Aion Electronics Isotope Посібник - Сторінка 2

Переглянути онлайн або завантажити pdf Посібник для Музична педаль Aion Electronics Isotope. Aion Electronics Isotope 9 сторінок.

1 Project Overview

2 Introduction & Usage

INTRODUCTION

The Isotope Amp Overdrive is an adaptation of the "Tube Voice" channel of the Intersound Instrument

Voicing Preamplifier, a rack preamp from the late 1970s that was favored by Steve Albini and the

Grateful Dead among others.

The IVP's Tube Sound channel was unique in its method of overdriving the signal. There are no diodes

to be found, but rather, the signal is clipped by overloading a miniature transformer. Add in a two-band

tone control and you've got a really flexible circuit that doesn't look or sound quite like anything else.

The Isotope Amp Overdrive is a greatly reduced version of the IVP, extracting just the Tube Voice

channel which makes up approximately 25% of the whole preamp circuit, which also includes a clean

channel and 4-band parametric equalizer. It's been adapted to run off of +/-9V instead of +/-15V like the

original. However, all the character of the drive channel is retained and it makes a great standalone drive

pedal if you want something a little different!

One thing to mention: the Treble knob can create oscillations at the very high end of rotation. We tried

several things to mitigate this during development, including better power filtering and tweaking the

values of the treble control, even a new PCB layout, but nothing really fixed it. However, since it only

impacts the last 5-10% of the rotation which is really outside the useful range of the control, we opted

to release it as-is.

USAGE

The Isotope has the following controls:

• Drive controls the amount of gain in the op-amp stage that is fed into the transformer. Overloading

the transformer pushes it into clipping.

• Treble is a half of a Baxandall tone stack affecting the high frequencies.

• Bass is the other half of a Baxandall tone stack affecting the low frequencies.

• Master controls the overall output of the effect.

ISOTOPE AMP OVERDRIVE

9 Licensing

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