I need the line-out voltage to remain at a fixed level even if input volume is changed. I'm using this for a home PC-based Jukebox. I want to be able to change the volume to a set of speakers at the jukebox using the jukebox software, however the line-out is to be connected to a FM transmitter, so it needs to remain at a fixed level even if changes are made to the speaker volume.
The FM transmitter just broadcasts what ever I'm playing on the Jukebox so I can also listen with other stereo equipment, such as my WP7 phone while I'm cutting the grass, etc. I was hoping to find a PC sound-card with a simple analog stereo line-out, but most just have speaker outs now days. I don't need surround, just stereo speaker out, with a stereo line-out.
The older cards may not have drivers for Win7 and even less likely for Win8, which is what I'm using for the jukebox PC. Soundcards have line-outs, to be hooked to active speakers with internal amplifier , or higer-impedance headphones.
IIUC what you want is two pair of stereo outputs - one with volume control and another at fixed volume. Any multichannel soundcard would do, with software routing to the second pair of outputs and independent volume control per channel. It would be a simple task in linux, I have no knowledge of windows.
Perhaps others will help you with the routing. Seems to me, with the jukebox software as the playback device, and changing the jukebox volume, it will change the volume for everything downstream. Hi Sofaspud, Yes that is the problem with most current sound cards. They are calling speaker-outs line-outs, when a true line-out is a fixed pre-amp like line voltage maybe.
I power the jukebox speakers with an old Kenwood M1. Sounds pretty good going to a set of Optimus Mach 3s. I went with the Mach 3s becasue they have horn mids and tweets, and I covered the 15" woofs with grids.
Makes a pretty durable set-up for portability as well, and a lot cheaper than Peaveys or such. Being a jukebox, I just designed it to thump moreso than for fine audio quality. I'm only getting FM quality sound on this side anyway. It has Win7 drivers at least, and hoping it may work on Win8.
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Viewed 27k times. Kellenjb Add a comment. Active Oldest Votes. Olin Lathrop Olin Lathrop k 36 36 gold badges silver badges bronze badges. Also, are there no capacitors needed since the other circuits seen on answers to this and similar questions have them?
Rocketmagnet Rocketmagnet It's a lot better to make a significantly lower impedance yourself so that the amp input impedance can vary over a wide range without changing what the attenuator does. Sometimes that's hard to do, but with around voltage attenuation needed, low output impedance comes for free. Do you wire audio-out L and R together and forget the bottom half of the diagram? Do you need other resistance values in this case? Ed Davis Ed Davis 49 1 1 bronze badge.
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If you see it again it's because something has changed so please set your preferences accordingly. Connecting a line level device into a Mic input without a pad? Thanks in advance.. My Studio. I would think a pad would be the most pure way Sorry I should've been more explicit It has a mic input with no pad I'm trying to use it as a hardware insert in protools and send audio out of my PT interface into the pre and use its e.
Since the PT outputs are line outs, the outputs are way too hot to go into the mic inputs on this device with the gain all the way down Originally Posted by kwilliams. Originally Posted by NathanEldred. Buy an inline pad like the Shure model, it's cheap and invaluable in any studio. You can put it between any two devices where it's needed, such as your converter's line level output, and the input of the microphone preamp.
My most common use for them is between a microphone output and the input of the mic preamp. An inline pad!! Why not print it to another track and just turn the fader down til you get the input gain you want? Wouldn't that work? Just a suggestion- I am acutally planning on trying the same thing, but sending a line level signal through a guitar pedal. I'll let you know how it works out. Later, Mike. Units like the Shure inline pads may not be the proper answer since they are designed to work in an " Ohms impedance world", while your line outputs are designed to work into a much higher impedance load.
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