AE 282: Spring 2005
WEEK-7 Review: Tube Distortion, M-S
Techniques, Loudness Issue, Tube
/ Ref Link-1, Tube-Link-2
Re-amp, sum and difference
The class focused on guitar amps and distortion.
There are two types of power amp designs, single-tube Class-A (Fender Champ)
and Class AB (even number of power tubes, typically 2 or 4). The
demonstration made obvious that over driving a class AB power amp is better
for lead than rhythm guitar. Class-A delivers a sweeter sound comes
from either overdriving the front end - what a MASTER VOLUME CONTROL does
- or the power amp.
Amps equipped with an OUTPUT IMPEDANCE
SWITCH can be fine-tuned to optimize distortion. CLICK
HERE to see images of how the SOUL-O amp responded...
The Groove Tubes SOUL-O Single is essentially
a Fender CHAMP on steroids,. Featuring a single output tube (6L6
for the demo), the amp is designed to accomodate just about any tube that
will fit in the socket, including the following:
EL84 (with adapter)
WEEK-8's assignment is to configure
PT to allow sum and difference analysis and processing of a stereo mix.
You are encouraged to do this in advance and bring your session files to
class. CLICK HERE for a quiz
that will jog your memory of other topics discussed in week-7's class.
Keep in mind that when extracting and reconstituting
the M-S audio files in the digital domain, it is important to keep track
of LATENCY, the delay caused by any process. For example, if you apply
EQ to the sum, you must also apply EQ to the difference, even if bypassed.
You will notice that delays in either signal path will change the
stereo image, sometimes in interesting ways.