I'm a little confused about the difference between the triple preamp and the
input module besides XLR jacks. Is the preamp for high-impedance inputs
like guitars? Personally, my ideal IO module has three channels I can
switch between line>>motm and motm>>line in 1U, and just 1/4" jacks, but I
haven't left room for peak LEDs. Though it's quite possible I'd want more
channels than that, and then an input module plus an output module is
alright.
I sort of like keeping the mic, phono, and headphone in a seperate module...
many of us are going to have mixers that perform these functions already -
though I'm sure with more noise and THD than Paul would provide. ;-) By
phono you mean with RIAA equalization and everything?
I'm not a fan of bicolor LEDs: I'm partly color-blind and I can't tell red
from green at a glance, I really have to look at it for a second to see
which it is. And my color-blindness isn't all that bad, some guys are a lot
worse than me (this affects 10% of men, and yes, I check every resistor with
a meter!) Design for accessibility, and all that... a two or three-segment
indicator, on the other hand, is a perfectly fine thing. (Though if push
comes to shove, I can always replace a bicolor with a single color LED and
just get the peaks.)
Any thought of supporting (even through jumpers or component value
change) -10dBv consumer levels? I know its lame to play samples back with a
computer sound card, but I spent my allowance on modules...
...Craig
----- Original Message -----
From: "J. Larry Hendry" <jlarryh@...>
To: "MOTM List" <motm@yahoogroups.com>
Sent: Thursday, August 21, 2003 9:34 PM
Subject: Re: [motm] Asking for input: I/O Module
> > ----- Original Message -----
> > From: Paul Schreiber <synth1@...>
> > a) These I/O modules ∗do not∗ replace the Triple Pre-Amp (1U) modules.
> Which, BTW, I ordered prototype parts for today :)
>
> > b) I am leaning towards 3 modules:
> Crazy talk??!?
>
> YES. That is nuts in my book -- a preamp and 3 other modules for I/0.
> Sorry, I cannot see 4 or more U of space in my system for just I/O. How
> about just 2 modules. One is a input / preamp module one is the output
> module.
>
> > a new I/O module. This is what I'm thinking about:
> > a) has 2ea MOTM level-to-balanced out (+4dbu into 2 XLRs and TRS jack)
>
> I like that on the output module. I do like the idea of the combo XLR /
TRS
> jacks for saving panels space. Then, if you wanted you could also provide
an
> unbalanced output with the 1/4 only jack.
>
> > b) High-end headphone amp with several sneaky tricks (not telling!).
>
> I can see that on the output module. The other thing that would be cool
on
> the output module in my opinion is an effects loop (send and receive
jacks)
> that assume the effects will be an unbalanced line level.
>
> > c) 2ea balanced in (XLR + 1 TRS) to MOTM level (+4dBu >>10V pk-pk)
>
> Why? I can see one channel of the preamp with a balanced and unbalanced
> input (switchable line/mic level). Maybe the second channel is the
same.
> Channel # 3 is for guitar / instrument / phono level inputs. Would that
not
> all be in the range of one control to adjust What other input do you need
> to make the input module separate from the preamp module?
>
> > Any thoughts (no 100 segment VFD bar graphs...sorry!)
>
> Ok. But, I do like the idea of a single bi-color LED green for signal /
red
> for peak.
>
> Larry
>
>
>
>
>
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