On Wed, 7 Mar 2018, at 21:29, Rodolfo Medina wrote: > Fantastic... On the back of the device I read `PLAYBACK OUTPUTS'. I wish to > better understand those entries: two white, two red and four black. Please > what's the difference between them, and how do they work?
There's 4 phono (RCA) sockets - the white and red ones, giving you conventional RCA/phono connections eg to an amplifier. Those will be 'unbalanced' connections ie each has a signal and a screen. Each of the four outputs is also provided on a 1/4-inch jack socket (the four black holes you can see). It's just a different type of connector providing the same output signal, possibly 'balanced' on a TRS (tip, ring, sleeve) jack... The specifications listed at http://www.musictri.be/Categories/Behringer/Computer-Audio/Interfaces/UMC404HD/p/P0BK1 do not make it clear whether the four output 1/4" jacks are TRS or not, though it does say that the 'main outputs' (presumaby a stereo monitor mix) are available on balanced TRS jacks as well as balanced XLRs. Ah... the "Quick Start Guide" available on: http://www.musictri.be/Categories/Behringer/Computer-Audio/Interfaces/UMC404HD/p/P0BK1/downloads has a more detailed list of what each socket is - those 4 'black holes' ARE 'TLS' jacks, ie balanced - that is there's three connections for each channel - the +ve half of a waveform, the -ve half, & the screen. So if you were connecting the four channel outputs to domestic audio/hifi equipment you'd use the RCA phono jacks (the white and red ones) and if you were connecting it to studio equipment that could handle/expected balanced connections you'd use the TLS jacks (black sockets). -- Jeremy Nicoll - my opinions are my own.
