SONOSAX SX-R4 (Firmware v3.1) User Manual
Page 32
User manual
SONOSAX SX-R4
Page 32 of 53
SETUP > RECORD SETTINGS > SAMPLING SETTINGS > SAMPLING FREQUENCY
This menu lets choose the sampling frequency. Choices are: 44.1, 48, 88.2, 96, 176.4 and 192 kHz.
If an AES input is assigned, then the SX-R4 will automatically lock on the incoming AES sample frequency
and thus the selected sampling frequency will be overwritten. The sample frequency value of the incoming
AES signal can be controlled in the UNIT STATUS menu.
SETUP > RECORD SETTINGS > SAMPLING SETTINGS > SAMPLING UP / DOWN
The Pull-Up / Pull-Down correction for the NTSC world can be set in this MENU. The possible values are
NOMINAL (use of the nominal sampling value), UP ‰ (positive correction of one per thousand, or 0,1%) and
DOWN ‰ (negative correction of one per thousand, or 0,1%).
SETUP > RECORD SETTINGS > SAMPLING SETTINGS > SAMPLING RATE
This menu lets you set the sample's quantification (number of bits per sample) stored in WAVE files. Although
the A/D converters of the SX-R4 still work in 24 bits mode, the DSP can re-quantify the recorded samples by
the following values:
•
24 bits: original value as quantified by the A/D converter
•
16bits Dithering: reduction to 16bits per sample with dithering of trianguaire type
•
16 bits: reduction by truncation of the original quantization
The DSP also uses these values to the incoming AES signal.
SETUP > RECORD SETTINGS > PRE-RECORD TIME
The Pre-Record time can be set from 1 second up to 20 seconds. The selected value may not always be
possible due to the physical limitation of the built-in memory and the selected configuration.
The Pre-Record time depends on following factors:
•
Number of Tracks being assigned
•
Sampling frequency
•
Sample Rate and Pull UP/ Pull DOWN correction
When the required pre-record time is not possible, the SX-R4 will perform on "best effort" basis to provide
with the maximum possible. The table below shows the maximum values of the pre-record time [seconds]:
16 bits
Tracks count
fs
1
2
3
4
5
6
7
8
9
10
44100 20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 18.5 16.6
48000 20.0 20.0 20.0 20.0 20.0 20.0 20.0 19.1 17.0 15.3
88200 20.0 20.0 20.0 20.0 16.6 13.9 11.9 10.4
9.2
8.3
96000 20.0 20.0 20.0 19.1 15.3 12.7 10.9
9.6
8.5
7.6
176400 20.0 20.0 13.9 10.4
8.3
6.9
5.9
5.2
4.6
4.2
192000 20.0 19.1 12.7
9.6
7.6
6.4
5.5
4.8
4.2
3.8
24 bits
Tracks count
fs
1
2
3
4
5
6
7
8
9
10
44100 20.0 20.0 20.0 20.0 20.0 18.5 15.9 13.9 12.3 11.1
48000 20.0 20.0 20.0 20.0 20.0 17.0 14.6 12.7 11.3 10.2
88200 20.0 20.0 18.5 13.9 11.1
9.2
7.9
6.9
6.2
5.5
96000 20.0 20.0 17.0 12.7 10.2
8.5
7.3
6.4
5.7
5.1
176400 20.0 13.9
9.2
6.9
5.5
4.6
4.0
3.5
3.1
2.8
192000 20.0 12.7
8.5
6.4
5.1
4.2
3.6
3.2
2.8
2.5
In these tables, the Pull Up/Pull Down correction is not taken into account (negligible).