The Setup Menu; General; Auto Id (Au); Delay Compensation (Dc) - RME Audio Micstasy User Manual

11. The Setup Menu

11.1 General

Some options and settings are accessed and changed very seldom. These have been collected
in the Setup menu.
The Setup menu is entered by pushing SAVE and RECALL at the same time. All changes are
stored automatically.

11.2 Auto ID (Au)

Default: Off
Available settings: On, Off
This option relates to the use of the I64 MADI Card. Multiple Micstasy (and ADI-642 and ADI-8
QS, see chapter 14.4) connected serially can assign consecutive IDs to themselves (see chap-
ter 11.4). For this to happen, Auto ID is set to On at the first device of the chain. All other de-
vices automatically turn into slaves. An Auto ID slave has the middle dot lit in the GAIN display
of channel 8.

11.3 Delay Compensation (dC)

Default: 0ff
Available settings: On, Off
This option relates to the use of the I64 MADI Card. When multiple devices are connected seri-
ally, the MADI I/O of each Micstasy causes a delay of 3 samples. Therefore at the MADI output
of the last device, the data of all upstreamed devices are delayed. At Double Speed the delay
rises to 6 samples per unit, at Quad Speed to 12 samples.
The problem of this offset is solved by the function Delay Compensation. It delays the signals in
a way that they are sample-synchronous in multi-device operation. Attention: Delay Compensa-
tion has to be manually activated in each unit!
The following table lists the delay in samples from two up to eight units connected serially.
When using four units, the data of the first unit are delayed by 9 samples to the last unit, the
units 2 and 3 are delayed by 6 and 3 samples respectively. At Double Speed and Quad Speed
the values rise. Please note that in Double Speed no more than four, in Quad Speed no more
than two Micstasy can be used serially with MADI.
Units Delay
2 3
3 6
4 9
5 12
6 15
7 18
8 21
As shown in the table, activating DC causes a constant delay of 21 samples in Single Speed,
no matter how many devices are connected serially. In Double Speed the delay is 18, in Quad
Speed 12 samples. The in most cases slightly increased delay is outweighed by the big advan-
tage of sample-aligned I/Os when using multiple units.
20
Delay DS Delay QS
6 12
12 -
18 -
- -
- -
- -
- -
User's Guide Micstasy © RME
DC DC DS DC QS
21 18 12
21 18 -
21 18 -
21 - -
21 - -
21 - -
21 - -
21 samples @ 48 kHz
equal 437 µs.
18 samples @ 96 kHz
equal 187 µs.
12 samples @ 192
kHz equal 62.5 µs.