pauln Posted December 28, 2006 Share Posted December 28, 2006 I'm imagining a little box with two knobs and a long cord that goes to the preamp. The top knob is a level selector, the second controls the frequency of a sine wave from 20-20KHz. The output level stays constant for all frequencies. The long cable allows one to be anywhere in the room to hear the sound. It seems like it would be a great advantage to be able to manually wave the signal up and down to hear problems, especially in the crossover ranges. It would also clear up folks' guessing the low and high boundaries of their systems (for their own ears). I know things like this exist as computer programs that generate octave sweeps and make plots, but wouldn't the little box be more direct and more fun? Maybe it could have a pair of LED displays indicating the level and the frequency. Seems like even if you had the PC plot you would still want to use the little box to hone in on the actual problem areas? How difficult would the circuit be to construct? If these already exist, are they expensive?If someone made these I think they would be very popular. Quote Link to comment Share on other sites More sharing options...
DrWho Posted December 28, 2006 Share Posted December 28, 2006 How pretty and accurate would you want it to be? I take it you want the box to plug into a normal RCA input on a preamp? I would think something like this would be easy and rather inexpensive to make. http://www.sound.westhost.com/project86.htmhttp://www.sound.westhost.com/project22.htm http://www.sound.westhost.com/project22.htm''>http://www.sound.westhost.com/project22.htm' mce_href="http://www.sound.westhost.com/project22.htm">Somewhere along my ways I came across a bunch of analog tone generators, but I can't seem to find any of them online. I recall them being very expensive though. Maybe try ebay? Quote Link to comment Share on other sites More sharing options...
maxg Posted December 28, 2006 Share Posted December 28, 2006 Long cords would be a pita - a remote might be better. Not sure you need a level selector either - doesnt your amp/pre-amp have a volume control? Otherwise - sounds like a great toy to play with - although I have a CD from Behringer (I think) that does much the same thing and I can do the track selections with the remote for the CD. Bot quite as flexible as what you are looking for - but a lot cheaper I would guess (actually it was free). Quote Link to comment Share on other sites More sharing options...
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