29 May
2008
29 May
'08
2:27 p.m.
On Thu, May 29, 2008 at 3:39 AM, Andre Majorel <aym-psd(a)teaser.fr> wrote:
On 2008-05-27 22:00 +0100, Simon Williams wrote:
Try it and see but I bet they both will sound muffled. If you have
a bipolar supply hanging around, you can make an unbalanced buffer
for cheap.
Tip of jack from guitar to ground via a 1 M to 5 M resistor and to
the non-inverting input of a TL071. Output of TL071 to its
inverting input and to a 220 ohm resistor. Other end of resistor
to tip of jack to line input. Leave the offset adjust pins
unconnected. Sleeve of both jacks to ground.
^ +15 V
|
-----------
| _ | |
| 2| -_7 |
--|- -_6 | 220
| _---+--^v^v------\ /| TO
FROM |\ /-------+---|+ _- TL071 \/ | LINE
GUITAR | \/ | 3|_-|4 _______| INPUT
OR BASS |_______ < | |
| > 1~5M | ---
--- < v -15 V
|
---
You could surely do something similar with a unipolar supply (9 V
battery or wall wart) but I don't know how. There is probably a
bipolar supply inside your mixer, though. If it doesn't exceed
+/-18 V, you could use that. Shouldn't be a problem, a TL071 draws
very little current.
Wouldn't any non-"True Bypass" stomp box do the same thing?
Fons Adriaensen wrote:
Use an
active DI-box, in particular if the guitar output has
to be split for a guitar amp as well.
What if I can't afford DI-boxes? Which is best to use?