Electro-Harmonix MAINFRAME bit crusher Manual page 4

S R
AMPLE
In Sample Rate Tuning Mode, the Mainframe analyzes your input signal in
real-time, and sets the sample rate to match the pitch of your signal, or a
set interval above your signal. You can use this mode to lock the sample
rate to a certain pitch for a song, or you can keep it constantly tuning
along with every note you play.
HOW TO TUNE THE SAMPLE RATE
1. Double-tap the footswitch to enter Sample Rate Tuning Mode. The
Red LED will begin blinking in a slow pattern to indicate that the
Mainframe is actively tuning the signal.
Note: You can leave the Mainframe in tuning mode indefinitely and it
will continually tune to your signal.
2. While in Sample Rate Tuning Mode, turn the SAMPLE RATE knob to
select the interval above the guitar pitch at which the sample rate will
be set. See the diagram below for the available interval ranges. The
default interval is two octaves.
3. While in Sample Rate Tuning Mode, tap the footswitch again to lock
the sample rate to whatever note you're currently playing. You must
be playing a note while pressing this footswitch for the Mainframe to
save the note/interval combination.
INTERVAL RANGES IN SAMPLE RATE TUNING MODE
Tip: When the interval is set to Unison or Octave, you may hear little to
no sound while in Sample Rate Tuning mode, because the Mainframe is
sampling the signal in the same place every cycle.
T
ATE UNING
M
ODE
While in Sample Rate Tuning Mode,
the Mainframe reads the input
signal, then multiplies it by the
interval selected with the SAMPLE
RATE knob (see diagram) to produce
the tuned sample rate of your
choice.
Example: If the interval is set to 2
octaves and the guitar plays an A2
(110Hz), the sample rate will be set
to A4 (440Hz).
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