Mark Gulbrandsen (Member # 72) on 11-16-2005, 07:13 AM:

Then you may have to use an inexpensive external mixer of sorts to boost that level and allow you to have contol of that level seperately. That input needs a line level signal and apparently your audio card is not capable of delivering that.

Mark

Posted by Mark Gulbrandsen (Member # 72) on 11-16-2005, 07:16 AM:

Then you may have to use an inexpensive external mixer of sorts to boost that level and allow you to have contol of that level seperately. That input needs a line level signal and apparently your audio card is not capable of delivering that. If you want to use the non-sync input then just place a 50 to 100k stereo pot in the line to have control of that, mount the pot on a single rack plate above the processor.

Mark

Posted by Louis Bornwasser (Member # 3063) on 11-16-2005, 09:30 AM:

My experience is that computer audio output is a bit low (we locally rebroadcast internet audio on FM). The mixer you describe will work perfectly. Alternatives are any form of stereo line amplifier such as an RDI #STA-1 with 20 db of gain. www.rdinet.com Louis

Posted by Ian Bailey (Member # 1752) on 11-16-2005, 08:26 PM:

Thanks guys-I thought I may need an in-line amplifier.

Posted by Michael Schaffer (Member # 1204) on 11-17-2005, 12:10 AM:

Most media players (WMP, Winamp, etc) have an equalizer which allows to boost the levels of all bands beyond what the Windows main fader will give, usually by an extra 6dB. Try that first and see if it gives you enough level without audible distortion. Your PC may also have some kind of "sound effects" or "media effects" control program installed which essentially all do the same thing.

Posted by Ian Bailey (Member # 1752) on 11-17-2005, 06:44 PM:

Thanks Michael
That is definitely worth trying before I look into an in-line amplifier.
Ian