new Formant book arrived

[jh.]

Got the new Formant book today.

First impression brings up a couple of questions:

TL081's as noninverting buffers after 3080's in VCF.
Should lock up due to phase reversal when heavily overdriven,
shouldn't it ?

Heated transistor array for the VCOs. Adjustment by measuring
the voltage drop over a be junction and emitter resistor. They say
the voltage depends on the manufacturer of the chip - I'd
expect it to be different for each chip, not just for each manufactuer.

Moog ladder with with single opamp buffer stage ... debatable.
But what's really bad about the Moog VCF article is the theory:
They show an unbuffered symmetrical RC filter and say the
transistors take the place of the resistors - way over-simplified.

A lot of low current BiFet opamps (TL061) are used, mainly for the
output stages. Why use the low current version here, but TL081's
in the VCF's internal stages ?

The nice old OTA-based 4pole VCF is gone. The tiny jacks remain.

Still a lot of words about the quality a VCA should have - and still
3080's used.

Nice little sequencers added.

(Just a first impression.)

JH.