Tb-303 Settings; Analog Voice; Oscillators; Filter - Abstrakt Instruments Avalon Reference Manual

13 TB-303 SETTINGS

13.1 ANALOG VOICE

The analog voice is backwards compatible with the TB-303. The
additional features can be viewed as a layer on top of the original TB-
303 subset of controls. To limit the Avalon sound capabilities to that
of the TB-303 use the settings as shown above and described below:

13.1.1 OSCILLATORS

The sub oscillator should not be used. Set the SUB/INPUT control to
the minimum setting.
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13.1.2 FILTER

If the exact CUTOFF range of the TB-303 is desired see Appendix A for
adjustment options. The Avalon ships with default settings that give
an extended range.
TRACKING should be set the minimum (off) setting as it is not found
on the TB-303. IA

13.1.3 FILTER ENVELOPE

If the exact range of ENV MOD (filter envelope modulation) is desired
see Appendix A for adjustment options. The Avalon ships with default
settings that allow envelope modulation to be turned off completely
when the control is a the minimum setting.
Set the ACC DECAY control to minimum as this corresponds to the
fixed setting of the TB-303.

13.1.4 VCA ENVELOPE

The TB-303 has a fixed VCA Decay time of 3s. This is equivalent to the
3 o'clock position of the VCA DECAY control.

13.1.5 MODULATION ENVELOPE

The modulation envelope should not be used. Set the VCF DEPTH
and VCA DEPTH controls to the center-off position.
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13.2 SEQUENCER

To limit the sequencer to TB-303 behavior you'll have to ignore
several pattern write modes and the additional pattern step
attributes.

13.2.1 PATTERN WRITE MODES

To program the sequencer like the TB -303 use PITCH & TIME STEP
ENTRY MODES as described in section 5.3. You will still need to set
the pattern length as described in section 5.2.3.1.
The TB-303 does not include the following pattern write modes:

Normal Mode

Realtime Mode

Record Mode

13.2.2 PATTERN MODIFIERS

Do not use the following pattern modifiers (the default settings
correspond to the TB-303):

Pattern Length (use 16 steps max)

Pattern Direction

Shuffle

Pattern Rotate

Pattern Randomize

Filter B Mode

13.2.3 PATTERN STEP ATTRIBUTES

Do not use the following step attributes (the default settings
correspond to the TB-303):

Modulation Envelope Triggers

Slide Time

Filter CV Offset

Gate Length

Active Steps

14 BLOCK DIAGRAM

AVALON - Reference Manual