DSP, help setting up correctly

Yes... If the DSP will allow you to do that. Can you assign more than 1 input to an output?

Jack1991 wrote:

Yes should do it, your phone will still need to be cranked up pretty high but this should work better than it did before.

toastyghost wrote: In that last photo, you have a 1/8” TRS jack on the red cable, going to what I presume is a right angled 1/4” TRS jack? If so, you’re taking a stereo output from your phone and feeding it into a balanced mono input. A balanced jack connection expects a polarity inverted signal on the ring, which is used to remove noise from the signal. You’re sending the right channel there instead... Your DSP has two inputs, I presume? You need 1x 1/8” TRS to 2x 1/4” TS jack connectors, and one of those jacks will go into each DSP input. The connection will be unbalanced, so keep the cable length reasonably short. Essentially this.

Edited by Jack1991 - 19 April 2021 at 8:38am

Jack1991 wrote: So just out of interest to try and understand it better. Would a Stereo 1/4 jack adapter with the 2 rings like this also work aswell?  (instead of the Y splitter cable obviously) So it would go 1/8 jack from my mobile phone to the Stereo 1/4 jack adapter into the dsp input 1.

Nope. You’d have a similar issue, although it wouldn’t be shorted physically like you have now with a 1/4” TS jack. The inputs on the DSP are for a single channel. Using a TRS connector on those inputs would only work for a balanced connection, which your phone doesn’t have.

You need to split the connection to get stereo into the DSP. Don’t forget you’ll need to adjust your settings to suit, otherwise you’ll only be outputting the left channel to the amp.

One thing I think a lot of people miss with this stuff is that it becomes a lot easier to understand if you get a pen out and drawing a block diagram of the signal flow. Don’t worry, it often seems to be forgotten a lot even at the ‘professional’ level for gigs or installations where things are way more complicated. That’s the sort of thing that bites you in the arse when the client wants to change something and you can’t remember exactly what clever idea you had back on install day, or worse, some other contractor has messed with it...

Anyway.

The manual for the DSP probably has one for the stuff it does internally that could be a start point, but if you want to keep things simple just draw it as a box with the correct number of ins and outs. Make it large enough that you can join the input(s) to the output(s) accordingly inside the box. Use a pencil perhaps, because you’ll probably want to change it or spot a mistake.

See how you get on. It also seems like you’re coming at this stuff fresh so I’d suggest the Yamaha Sound Reinforcement Handbook. Either buying a physical copy or tracking down a PDF if that’s your thing. It’s ancient but the principles in it are still valid and the flow of the book seems to work well for a lot of people.

Ok so Conanski i have tried your suggestion and unfortunately it has not worked and the outcome was exactly the same as before, with the input lights only lighting up when having my phone on max volume.

Edited by Jack1991 - 19 April 2021 at 9:09pm