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Subject: MOTM-450 Fixed Filter Bank!

From: Tentochi <tentochi2003@...>
Date: 2004-06-14

Haven't ordered your MOTM-450 yet, but really would like to have one in your
system? Now is the time to order. Especially before the price increase on
July 1st.

For those of you who are newer or forgot what the '450 was all about, here is
the blurb from the website. Very cool stuff indeed!!
------------------------------------------------------------------
MOTM-450 Fixed Filter Bank
$379 kit $499 assembled. Difficulty 5/5

The MOTM-450 Fixed Filter Bank is an improved version of the classic Moog 907A
Filter Bank. The MOTM-450 contains 8 bandpass filters, a lowpass filter and a
high-pass filter. Instead of bulky inductors and hand-matched capacitors used
in the '907A, the MOTM-450 uses a special class of active filters called a FDNR
(pronounced FUD-NER), which stands for Frequency Dependent Negative Reactance.
The FDNR simulates the phase response as well as the frequency response of the
LRC Moog circuit. Other fixed filter banks use more 'standard' filter
topologies, which do NOT sound the same as the FDNR/Moog 907A circuitry. The
disadvantage is that the FDNR requires 3X more parts, which explains the
relative higher cost of the MOTM-450 module. However, the sonic quality
difference is obvious, as is the 12dB lower noise floor compared to other fixed
filter banks (that's 4 TIMES lower).

The controls include a WET/DRY mix (like on the MOTM-410) and a manual/remote
IN/OUT bypass. An LED indicates EQ IN use. The module has an expansion
connector that will allow individual, buffered outputs and envelope followers
on a future 2U wide MOTM-451 Companion Module.

It is important to note that this is NOT a 'graphic equalizer'. The MOTM-450
uses bandpass filters (not cut/boost filters) which are normalized for unity
gain. This means that if all frequency knobs are at 0, no sound comes out. If
all knobs are at '10', you have basically a wire. The way to think about it is
as follows: a knob accents that frequency range only. This makes the MOTM-450
ideal for vocal formants and other such processing. Any line-level audio signal
can be fed through the module, not just MOTM audio signals.
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Here is a simple, early demo of the prototype '450 in action on some pads:
http://www.synthtech.com/demo/m450pads.mp3 (2.5 meg)
Lush and gorgeous!

Here is the link: http://www.synthtech.com/new_stuff.html

Here is the link to order: http://www.synthtech.com/orderredirect.html

If you have questions, mail them to the list or contact Paul directly.

I don't work for Synthesis Technology, I just really believe in this module!

Cheers!
Shemp




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