Doepfer A-112 Sampler/Wavetable Oscillator - Manual (Page 14)

A-112 Sampler System A - 100 doepfer
14
H All functions and controls (sampling fre-
quency, length of delay memory ...) are the
same as in the normal delay mode (see
above).
• Pitch shift mode
In pitch shift mode the audio input signal is sampled
and played back at the audio output with shifted pitch/
tuning.
H Memory bank S2 is overwritten in this mode!
Principle: The incoming audio signal is sampled with a
fixed sampling frequency (about 16 kHz) and written
into memory bank S2. Each sample increases the
memory position by 1. Simultaneously the memory is
read out with a sampling frequency that is determined
by the Tune control 2 and the voltage applied to the
CV input ".
If the read frequency is nearly the same as the write
frequency (i.e. about 16 kHz) no pitch shift occurs -
just a delay depending upon the memory length (Len).
If read and write frequency differ the audio signal is
read out faster or slower and the pitch shift effect
occurs.
Because of this very simple “bog standard“ algorithm
overlapping effects may occur and lead to interfe-
rence, glitches or clicks in the audio output signal.
H All functions and controls (read sampling
frequency, length of delay memory ...) are
the same as in the delay mode (see above).
P Very interesting sounds can be obtained if
the original audio signal is mixed with the
pitch shifted signal of the A-112 (using a
mixer A-138a/b).
5 5 5 5 6 6 6 6 7 7 7 7 Audio / Wave-CV In Tune / CV
Eff Pit Norm audio signal sampling fre-
quency