DCS Delius - Sample Rates; Frequency Response (Set to Filter 1); Table 5 - IEEE 1394 Interface Electrical Characteristics; Figure 10 - Frequency Responses at All Sample Rates, Set to Filter 1

dCS Delius User Manual Manual for Software Issue 2.3x
dCS Ltd September 2004
Manual filename: Delius Manual v2.3x.doc Page 47 email: more@dcsltd.co.uk
English version web-site: www.dcsltd.co.uk
IEEE 1394
I/O
Type
High speed, multi-channel
Data format
dCS encrypted DSD
Connectors 6-way (2)
Table 5 – IEEE 1394 Interface Electrical Characteristics
Sample Rates
• 32, 44.1, 48, 88.2 or 96kS/s on single wire interfaces and SDIF-2 /
Wordclock Input, auto selected. Optical inputs are not guaranteed at
88.2kS/s and 96kS/s.
• 88.2, 96, 176.4 or 192kS/s on Dual AES interface, auto selected.
• 2.822MS/s for DSD, requires a 44.1kHz wordclock.
• 44.1kHz for Wordclock Output in master mode, not temperature
compensated.
Frequency Response (set to Filter 1)
• Fs=32kS/s +/-0.1dB, 10Hz to 15kHz
• Fs=44.1 or 48kS/s +/-0.1dB, 10Hz to 20kHz
• Fs=88.2 or 96kS/s +/-0.1dB, 10Hz to 35kHz
• Fs=176.4 or 192kS/s +0.25/-0.35dB, 10Hz to 55kHz
5
• DSD +0.2/-0.35dB, 10Hz to 55kHz
Filter 1 Frequency Responses
-24
-18
-12
-6
0
6
0.02 10 20 30 40 50 60 70 80 90 100
Tone Frequency (kHz)
Level (dB)
192k176.4k
96k
88.2k
48k
44.1k
32k
DSD
Figure 10 – Frequency responses at all sample rates, set to Filter 1
5
The point of high sample rates is not to have a ruler flat response with a brick-wall filter. The roll-off is
deliberate. See for example “Effects in High Sample Rate Audio Material” by M.J.Story, R.Kelly, D.A.Macleod
& M.N.Harris, presented at the 20
th
Tonmeister Tagung at Karlsruhe in 1998.