Studio Electronics ATC-1X - Manual (Page 12)

What the Switch pads do:
Selects the mix level of Oscillator 1. As the level is increased beyond 100 100 some
harmonic distortion may occur; which is quite normal depending upon how many
waveforms are selected and the settings of the filter.
Selects the mix level of Oscillator 2 (same potential for harmonic distortion as
Oscillator 1).
Selects the mix level of the noise or distortion. Noise is a random signal, a
rushing, static-like sound. The
ATC-X 's noise generator produces white noise.
White noise is composed of all frequencies in equal amounts. Note: The noise
may not be audible if the filter frequency is set too low. In lieu of Noise, press the
no ise/dist no ise/dist button once to see which function is currently selected; press again
to toggle to the other function. Set the Noise level or Distortion amount using
the rotary encoder.
Selects the different pitch modes of Oscillator 2. The modes are as follows:
0 - normal operation
1 - Oscillator 2 is synced* to Oscillator 1
2 - No control voltage to Oscillator 2 (pitch does not track keyboard).
3 - No control voltage to Oscillator 2 and it is synced to Oscillator 1
*Forces the pitch of Oscillator 2 to follow the pitch of Oscillator 1 in hard
synchronization so it will therefore tune only to harmonic frequencies of
Oscillator 1. Intermediate frequencies of Oscillator 2 will produce unusual wave
shapes and timbres.