Version OS 1.0
7.3 X Sample Instruments
Basically the two X Sample instruments have the same sampling engine as the hybrid
analog sample channels, except the analog functions like envelopes, filters and metal
noise are missing and the instruments are only played back on the stereo mix output.
They have no individual output.
Sampling of external audio signals is only possible on these two instruments.
For the sake of simplicity, the following paragraphs describe only the parameters that
differ from the hybrid analog sample channels. The rest is described in section 7.1-7.2
7.3.1 X1/X2 Page 1 A
7.3.1.1 Sample select X < RAM1, RAM2, 2-300 >
Selects the sample from the sample flash memory. The difference to the hybrid analog
sample channels is that the 2 low positions (RAM1, RAM2) play back from the RAM
sample buffer. It may contain a previously loaded sample either from disk or by the
internal sampling function.
RAM1 means that the whole sampling RAM of 256k (= 262144) samples is played back.
This is 4 times the regular flash memory slots of 64k samples and has an endurance of
5.46 sec at nominal pitch ( Pitch = <055> ). At 120 BPM this is more than 2 measures,
so it's even usable for drumloops.
Please note that if both X instruments have RAM1 selected, the other X sample
instrument plays back exactly the same buffer.
If RAM2 is selected, the first instrument X SAMPLE 1 addresses the lower half of the
RAM sample buffer, X SAMPLE 2 the upper half.
This also implies that, for instance, X1 may be set to RAM1 and plays the RAM buffer at
full length, while X2 is set to RAM2 and starts at the second half of the RAM buffer.
ALPHA BASE Operating Manual 55
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