Hi Chris

> Is the A-119 the only way you can incorporate external audio into the A100 or can you
> patch another synth, for instance into any of the audio inputs

The signal of most other synthesizers fit well into the audio inputs af
any audio module. The real advantage of the A-119 is given with non line
signals (e.g. guitares or microphones). Also the functions of envelope
following and gate creation from audio signals can be provideed only by
the A-119.

> Can sound from the Audio Outs of the modules (VCOs, VCAs, ect) be patched directly into
> my home monitors or do you have to use a Mixer module for that

You always should use some gear, that is able to decrease the sigkla
volume (e.g. some small mixer like an Behringer or Phonic. The direct
output signal level of the A-100 is to high to connect it direct to an
active monitor.

> Finally, I'm not 100% clear on the difference between the Linear and Exponential Mixers
> and VCAs.

Mixers: Linear for control voltages, Exponential for audio

VCA:
- Linear for envelope control (ADSR - the control signal is already
exponential),
- Exponential for LFO and dynamics control (e.g. velocity from MIDI or
envelope follower).
Where mixing audio signal on a linear mixer is not perfect but possible,
mixing control voltages on a logarithmic mixer is very unsatisfying.

If you want to take only one VCA or one mixer, you should buy the linear
version of each.


Florian