How To Use The Tune Display - Alesis ANDROMEDA A6 Reference Manual

Appendix C: Troubleshooting
AUTO TUNE Parameters
PAGE PARAMETER
TUNE
MASTER
BKTUNE
TMPTUN
AUTO
VOICE
BAND
VCACAL
Press twice to initiate a calibration of each VCA's base levels.
OSCFRQ
Press twice to tune the oscillators only.
OSC-PW
Press twice to tune the pulse width of the oscillators only.
FILFRQ
Press twice to tune the filter frequencies only.
H U
OW TO SE THE
Pressing the
summary of the A6's tune status. The top row shows the voice number. The middle
row shows the tune status of each voice's VCAs. The bottom row shows the tune
status of the filters and oscillators. A "
properly. A blank space means the voice was not tuned since the last powerup.
In the other Auto Tune pages except
details. Usually, this will be of no concern, but in case there's some problem, you can
track it down using this display. There are a lot of things to tune in an analog
synthesizer. Each of the Andromeda's 16 voices has two oscillators which need to be
tuned over 17 different frequency bands. In addition, the pulsewidth, filter
frequencies, and the VCAs need to be calibrated.
With so many different variables, there's not room to monitor them on a single
screen. So, you need to scroll through the displays using the
controls to see them all. Here's an example of what a screen may look like:
1: TUNEOK
2: TUNEOK
3: TUNEOK
4: TUNEOK
5: TUNEOK
6: TUNEOK
OSC1
266
OPTIONS
or RANGE
354.35 Hz ···
546.42 Hz
ON/OFF
ON/OFF
1-16
1-16
TUNE D
ISPLAY
button will take you to the
AUTO TUNE
TUNEOK TUNEOK -OSC1-
TUNEOK TUNEOK NOTUNE
TUNEOK
TUNEOK
TUNEOK
TUNEOK
OSC2 VCA OSC-PW
DESCRIPTION
Sets the basic tuning reference of the
Andromeda for A4 (the A above middle C).
The default is 440.00 Hz, which is the modern
concert reference. You can set it to A=440 by
pressing the keys simultaneously.
INC/DEC
When , the Andromeda will constantly tune
ON
unused oscillators in the background.
When ON , the Andromeda will constantly
monitor its temperature and adjust the
oscillators to compensate for changes.
Selects which of the A6's sixteen voices is
currently shown in the TUNE display.
Selects which oscillator tuning band is shown in
the top line of the display.
page. This displays a
AUTO
T " under the voice means it was tuned
TUNE page, the display gives more tuning
TUNEOK TUNEOK
TUNEOK TUNEOK
TUNEOK TUNEOK
TUNEOK TUNEOK
TUNEOK TOOHI
FILT1 FILT2
A A6 R
NDROMEDA
VOICE and BAND
12
VOICE BAND
M
EFERENCE ANUAL
1