13 Oct
2004
13 Oct
'04
1:37 a.m.
On Tue, 12 Oct 2004 19:16:37 -0700, Erik Steffl <steffl(a)bigfoot.com> wrote:
Mark Knecht wrote:
...
Well, I'd guess the best answer, if this is what's really going on, is
to use an impedance matching transformer of some type. Get a high
input impedance, lower output impedance model. Don't know what this
would cost. Probably not cheap, but not really expensive either. This
is very typical for stage work. they get used to turn single ended
into balanced/differential signals, etc., so that you can run long
distances.
Another possibility would be to find a secondary amp to put in the
middle. A good quality headphone amp or something like that *might*
work.
These are all guesses. Take it with a grain of salt.
- MArk
>>> I am trying to record from a
receiver (not sure if that's the right
>>>name, it's the amp/tuner, the thingy that all other components like CD
>>>player, tape deck, video etc. connect to) and it seems like the levels
>>>are too low (the soundcard is soundblaster live platinum, using alsa
>>>drivers that come with kernel 2.6.5).
...
1V amp PP output -> 1000 Ohm output
<---cable----> 1000 Ohm input
In the above pirture to voltage the input receiver sees is 50% of the
voltage actually driven.
...
This stuff comes up a lot when interfacing studio
equipment. This, and
the levels provided as per the post from Andreas, are generall the
root cause of this sort of problem.
that might be the case, I see the signal being at about 20-40%,
compared to about 50-70% 'normal' signal (in vu-meter).
the big Q remains - what do I do? (I didn't try the headphones output
yet, but everybody says that headphones output on the consumer receivers
is of poor quality (then again, I listened to it via headphones and it
was good enough for me...)).
erik