mikehende wrote:Alright, let me see if I can understand what you've just written plus what CS70 has written.
No worries, this jargon is confusing at start.
A TRS (Tip, Ring and Sleeve) cable is a regular cable, but it can carry two independent signals.
It's called a "stereo" cable, because a stereo signal is made, by definition, by a mono signal for the left sound and another mono signal for the right sound, transported together; for example the "mains out" from the mixer - that goes to the speaker - is a stereo signal So a TRS cable is a compact way capable of transporting around a stereo signal.
The signal that leaves the mixer and goes to the speakers is stereo (because you have two speakers, one on the left and one on the right)
A TS (Tip, Sleeve) cable instead is a cable carrying one signal only. It's called "mono" because, well, it carries only one signal. A regular microphone signal is for example a mono signal (unless of course you are using a stereo microphone
A signal path that can transport a signal is called "channel" - because the signal flows in it. A channel is made by a sequence of devices connected one after the other. There are stereo channels and mono channels, and a mixer usually allows you to combine a certain number of both - your mixer has 16 mono
channels available. Each of them has a preamp, an insert point, an equalizer, a gain control, a fader etc..
(note that "channel" is sometimes used for the two mono components of a stereo signal, like in "left and right channel" - it's not confusing because it's usually quite clear what one's talking about).
The "insert point" is a socket which accepts a TRS (stereo) cable.. and uses its capability to carry two signals in a clever way: the (say) "left" side of the cable is used to send
a signal to a mono input of a processor , while the other side is used to return the processed signal. So basically a stereo cable is used to carry a mono signal to the processor and back.
In order to do so you need a cable that uses a TRS jack on the mixer side, but splits into two TS (mono) jacks on the others ide, so you can place one in the input of the processor (to send the mono signal to be processed), and one in the output (to get the mono processed signal back).
Since this cable starts with one and bifurcates in two, it's called a Y cable
Now your Lexicon is a stereo
effect box: it's capable to process two mono signals at the same time. To do so, it has two mono
Left and Right inptus and produces two mono Left and Right outputs. Two monos = stereo. As a note, Lexicon could have chosen to use a single TRS socket like the mixer does, but there are reasons for which effects usually don't - mostly ease of chaining mono and stereo effects.
It can also be used in mono (i.e. to process only one
signal) by leaving the R input and output empty, with nothing coming in (and therefore nothing coming out). In this case it will notice that there's nothing on the R input and it will adjust how it works accordingly.
So it depends on what you want to do
. Do you want to process a single mono signal ? You will need only one Y cable (TRS to two TS) , from the channel mixer insert point to the Left side of the Lexicon.
Do you want to process a stereo signal (for example, the entire stereo mix before it reaches the speakers)? Then you will need two Y cables: one for the Left, on for the Right.