21 March 2010, 23:19 | #1 |
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Location: Norway
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Doing mods to the Amiga sound output
Hey ho (let's go)...
One day I was changing the capacitors on an A1200 motherboard I had lying, then I accidentally broke a resistor near the very end of the sound output circuit. I tried to boot the Amiga for shits and giggles-- the left sound channel was all dead.. Then I did something sick just to save her: I desoldered the right resistor too, then I shorted both of them (individually of course). Now the sound worked, but to my surprise it was way louder than normal. Now it was more like it should be. As pre-amplified as it can be without distortion or clipping. I like this because I run the sound through line-in on my sound card. The louder the better, so I can enjoy sounds from my Amiga without turning the volume up a bit more than usual. Thus I wondered, can't we just replace those resistors with some of a lower value, so the sound will be a bit louder? Or even short them if this is acceptable after all? The names of these two resistors are R324 and R334 (A1200). They are to find around the two output RCAs. Let me know if this is dangerous to the circuit or something like that... And here's another pondering: The sound output is hard-panned... 100% to the left, 100% to the right... This is like a semi-stereo (fake stereo), but it annoys me to death. Can one with some electronic components make the "panning" less hard-panned? Not much, but just a tad bit. I know this is not likely to be easy or simple at all, but who knows.. I'm not the electricity genius. I use headphones all the time and I have no money for a mixer board to pan the sound. And AHI eats up too much CPU... Thanks for reading my wall of text. Last edited by 8bitbubsy; 21 March 2010 at 23:27. |
22 March 2010, 06:21 | #2 |
I hate potatos and shirts
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Dangerous for the circuit, yes.
Put back the resistors or even ones with a small lower values to keep the operational amplifier back to safe conditions. |
22 March 2010, 07:41 | #3 | |
Precious & fragile things
Join Date: Feb 2009
Location: Victoria, Australia
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