Calrec SUMMA, User Manual

Page: 104 / 198

Tone Idents
Tone idents are variations in the tone signal used to identify legs of multichannel paths when verifying routing and
patching. To set an ident for a stereo or 5.1 path, tap the
IDENT selector button in the oscillator window for the chosen
path width to display a pop-up menu populated with path width specific ident options, as shown in the following table:
Ident Description Width
Ident Description Width
L Only
Similar to the EBU ident specification. The tone routed to the left
hand audio channel is repeatedly interrupted while the right channel
remains constant (stereo paths only).
Stereo
L=1, R=2
Similar to the GLITS ident specification. Tone is repeatedly inter
rupted on both left and right channels. Each interruption on the left
channel is followed by two interruptions on the right channel.
Stereo
BLITS “NORM”
First, a short burst of tone is applied to each of the six channels, one
at a time, in order. Four different frequencies of tone are used at this
stage to help ID the channels—L/R outputs at 880 Hz, center at
1320 Hz, LFE at 82.5 Hz, Ls/Rs at 660 Hz. This is followed by 1kHz
tone on the L and R legs only. The right channel is continuous, whilst
the left channel is repeatedly interrupted. The last stage of the cycle
applies 2 kHz tone on all six channels simultaneously before begin-
ning the cycle again. Each cycle lasts approximately13 seconds.
The different frequencies
used help to identify each part of the
cycle, for example, if 1 kHz can be heard anywhere other than front
L/R, there must be a problem with routing or patching.
5.1
104 SUMMA
Networked Audio Production System
GETTING SIGNALS IN AND OUT